Class Digester

java.lang.Object
org.xml.sax.helpers.DefaultHandler
org.apache.commons.digester.Digester
All Implemented Interfaces:
ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class Digester extends DefaultHandler

A Digester processes an XML input stream by matching a series of element nesting patterns to execute Rules that have been added prior to the start of parsing.

See the Digester Developer Guide for more information.

IMPLEMENTATION NOTE - A single Digester instance may only be used within the context of a single thread at a time, and a call to parse() must be completed before another can be initiated even from the same thread.

A Digester instance should not be used for parsing more than one input document. The problem is that the Digester class has quite a few member variables whose values "evolve" as SAX events are received during a parse. When reusing the Digester instance, all these members must be reset back to their initial states before the second parse begins. The "clear()" method makes a stab at resetting these, but it is actually rather a difficult problem. If you are determined to reuse Digester instances, then at the least you should call the clear() method before each parse, and must call it if the Digester parse terminates due to an exception during a parse.

LEGACY IMPLEMENTATION NOTE - When using the legacy XML schema support (instead of using the Schema class), a bug in Xerces 2.0.2 prevents the support of XML schema. You need Xerces 2.1/2.3 and up to make this class work with the legacy XML schema support.

This package was inspired by the XmlMapper class that was part of Tomcat 3.0 and 3.1, but is organized somewhat differently.

  • Field Details

    • bodyText

      protected StringBuffer bodyText
      The body text of the current element.
    • bodyTexts

      protected Stack<StringBuffer> bodyTexts
      The stack of body text string buffers for surrounding elements.
    • matches

      protected Stack<List<Rule>> matches
      Stack whose elements are List objects, each containing a list of Rule objects as returned from Rules.getMatch(). As each xml element in the input is entered, the matching rules are pushed onto this stack. After the end tag is reached, the matches are popped again. The depth of is stack is therefore exactly the same as the current "nesting" level of the input xml.
      Since:
      1.6
    • classLoader

      protected ClassLoader classLoader
      The class loader to use for instantiating application objects. If not specified, the context class loader, or the class loader used to load Digester itself, is used, based on the value of the useContextClassLoader variable.
    • configured

      protected boolean configured
      Has this Digester been configured yet.
    • entityResolver

      protected EntityResolver entityResolver
      The EntityResolver used by the SAX parser. By default it use this class
    • entityValidator

      protected HashMap<String,URL> entityValidator
      The URLs of entityValidator that have been registered, keyed by the public identifier that corresponds.
    • errorHandler

      protected ErrorHandler errorHandler
      The application-supplied error handler that is notified when parsing warnings, errors, or fatal errors occur.
    • factory

      protected SAXParserFactory factory
      The SAXParserFactory that is created the first time we need it.
    • JAXP_SCHEMA_LANGUAGE

      @Deprecated protected String JAXP_SCHEMA_LANGUAGE
      Deprecated.
      This is now managed by ParserFeatureSetterFactory
    • locator

      protected Locator locator
      The Locator associated with our parser.
    • match

      protected String match
      The current match pattern for nested element processing.
    • namespaceAware

      protected boolean namespaceAware
      Do we want a "namespace aware" parser.
    • namespaces

      protected HashMap<String,Stack<String>> namespaces
      Registered namespaces we are currently processing. The key is the namespace prefix that was declared in the document. The value is an Stack of the namespace URIs this prefix has been mapped to -- the top Stack element is the most current one. (This architecture is required because documents can declare nested uses of the same prefix for different Namespace URIs).
    • xincludeAware

      protected boolean xincludeAware
      Do we want a "XInclude aware" parser.
    • params

      protected Stack<Object> params
      The parameters stack being utilized by CallMethodRule and CallParamRule rules.
      Since:
      2.0
    • parser

      protected SAXParser parser
      The SAXParser we will use to parse the input stream.
    • publicId

      protected String publicId
      The public identifier of the DTD we are currently parsing under (if any).
    • reader

      protected XMLReader reader
      The XMLReader used to parse digester rules.
    • root

      protected Object root
      The "root" element of the stack (in other words, the last object that was popped.
    • rules

      protected Rules rules
      The Rules implementation containing our collection of Rule instances and associated matching policy. If not established before the first rule is added, a default implementation will be provided.
    • schemaLanguage

      @Deprecated protected String schemaLanguage
      Deprecated.
      Use Schema support instead.
      The XML schema language to use for validating an XML instance. By default this value is set to W3C_XML_SCHEMA
    • schemaLocation

      @Deprecated protected String schemaLocation
      Deprecated.
      Use Schema support instead.
      The XML schema to use for validating an XML instance.
    • schema

      protected Schema schema
      The XML schema to use for validating an XML instance.
      Since:
      2.0
    • stack

      protected Stack<Object> stack
      The object stack being constructed.
    • useContextClassLoader

      protected boolean useContextClassLoader
      Do we want to use the Context ClassLoader when loading classes for instantiating new objects. Default is false.
    • validating

      protected boolean validating
      Do we want to use a validating parser.
    • log

      protected org.apache.commons.logging.Log log
      The Log to which most logging calls will be made.
    • saxLog

      protected org.apache.commons.logging.Log saxLog
      The Log to which all SAX event related logging calls will be made.
    • W3C_XML_SCHEMA

      protected static final String W3C_XML_SCHEMA
      The schema language supported. By default, we use this one.
      See Also:
    • substitutor

      protected Substitutor substitutor
      An optional class that substitutes values in attributes and body text. This may be null and so a null check is always required before use.
    • stacksByName

      private HashMap<String,Stack<Object>> stacksByName
      Stacks used for interrule communication, indexed by name String
    • customContentHandler

      private ContentHandler customContentHandler
      If not null, then calls by the parser to this object's characters, startElement, endElement and processingInstruction methods are forwarded to the specified object. This is intended to allow rules to temporarily "take control" of the sax events. In particular, this is used by NodeCreateRule.

      See setCustomContentHandler.

    • stackAction

      private StackAction stackAction
      Object which will receive callbacks for every pop/push action on the default stack or named stacks.
    • inputSources

      protected List<InputSource> inputSources

      List of InputSource instances created by a createInputSourceFromURL() method call. These represent open input streams that need to be closed to avoid resource leaks, as well as potentially locked JAR files on Windows.

  • Constructor Details

    • Digester

      public Digester()
      Construct a new Digester with default properties.
    • Digester

      public Digester(SAXParser parser)
      Construct a new Digester, allowing a SAXParser to be passed in. This allows Digester to be used in environments which are unfriendly to JAXP1.1 (such as WebLogic 6.0). This may help in places where you are able to load JAXP 1.1 classes yourself.
    • Digester

      public Digester(XMLReader reader)
      Construct a new Digester, allowing an XMLReader to be passed in. This allows Digester to be used in environments which are unfriendly to JAXP1.1 (such as WebLogic 6.0). Note that if you use this option you have to configure namespace and validation support yourself, as these properties only affect the SAXParser and emtpy constructor.
  • Method Details

    • findNamespaceURI

      public String findNamespaceURI(String prefix)
      Return the currently mapped namespace URI for the specified prefix, if any; otherwise return null. These mappings come and go dynamically as the document is parsed.
      Parameters:
      prefix - Prefix to look up
    • getClassLoader

      public ClassLoader getClassLoader()
      Return the class loader to be used for instantiating application objects when required. This is determined based upon the following rules:
      • The class loader set by setClassLoader(), if any
      • The thread context class loader, if it exists and the useContextClassLoader property is set to true
      • The class loader used to load the Digester class itself.
    • setClassLoader

      public void setClassLoader(ClassLoader classLoader)
      Set the class loader to be used for instantiating application objects when required.
      Parameters:
      classLoader - The new class loader to use, or null to revert to the standard rules
    • getCount

      public int getCount()
      Return the current depth of the element stack.
    • getCurrentElementName

      public String getCurrentElementName()
      Return the name of the XML element that is currently being processed.
    • getDebug

      @Deprecated public int getDebug()
      Deprecated.
      This method now always returns 0. Digester uses the apache jakarta commons-logging library; see the documentation for that library for more information.
      Return the debugging detail level of our currently enabled logger.
    • setDebug

      @Deprecated public void setDebug(int debug)
      Deprecated.
      This method now has no effect at all. Digester uses the apache jakarta comons-logging library; see the documentation for that library for more information.
      Set the debugging detail level of our currently enabled logger.
      Parameters:
      debug - New debugging detail level (0=off, increasing integers for more detail)
    • getErrorHandler

      public ErrorHandler getErrorHandler()
      Return the error handler for this Digester.
    • setErrorHandler

      public void setErrorHandler(ErrorHandler errorHandler)
      Set the error handler for this Digester.
      Parameters:
      errorHandler - The new error handler
    • getFactory

      public SAXParserFactory getFactory()
      Return the SAXParserFactory we will use, creating one if necessary.
    • getFeature

      Returns a flag indicating whether the requested feature is supported by the underlying implementation of org.xml.sax.XMLReader. See the saxproject website for information about the standard SAX2 feature flags.
      Parameters:
      feature - Name of the feature to inquire about
      Throws:
      ParserConfigurationException - if a parser configuration error occurs
      SAXNotRecognizedException - if the property name is not recognized
      SAXNotSupportedException - if the property name is recognized but not supported
    • setFeature

      public void setFeature(String feature, boolean value) throws ParserConfigurationException, SAXNotRecognizedException, SAXNotSupportedException
      Sets a flag indicating whether the requested feature is supported by the underlying implementation of org.xml.sax.XMLReader. See the saxproject website for information about the standard SAX2 feature flags. In order to be effective, this method must be called before the getParser() method is called for the first time, either directly or indirectly.
      Parameters:
      feature - Name of the feature to set the status for
      value - The new value for this feature
      Throws:
      ParserConfigurationException - if a parser configuration error occurs
      SAXNotRecognizedException - if the property name is not recognized
      SAXNotSupportedException - if the property name is recognized but not supported
    • getLogger

      public org.apache.commons.logging.Log getLogger()
      Return the current Logger associated with this instance of the Digester
    • setLogger

      public void setLogger(org.apache.commons.logging.Log log)
      Set the current logger for this Digester.
    • getSAXLogger

      public org.apache.commons.logging.Log getSAXLogger()
      Gets the logger used for logging SAX-related information. Note the output is finely grained.
      Since:
      1.6
    • setSAXLogger

      public void setSAXLogger(org.apache.commons.logging.Log saxLog)
      Sets the logger used for logging SAX-related information. Note the output is finely grained.
      Parameters:
      saxLog - Log, not null
      Since:
      1.6
    • getMatch

      public String getMatch()
      Return the current rule match path
    • getNamespaceAware

      public boolean getNamespaceAware()
      Return the "namespace aware" flag for parsers we create.
    • setNamespaceAware

      public void setNamespaceAware(boolean namespaceAware)
      Set the "namespace aware" flag for parsers we create.
      Parameters:
      namespaceAware - The new "namespace aware" flag
    • getXIncludeAware

      public boolean getXIncludeAware()
      Return the XInclude-aware flag for parsers we create. XInclude functionality additionally requires namespace-awareness.
      Returns:
      The XInclude-aware flag
      Since:
      2.0
      See Also:
    • setXIncludeAware

      public void setXIncludeAware(boolean xincludeAware)
      Set the XInclude-aware flag for parsers we create. This additionally requires namespace-awareness.
      Parameters:
      xincludeAware - The new XInclude-aware flag
      Since:
      2.0
      See Also:
    • setPublicId

      public void setPublicId(String publicId)
      Set the publid id of the current file being parse.
      Parameters:
      publicId - the DTD/Schema public's id.
    • getPublicId

      public String getPublicId()
      Return the public identifier of the DTD we are currently parsing under, if any.
    • getRuleNamespaceURI

      public String getRuleNamespaceURI()
      Return the namespace URI that will be applied to all subsequently added Rule objects.
    • setRuleNamespaceURI

      public void setRuleNamespaceURI(String ruleNamespaceURI)
      Set the namespace URI that will be applied to all subsequently added Rule objects.
      Parameters:
      ruleNamespaceURI - Namespace URI that must match on all subsequently added rules, or null for matching regardless of the current namespace URI
    • getParser

      public SAXParser getParser()
      Return the SAXParser we will use to parse the input stream. If there is a problem creating the parser, return null.
    • getProperty

      public Object getProperty(String property) throws SAXNotRecognizedException, SAXNotSupportedException
      Return the current value of the specified property for the underlying XMLReader implementation. See the saxproject website for information about the standard SAX2 properties.
      Parameters:
      property - Property name to be retrieved
      Throws:
      SAXNotRecognizedException - if the property name is not recognized
      SAXNotSupportedException - if the property name is recognized but not supported
    • setProperty

      public void setProperty(String property, Object value) throws SAXNotRecognizedException, SAXNotSupportedException
      Set the current value of the specified property for the underlying XMLReader implementation. See the saxproject website for information about the standard SAX2 properties.
      Parameters:
      property - Property name to be set
      value - Property value to be set
      Throws:
      SAXNotRecognizedException - if the property name is not recognized
      SAXNotSupportedException - if the property name is recognized but not supported
    • getReader

      @Deprecated public XMLReader getReader()
      Deprecated.
      Use getXMLReader() instead, which can throw a SAXException if the reader cannot be instantiated
      By setting the reader in the constructor, you can bypass JAXP and be able to use digester in Weblogic 6.0.
    • getRules

      public Rules getRules()
      Return the Rules implementation object containing our rules collection and associated matching policy. If none has been established, a default implementation will be created and returned.
    • setRules

      public void setRules(Rules rules)
      Set the Rules implementation object containing our rules collection and associated matching policy.
      Parameters:
      rules - New Rules implementation
    • getSchema

      @Deprecated public String getSchema()
      Deprecated.
      Use Schema for validation instead.
      Return the XML Schema URI used for validating an XML instance.
      See Also:
    • setSchema

      @Deprecated public void setSchema(String schemaLocation)
      Deprecated.
      Use Schema for validation instead.
      Set the XML Schema URI used for validating the input XML.

      It is often desirable to force the input document to be validated against a particular schema regardless of what type the input document declares itself to be. This method allows that to be done.

      Note, however, that there is no standard API for enabling this feature on the underlying SAX parser; this method therefore only works for those parsers explicitly supported by Digester's ParserFeatureSetterFactory class. If the underlying parser does not support the feature, or is not one of the supported parsers, then an exception will be thrown when getParser is called (explicitly, or implicitly via the parse method).

      See also method setSchemaLanguage which allows the type of the schema specified here to be defined. By default, the schema is expected to be a W3C xml schema definition.

      IMPORTANT NOTE: This functionality was never very reliable, and has been horribly broken since the 1.6 release of Digester. There are currently no plans to fix it, so you are strongly recommended to avoid using this method. Instead, create an XMLParser instance yourself, configure validation appropriately, and pass it as a parameter to the Digester constructor.

      Parameters:
      schemaLocation - a URI to the schema.
      See Also:
    • getSchemaLanguage

      @Deprecated public String getSchemaLanguage()
      Deprecated.
      Use Schema for validation instead.
      Return the XML Schema language used when parsing.
      See Also:
    • setSchemaLanguage

      @Deprecated public void setSchemaLanguage(String schemaLanguage)
      Deprecated.
      Use Schema for validation instead.
      Set the XML Schema language used when parsing. By default, we use W3C.
      Parameters:
      schemaLanguage - a URI to the schema language.
      See Also:
    • getXMLSchema

      public Schema getXMLSchema()
      Return the XML Schema used when parsing.
      Returns:
      The Schema instance in use.
      Since:
      2.0
    • setXMLSchema

      public void setXMLSchema(Schema schema)
      Set the XML Schema to be used when parsing.
      Parameters:
      schema - The Schema instance to use.
      Since:
      2.0
    • getUseContextClassLoader

      public boolean getUseContextClassLoader()
      Return the boolean as to whether the context classloader should be used.
    • setUseContextClassLoader

      public void setUseContextClassLoader(boolean use)
      Determine whether to use the Context ClassLoader (the one found by calling Thread.currentThread().getContextClassLoader()) to resolve/load classes that are defined in various rules. If not using Context ClassLoader, then the class-loading defaults to using the calling-class' ClassLoader.
      Parameters:
      use - determines whether to use Context ClassLoader.
    • getValidating

      public boolean getValidating()
      Return the validating parser flag.
    • setValidating

      public void setValidating(boolean validating)
      Set the validating parser flag. This must be called before parse() is called the first time.
      Parameters:
      validating - The new validating parser flag.
    • getXMLReader

      public XMLReader getXMLReader() throws SAXException
      Return the XMLReader to be used for parsing the input document. FIX ME: there is a bug in JAXP/XERCES that prevent the use of a parser that contains a schema with a DTD.
      Throws:
      SAXException - if no XMLReader can be instantiated
    • getSubstitutor

      public Substitutor getSubstitutor()
      Gets the Substitutor used to convert attributes and body text.
      Returns:
      Substitutor, null if not substitutions are to be performed.
    • setSubstitutor

      public void setSubstitutor(Substitutor substitutor)
      Sets the Substitutor to be used to convert attributes and body text.
      Parameters:
      substitutor - the Substitutor to be used to convert attributes and body text or null if not substitution of these values is to be performed.
    • getCustomContentHandler

      public ContentHandler getCustomContentHandler()
    • setCustomContentHandler

      public void setCustomContentHandler(ContentHandler handler)
      Redirects (or cancels redirecting) of SAX ContentHandler events to an external object.

      When this object's customContentHandler is non-null, any SAX events received from the parser will simply be passed on to the specified object instead of this object handling them. This allows Rule classes to take control of the SAX event stream for a while in order to do custom processing. Such a rule should save the old value before setting a new one, and restore the old value in order to resume normal digester processing.

      An example of a Rule which needs this feature is NodeCreateRule.

      Note that saving the old value is probably not needed as it should always be null; a custom rule that wants to take control could only have been called when there was no custom content handler. But it seems cleaner to properly save/restore the value and maybe some day this will come in useful.

      Note also that this is not quite equivalent to

       digester.getXMLReader().setContentHandler(handler)
       
      for these reasons:
      • Some xml parsers don't like having setContentHandler called after parsing has started. The Aelfred parser is one example.
      • Directing the events via the Digester object potentially allows us to log information about those SAX events at the digester level.
      Since:
      1.7
    • setStackAction

      public void setStackAction(StackAction stackAction)
      Define a callback object which is invoked whever an object is pushed onto a digester object stack, or popped off one.
      Since:
      1.8
    • getStackAction

      public StackAction getStackAction()
      See setStackAction.
      Since:
      1.8
    • getCurrentNamespaces

      public Map<String,String> getCurrentNamespaces()
      Get the most current namespaces for all prefixes.
      Returns:
      Map A map with namespace prefixes as keys and most current namespace URIs for the corresponding prefixes as values
      Since:
      1.8
    • characters

      public void characters(char[] buffer, int start, int length) throws SAXException
      Process notification of character data received from the body of an XML element.
      Specified by:
      characters in interface ContentHandler
      Overrides:
      characters in class DefaultHandler
      Parameters:
      buffer - The characters from the XML document
      start - Starting offset into the buffer
      length - Number of characters from the buffer
      Throws:
      SAXException - if a parsing error is to be reported
    • endDocument

      public void endDocument() throws SAXException
      Process notification of the end of the document being reached.
      Specified by:
      endDocument in interface ContentHandler
      Overrides:
      endDocument in class DefaultHandler
      Throws:
      SAXException - if a parsing error is to be reported
    • endElement

      public void endElement(String namespaceURI, String localName, String qName) throws SAXException
      Process notification of the end of an XML element being reached.
      Specified by:
      endElement in interface ContentHandler
      Overrides:
      endElement in class DefaultHandler
      Parameters:
      namespaceURI - - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
      localName - - The local name (without prefix), or the empty string if Namespace processing is not being performed.
      qName - - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.
      Throws:
      SAXException - if a parsing error is to be reported
    • endPrefixMapping

      public void endPrefixMapping(String prefix) throws SAXException
      Process notification that a namespace prefix is going out of scope.
      Specified by:
      endPrefixMapping in interface ContentHandler
      Overrides:
      endPrefixMapping in class DefaultHandler
      Parameters:
      prefix - Prefix that is going out of scope
      Throws:
      SAXException - if a parsing error is to be reported
    • ignorableWhitespace

      public void ignorableWhitespace(char[] buffer, int start, int len) throws SAXException
      Process notification of ignorable whitespace received from the body of an XML element.
      Specified by:
      ignorableWhitespace in interface ContentHandler
      Overrides:
      ignorableWhitespace in class DefaultHandler
      Parameters:
      buffer - The characters from the XML document
      start - Starting offset into the buffer
      len - Number of characters from the buffer
      Throws:
      SAXException - if a parsing error is to be reported
    • processingInstruction

      public void processingInstruction(String target, String data) throws SAXException
      Process notification of a processing instruction that was encountered.
      Specified by:
      processingInstruction in interface ContentHandler
      Overrides:
      processingInstruction in class DefaultHandler
      Parameters:
      target - The processing instruction target
      data - The processing instruction data (if any)
      Throws:
      SAXException - if a parsing error is to be reported
    • getDocumentLocator

      public Locator getDocumentLocator()
      Gets the document locator associated with our parser.
      Returns:
      the Locator supplied by the document parser
    • setDocumentLocator

      public void setDocumentLocator(Locator locator)
      Sets the document locator associated with our parser.
      Specified by:
      setDocumentLocator in interface ContentHandler
      Overrides:
      setDocumentLocator in class DefaultHandler
      Parameters:
      locator - The new locator
    • skippedEntity

      public void skippedEntity(String name) throws SAXException
      Process notification of a skipped entity.
      Specified by:
      skippedEntity in interface ContentHandler
      Overrides:
      skippedEntity in class DefaultHandler
      Parameters:
      name - Name of the skipped entity
      Throws:
      SAXException - if a parsing error is to be reported
    • startDocument

      public void startDocument() throws SAXException
      Process notification of the beginning of the document being reached.
      Specified by:
      startDocument in interface ContentHandler
      Overrides:
      startDocument in class DefaultHandler
      Throws:
      SAXException - if a parsing error is to be reported
    • startElement

      public void startElement(String namespaceURI, String localName, String qName, Attributes list) throws SAXException
      Process notification of the start of an XML element being reached.
      Specified by:
      startElement in interface ContentHandler
      Overrides:
      startElement in class DefaultHandler
      Parameters:
      namespaceURI - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
      localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.
      qName - The qualified name (with prefix), or the empty string if qualified names are not available.\
      list - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.
      Throws:
      SAXException - if a parsing error is to be reported
    • startPrefixMapping

      public void startPrefixMapping(String prefix, String namespaceURI) throws SAXException
      Process notification that a namespace prefix is coming in to scope.
      Specified by:
      startPrefixMapping in interface ContentHandler
      Overrides:
      startPrefixMapping in class DefaultHandler
      Parameters:
      prefix - Prefix that is being declared
      namespaceURI - Corresponding namespace URI being mapped to
      Throws:
      SAXException - if a parsing error is to be reported
    • notationDecl

      public void notationDecl(String name, String publicId, String systemId)
      Receive notification of a notation declaration event.
      Specified by:
      notationDecl in interface DTDHandler
      Overrides:
      notationDecl in class DefaultHandler
      Parameters:
      name - The notation name
      publicId - The public identifier (if any)
      systemId - The system identifier (if any)
    • unparsedEntityDecl

      public void unparsedEntityDecl(String name, String publicId, String systemId, String notation)
      Receive notification of an unparsed entity declaration event.
      Specified by:
      unparsedEntityDecl in interface DTDHandler
      Overrides:
      unparsedEntityDecl in class DefaultHandler
      Parameters:
      name - The unparsed entity name
      publicId - The public identifier (if any)
      systemId - The system identifier (if any)
      notation - The name of the associated notation
    • setEntityResolver

      public void setEntityResolver(EntityResolver entityResolver)
      Set the EntityResolver used by SAX when resolving public id and system id. This must be called before the first call to parse().
      Parameters:
      entityResolver - a class that implement the EntityResolver interface.
    • getEntityResolver

      public EntityResolver getEntityResolver()
      Return the Entity Resolver used by the SAX parser.
      Returns:
      Return the Entity Resolver used by the SAX parser.
    • resolveEntity

      public InputSource resolveEntity(String publicId, String systemId) throws SAXException
      Resolve the requested external entity.
      Specified by:
      resolveEntity in interface EntityResolver
      Overrides:
      resolveEntity in class DefaultHandler
      Parameters:
      publicId - The public identifier of the entity being referenced
      systemId - The system identifier of the entity being referenced
      Throws:
      SAXException - if a parsing exception occurs
    • error

      public void error(SAXParseException exception) throws SAXException
      Forward notification of a parsing error to the application supplied error handler (if any).
      Specified by:
      error in interface ErrorHandler
      Overrides:
      error in class DefaultHandler
      Parameters:
      exception - The error information
      Throws:
      SAXException - if a parsing exception occurs
    • fatalError

      public void fatalError(SAXParseException exception) throws SAXException
      Forward notification of a fatal parsing error to the application supplied error handler (if any).
      Specified by:
      fatalError in interface ErrorHandler
      Overrides:
      fatalError in class DefaultHandler
      Parameters:
      exception - The fatal error information
      Throws:
      SAXException - if a parsing exception occurs
    • warning

      public void warning(SAXParseException exception) throws SAXException
      Forward notification of a parse warning to the application supplied error handler (if any).
      Specified by:
      warning in interface ErrorHandler
      Overrides:
      warning in class DefaultHandler
      Parameters:
      exception - The warning information
      Throws:
      SAXException - if a parsing exception occurs
    • log

      @Deprecated public void log(String message)
      Deprecated.
      Call getLogger() and use it's logging methods
      Log a message to our associated logger.
      Parameters:
      message - The message to be logged
    • log

      @Deprecated public void log(String message, Throwable exception)
      Deprecated.
      Call getLogger() and use it's logging methods
      Log a message and exception to our associated logger.
      Parameters:
      message - The message to be logged
    • parse

      public Object parse(File file) throws IOException, SAXException
      Parse the content of the specified file using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      file - File containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
    • parse

      public Object parse(InputSource input) throws IOException, SAXException
      Parse the content of the specified input source using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      input - Input source containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
    • parse

      public Object parse(InputStream input) throws IOException, SAXException
      Parse the content of the specified input stream using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      input - Input stream containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
    • parse

      public Object parse(Reader reader) throws IOException, SAXException
      Parse the content of the specified reader using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      reader - Reader containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
    • parse

      public Object parse(String uri) throws IOException, SAXException
      Parse the content of the specified URI using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      uri - URI containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
    • parse

      public Object parse(URL url) throws IOException, SAXException
      Parse the content of the specified URL using this Digester. Returns the root element from the object stack (if any).
      Parameters:
      url - URL containing the XML data to be parsed
      Throws:
      IOException - if an input/output error occurs
      SAXException - if a parsing exception occurs
      Since:
      1.8
    • register

      public void register(String publicId, URL entityURL)

      Register the specified DTD URL for the specified public identifier. This must be called before the first call to parse().

      Digester contains an internal EntityResolver implementation. This maps PUBLICID's to URLs (from which the resource will be loaded). A common use case for this method is to register local URLs (possibly computed at runtime by a classloader) for DTDs. This allows the performance advantage of using a local version without having to ensure every SYSTEM URI on every processed xml document is local. This implementation provides only basic functionality. If more sophisticated features are required, using setEntityResolver(org.xml.sax.EntityResolver) to set a custom resolver is recommended.

      Note: This method will have no effect when a custom EntityResolver has been set. (Setting a custom EntityResolver overrides the internal implementation.)

      Parameters:
      publicId - Public identifier of the DTD to be resolved
      entityURL - The URL to use for reading this DTD
      Since:
      1.8
    • register

      public void register(String publicId, String entityURL)

      Convenience method that registers the string version of an entity URL instead of a URL version.

      Parameters:
      publicId - Public identifier of the entity to be resolved
      entityURL - The URL to use for reading this entity
    • createInputSourceFromURL

      public InputSource createInputSourceFromURL(URL url) throws MalformedURLException, IOException
      Given a URL, return an InputSource that reads from that URL.

      Ideally this function would not be needed and code could just use new InputSource(entityURL). Unfortunately it appears that when the entityURL points to a file within a jar archive a caching mechanism inside the InputSource implementation causes a file-handle to the jar file to remain open. On Windows systems this then causes the jar archive file to be locked on disk ("in use") which makes it impossible to delete the jar file - and that really stuffs up "undeploy" in webapps in particular.

      In JDK1.4 and later, Apache XercesJ is used as the xml parser. The InputSource object provided is converted into an XMLInputSource, and eventually passed to an instance of XMLDocumentScannerImpl to specify the source data to be converted into tokens for the rest of the XMLReader code to handle. XMLDocumentScannerImpl calls fEntityManager.startDocumentEntity(source), where fEntityManager is declared in ancestor class XMLScanner to be an XMLEntityManager. In that class, if the input source stream is null, then:

        URL location = new URL(expandedSystemId);
        URLConnection connect = location.openConnection();
        if (connect instanceof HttpURLConnection) {
          setHttpProperties(connect,xmlInputSource);
        }
        stream = connect.getInputStream();
       
      This method pretty much duplicates the standard behaviour, except that it calls URLConnection.setUseCaches(false) before opening the connection.
      Throws:
      MalformedURLException
      IOException
      Since:
      1.8
    • createInputSourceFromURL

      public InputSource createInputSourceFromURL(String url) throws MalformedURLException, IOException

      Convenience method that creates an InputSource from the string version of a URL.

      Parameters:
      url - URL for which to create an InputSource
      Throws:
      MalformedURLException
      IOException
      Since:
      1.8
    • addRule

      public void addRule(String pattern, Rule rule)

      Register a new Rule matching the specified pattern. This method sets the Digester property on the rule.

      Parameters:
      pattern - Element matching pattern
      rule - Rule to be registered
    • addRuleSet

      public void addRuleSet(RuleSet ruleSet)
      Register a set of Rule instances defined in a RuleSet.
      Parameters:
      ruleSet - The RuleSet instance to configure from
    • addBeanPropertySetter

      public void addBeanPropertySetter(String pattern)
      Add a "bean property setter" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      See Also:
    • addBeanPropertySetter

      public void addBeanPropertySetter(String pattern, String propertyName)
      Add a "bean property setter" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      propertyName - Name of property to set
      See Also:
    • addCallMethod

      public void addCallMethod(String pattern, String methodName)
      Add an "call method" rule for a method which accepts no arguments.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to be called
      See Also:
    • addCallMethod

      public void addCallMethod(String pattern, String methodName, int paramCount)
      Add an "call method" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to be called
      paramCount - Number of expected parameters (or zero for a single parameter from the body of this element)
      See Also:
    • addCallMethod

      public void addCallMethod(String pattern, String methodName, int paramCount, String[] paramTypes)
      Add an "call method" rule for the specified parameters. If paramCount is set to zero the rule will use the body of the matched element as the single argument of the method, unless paramTypes is null or empty, in this case the rule will call the specified method with no arguments.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to be called
      paramCount - Number of expected parameters (or zero for a single parameter from the body of this element)
      paramTypes - Set of Java class names for the types of the expected parameters (if you wish to use a primitive type, specify the corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)
      See Also:
    • addCallMethod

      public void addCallMethod(String pattern, String methodName, int paramCount, Class<?>[] paramTypes)
      Add an "call method" rule for the specified parameters. If paramCount is set to zero the rule will use the body of the matched element as the single argument of the method, unless paramTypes is null or empty, in this case the rule will call the specified method with no arguments.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to be called
      paramCount - Number of expected parameters (or zero for a single parameter from the body of this element)
      paramTypes - The Java class names of the arguments (if you wish to use a primitive type, specify the corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)
      See Also:
    • addCallParam

      public void addCallParam(String pattern, int paramIndex)
      Add a "call parameter" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      paramIndex - Zero-relative parameter index to set (from the body of this element)
      See Also:
    • addCallParam

      public void addCallParam(String pattern, int paramIndex, String attributeName)
      Add a "call parameter" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      paramIndex - Zero-relative parameter index to set (from the specified attribute)
      attributeName - Attribute whose value is used as the parameter value
      See Also:
    • addCallParam

      public void addCallParam(String pattern, int paramIndex, boolean fromStack)
      Add a "call parameter" rule. This will either take a parameter from the stack or from the current element body text.
      Parameters:
      paramIndex - The zero-relative parameter number
      fromStack - Should the call parameter be taken from the top of the stack?
      See Also:
    • addCallParam

      public void addCallParam(String pattern, int paramIndex, int stackIndex)
      Add a "call parameter" rule that sets a parameter from the stack. This takes a parameter from the given position on the stack.
      Parameters:
      paramIndex - The zero-relative parameter number
      stackIndex - set the call parameter to the stackIndex'th object down the stack, where 0 is the top of the stack, 1 the next element down and so on
      See Also:
    • addCallParamPath

      public void addCallParamPath(String pattern, int paramIndex)
      Add a "call parameter" rule that sets a parameter from the current Digester matching path. This is sometimes useful when using rules that support wildcards.
      Parameters:
      pattern - the pattern that this rule should match
      paramIndex - The zero-relative parameter number
      See Also:
    • addObjectParam

      public void addObjectParam(String pattern, int paramIndex, Object paramObj)
      Add a "call parameter" rule that sets a parameter from a caller-provided object. This can be used to pass constants such as strings to methods; it can also be used to pass mutable objects, providing ways for objects to do things like "register" themselves with some shared object.

      Note that when attempting to locate a matching method to invoke, the true type of the paramObj is used, so that despite the paramObj being passed in here as type Object, the target method can declare its parameters as being the true type of the object (or some ancestor type, according to the usual type-conversion rules).

      Parameters:
      paramIndex - The zero-relative parameter number
      paramObj - Any arbitrary object to be passed to the target method.
      Since:
      1.6
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, String className)
      Add a "factory create" rule for the specified parameters. Exceptions thrown during the object creation process will be propagated.
      Parameters:
      pattern - Element matching pattern
      className - Java class name of the object creation factory class
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, Class<?> clazz)
      Add a "factory create" rule for the specified parameters. Exceptions thrown during the object creation process will be propagated.
      Parameters:
      pattern - Element matching pattern
      clazz - Java class of the object creation factory class
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, String className, String attributeName)
      Add a "factory create" rule for the specified parameters. Exceptions thrown during the object creation process will be propagated.
      Parameters:
      pattern - Element matching pattern
      className - Java class name of the object creation factory class
      attributeName - Attribute name which, if present, overrides the value specified by className
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, Class<?> clazz, String attributeName)
      Add a "factory create" rule for the specified parameters. Exceptions thrown during the object creation process will be propagated.
      Parameters:
      pattern - Element matching pattern
      clazz - Java class of the object creation factory class
      attributeName - Attribute name which, if present, overrides the value specified by className
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, ObjectCreationFactory creationFactory)
      Add a "factory create" rule for the specified parameters. Exceptions thrown during the object creation process will be propagated.
      Parameters:
      pattern - Element matching pattern
      creationFactory - Previously instantiated ObjectCreationFactory to be utilized
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, String className, boolean ignoreCreateExceptions)
      Add a "factory create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      className - Java class name of the object creation factory class
      ignoreCreateExceptions - when true any exceptions thrown during object creation will be ignored.
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, Class<?> clazz, boolean ignoreCreateExceptions)
      Add a "factory create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      clazz - Java class of the object creation factory class
      ignoreCreateExceptions - when true any exceptions thrown during object creation will be ignored.
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, String className, String attributeName, boolean ignoreCreateExceptions)
      Add a "factory create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      className - Java class name of the object creation factory class
      attributeName - Attribute name which, if present, overrides the value specified by className
      ignoreCreateExceptions - when true any exceptions thrown during object creation will be ignored.
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, Class<?> clazz, String attributeName, boolean ignoreCreateExceptions)
      Add a "factory create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      clazz - Java class of the object creation factory class
      attributeName - Attribute name which, if present, overrides the value specified by className
      ignoreCreateExceptions - when true any exceptions thrown during object creation will be ignored.
      See Also:
    • addFactoryCreate

      public void addFactoryCreate(String pattern, ObjectCreationFactory creationFactory, boolean ignoreCreateExceptions)
      Add a "factory create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      creationFactory - Previously instantiated ObjectCreationFactory to be utilized
      ignoreCreateExceptions - when true any exceptions thrown during object creation will be ignored.
      See Also:
    • addObjectCreate

      public void addObjectCreate(String pattern, String className)
      Add an "object create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      className - Java class name to be created
      See Also:
    • addObjectCreate

      public void addObjectCreate(String pattern, Class<?> clazz)
      Add an "object create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      clazz - Java class to be created
      See Also:
    • addObjectCreate

      public void addObjectCreate(String pattern, String className, String attributeName)
      Add an "object create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      className - Default Java class name to be created
      attributeName - Attribute name that optionally overrides the default Java class name to be created
      See Also:
    • addObjectCreate

      public void addObjectCreate(String pattern, String attributeName, Class<?> clazz)
      Add an "object create" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      attributeName - Attribute name that optionally overrides
      clazz - Default Java class to be created the default Java class name to be created
      See Also:
    • addSetNestedProperties

      public void addSetNestedProperties(String pattern)
      Parameters:
      pattern - register the rule with this pattern
      Since:
      1.6
    • addSetNestedProperties

      public void addSetNestedProperties(String pattern, String elementName, String propertyName)
      Parameters:
      pattern - register the rule with this pattern
      elementName - elment name that a property maps to
      propertyName - property name of the element mapped from
      Since:
      1.6
    • addSetNestedProperties

      public void addSetNestedProperties(String pattern, String[] elementNames, String[] propertyNames)
      Parameters:
      pattern - register the rule with this pattern
      elementNames - elment names that (in order) map to properties
      propertyNames - property names that (in order) elements are mapped to
      Since:
      1.6
    • addSetNext

      public void addSetNext(String pattern, String methodName)
      Add a "set next" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the parent element
      See Also:
    • addSetNext

      public void addSetNext(String pattern, String methodName, String paramType)
      Add a "set next" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the parent element
      paramType - Java class name of the expected parameter type (if you wish to use a primitive type, specify the corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)
      See Also:
    • addSetRoot

      public void addSetRoot(String pattern, String methodName)
      Add SetRootRule with the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the root object
      See Also:
    • addSetRoot

      public void addSetRoot(String pattern, String methodName, String paramType)
      Add SetRootRule with the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the root object
      paramType - Java class name of the expected parameter type
      See Also:
    • addSetProperties

      public void addSetProperties(String pattern)
      Add a "set properties" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      See Also:
    • addSetProperties

      public void addSetProperties(String pattern, String attributeName, String propertyName)
      Add a "set properties" rule with a single overridden parameter. See SetPropertiesRule(String attributeName, String propertyName)
      Parameters:
      pattern - Element matching pattern
      attributeName - map this attribute
      propertyName - to this property
      See Also:
    • addSetProperties

      public void addSetProperties(String pattern, String[] attributeNames, String[] propertyNames)
      Add a "set properties" rule with overridden parameters. See SetPropertiesRule(String [] attributeNames, String [] propertyNames)
      Parameters:
      pattern - Element matching pattern
      attributeNames - names of attributes with custom mappings
      propertyNames - property names these attributes map to
      See Also:
    • addSetProperty

      public void addSetProperty(String pattern, String name, String value)
      Add a "set property" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      name - Attribute name containing the property name to be set
      value - Attribute name containing the property value to set
      See Also:
    • addSetTop

      public void addSetTop(String pattern, String methodName)
      Add a "set top" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the parent element
      See Also:
    • addSetTop

      public void addSetTop(String pattern, String methodName, String paramType)
      Add a "set top" rule for the specified parameters.
      Parameters:
      pattern - Element matching pattern
      methodName - Method name to call on the parent element
      paramType - Java class name of the expected parameter type (if you wish to use a primitive type, specify the corresonding Java wrapper class instead, such as java.lang.Boolean for a boolean parameter)
      See Also:
    • clear

      public void clear()
      Clear the current contents of the default object stack, the param stack, all named stacks, and other internal variables.

      Calling this method might allow another document of the same type to be correctly parsed. However this method was not intended for this purpose (just to tidy up memory usage). In general, a separate Digester object should be created for each document to be parsed.

      Note that this method is called automatically after a document has been successfully parsed by a Digester instance. However it is not invoked automatically when a parse fails, so when reusing a Digester instance (which is not recommended) this method must be called manually after a parse failure.

    • peek

      public Object peek()
      Return the top object on the stack without removing it. If there are no objects on the stack, return null.
    • peek

      public Object peek(int n)
      Return the n'th object down the stack, where 0 is the top element and [getCount()-1] is the bottom element. If the specified index is out of range, return null.
      Parameters:
      n - Index of the desired element, where 0 is the top of the stack, 1 is the next element down, and so on.
    • pop

      public Object pop()
      Pop the top object off of the stack, and return it. If there are no objects on the stack, return null.
    • push

      public void push(Object object)
      Push a new object onto the top of the object stack.
      Parameters:
      object - The new object
    • push

      public void push(String stackName, Object value)
      Pushes the given object onto the stack with the given name. If no stack already exists with the given name then one will be created.
      Parameters:
      stackName - the name of the stack onto which the object should be pushed
      value - the Object to be pushed onto the named stack.
      Since:
      1.6
    • pop

      public Object pop(String stackName)

      Pops (gets and removes) the top object from the stack with the given name.

      Note: a stack is considered empty if no objects have been pushed onto it yet.

      Parameters:
      stackName - the name of the stack from which the top value is to be popped.
      Returns:
      the top Object on the stack or or null if the stack is either empty or has not been created yet
      Throws:
      EmptyStackException - if the named stack is empty
      Since:
      1.6
    • peek

      public Object peek(String stackName)

      Gets the top object from the stack with the given name. This method does not remove the object from the stack.

      Note: a stack is considered empty if no objects have been pushed onto it yet.

      Parameters:
      stackName - the name of the stack to be peeked
      Returns:
      the top Object on the stack or null if the stack is either empty or has not been created yet
      Throws:
      EmptyStackException - if the named stack is empty
      Since:
      1.6
    • peek

      public Object peek(String stackName, int n)

      Gets the top object from the stack with the given name. This method does not remove the object from the stack.

      Note: a stack is considered empty if no objects have been pushed onto it yet.

      Parameters:
      stackName - the name of the stack to be peeked
      n - Index of the desired element, where 0 is the top of the stack, 1 is the next element down, and so on.
      Returns:
      the specified Object on the stack.
      Throws:
      EmptyStackException - if the named stack is empty
      Since:
      1.6
    • isEmpty

      public boolean isEmpty(String stackName)

      Is the stack with the given name empty?

      Note: a stack is considered empty if no objects have been pushed onto it yet.

      Parameters:
      stackName - the name of the stack whose emptiness should be evaluated
      Returns:
      true if the given stack if empty
      Since:
      1.6
    • getRoot

      public Object getRoot()
      Returns the root element of the tree of objects created as a result of applying the rule objects to the input XML.

      If the digester stack was "primed" by explicitly pushing a root object onto the stack before parsing started, then that root object is returned here.

      Alternatively, if a Rule which creates an object (eg ObjectCreateRule) matched the root element of the xml, then the object created will be returned here.

      In other cases, the object most recently pushed onto an empty digester stack is returned. This would be a most unusual use of digester, however; one of the previous configurations is much more likely.

      Note that when using one of the Digester.parse methods, the return value from the parse method is exactly the same as the return value from this method. However when the Digester is being used as a SAXContentHandler, no such return value is available; in this case, this method allows you to access the root object that has been created after parsing has completed.

      Returns:
      the root object that has been created after parsing or null if the digester has not parsed any XML yet.
    • resetRoot

      public void resetRoot()
      This method allows the "root" variable to be reset to null.

      It is not considered safe for a digester instance to be reused to parse multiple xml documents. However if you are determined to do so, then you should call both clear() and resetRoot() before each parse.

      Since:
      1.7
    • cleanup

      protected void cleanup()

      Clean up allocated resources after parsing is complete. The default method closes input streams that have been created by Digester itself. If you override this method in a subclass, be sure to call super.cleanup() to invoke this logic.

      Since:
      1.8
    • configure

      protected void configure()

      Provide a hook for lazy configuration of this Digester instance. The default implementation does nothing, but subclasses can override as needed.

      Note This method may be called more than once. Once only initialization code should be placed in initialize() or the code should take responsibility by checking and setting the configured flag.

    • initialize

      protected void initialize()

      Provides a hook for lazy initialization of this Digester instance. The default implementation does nothing, but subclasses can override as needed. Digester (by default) only calls this method once.

      Note This method will be called by configure() only when the configured flag is false. Subclasses that override configure or who set configured may find that this method may be called more than once.

      Since:
      1.6
    • getRegistrations

      Map<String,URL> getRegistrations()
      Return the set of DTD URL registrations, keyed by public identifier.
    • getRules

      @Deprecated List<Rule> getRules(String match)
      Deprecated.
      Call match() on the Rules implementation returned by getRules()
      Return the set of rules that apply to the specified match position. The selected rules are those that match exactly, or those rules that specify a suffix match and the tail of the rule matches the current match position. Exact matches have precedence over suffix matches, then (among suffix matches) the longest match is preferred.
      Parameters:
      match - The current match position
    • peekParams

      public Object peekParams()

      Return the top object on the parameters stack without removing it. If there are no objects on the stack, return null.

      The parameters stack is used to store CallMethodRule parameters. See params.

    • peekParams

      public Object peekParams(int n)

      Return the n'th object down the parameters stack, where 0 is the top element and [getCount()-1] is the bottom element. If the specified index is out of range, return null.

      The parameters stack is used to store CallMethodRule parameters. See params.

      Parameters:
      n - Index of the desired element, where 0 is the top of the stack, 1 is the next element down, and so on.
    • popParams

      public Object popParams()

      Pop the top object off of the parameters stack, and return it. If there are no objects on the stack, return null.

      The parameters stack is used to store CallMethodRule parameters. See params.

    • pushParams

      public void pushParams(Object object)

      Push a new object onto the top of the parameters stack.

      The parameters stack is used to store CallMethodRule parameters. See params.

      Parameters:
      object - The new object
    • createSAXException

      public SAXException createSAXException(String message, Exception e)
      Create a SAX exception which also understands about the location in the digester file where the exception occurs
      Returns:
      the new exception
    • createSAXException

      public SAXException createSAXException(Exception e)
      Create a SAX exception which also understands about the location in the digester file where the exception occurs
      Returns:
      the new exception
    • createSAXException

      public SAXException createSAXException(String message)
      Create a SAX exception which also understands about the location in the digester file where the exception occurs
      Returns:
      the new exception