Package javassist.bytecode
Class CodeAttribute
- java.lang.Object
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- javassist.bytecode.AttributeInfo
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- javassist.bytecode.CodeAttribute
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- All Implemented Interfaces:
Opcode
public class CodeAttribute extends AttributeInfo implements Opcode
Code_attribute
.To browse the
code
field of aCode_attribute
structure, useCodeIterator
.- See Also:
CodeIterator
,iterator()
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Nested Class Summary
Nested Classes Modifier and Type Class Description (package private) static class
CodeAttribute.LdcEntry
static class
CodeAttribute.RuntimeCopyException
An exception that may be thrown bycopy()
inCodeAttribute
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Field Summary
Fields Modifier and Type Field Description private java.util.ArrayList
attributes
private ExceptionTable
exceptions
private int
maxLocals
private int
maxStack
static java.lang.String
tag
The name of this attribute"Code"
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Fields inherited from class javassist.bytecode.AttributeInfo
constPool, info, name
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Fields inherited from interface javassist.bytecode.Opcode
AALOAD, AASTORE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3, DMUL, DNEG, DREM, DRETURN, DSTORE, DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3, FMUL, FNEG, FREM, FRETURN, FSTORE, FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3, FSUB, GETFIELD, GETSTATIC, GOTO, GOTO_W, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3, IMUL, INEG, INSTANCEOF, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3, ISUB, IUSHR, IXOR, JSR, JSR_W, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDC_W, LDC2_W, LDIV, LLOAD, LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, STACK_GROW, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, WIDE
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Constructor Summary
Constructors Modifier Constructor Description CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, ExceptionTable etable)
Constructs aCode_attribute
.(package private)
CodeAttribute(ConstPool cp, int name_id, java.io.DataInputStream in)
private
CodeAttribute(ConstPool cp, CodeAttribute src, java.util.Map classnames)
Constructs a copy ofCode_attribute
.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description int
computeMaxStack()
Computes the maximum stack size and setsmax_stack
to the computed size.AttributeInfo
copy(ConstPool newCp, java.util.Map classnames)
Makes a copy.private static CodeAttribute.LdcEntry
copyCode(byte[] code, int beginPos, int endPos, ConstPool srcCp, byte[] newcode, ConstPool destCp, java.util.Map classnameMap)
private byte[]
copyCode(ConstPool destCp, java.util.Map classnames, ExceptionTable etable, CodeAttribute destCa)
Copies code.private static void
copyConstPoolInfo(int i, byte[] code, ConstPool srcCp, byte[] newcode, ConstPool destCp, java.util.Map classnameMap)
byte[]
get()
This method is not available.AttributeInfo
getAttribute(java.lang.String name)
Returns the attribute with the specified name.java.util.List
getAttributes()
Returnsattributes[]
.byte[]
getCode()
Returnscode[]
.int
getCodeLength()
Returnscode_length
.java.lang.String
getDeclaringClass()
Returns the name of the class declaring the method including this code attribute.ExceptionTable
getExceptionTable()
Returnsexception_table[]
.int
getMaxLocals()
Returnsmax_locals
.int
getMaxStack()
Returnsmax_stack
.(package private) void
getRefClasses(java.util.Map classnames)
void
insertLocalVar(int where, int size)
Changes the index numbers of the local variables to append a new parameter.CodeIterator
iterator()
Makes a new iterator for reading this code attribute.int
length()
Returns the length of thisattribute_info
structure.(package private) void
renameClass(java.lang.String oldname, java.lang.String newname)
(package private) void
renameClass(java.util.Map classnames)
void
set(byte[] newinfo)
This method is not available.void
setAttribute(StackMap sm)
Adds a stack map table for J2ME (CLDC).void
setAttribute(StackMapTable smt)
Adds a stack map table.(package private) void
setCode(byte[] newinfo)
Setscode[]
.void
setMaxLocals(int value)
Setsmax_locals
.void
setMaxStack(int value)
Setsmax_stack
.private static void
shiftIndex(CodeIterator ci, int lessThan, int delta)
private static void
shiftIndex0(CodeIterator ci, int index, int opcode, int lessThan, int delta, int opcode_i_0, int opcode_i)
private static void
shiftIndex8(CodeIterator ci, int index, int opcode, int lessThan, int delta)
(package private) void
write(java.io.DataOutputStream out)
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Methods inherited from class javassist.bytecode.AttributeInfo
copyAll, getConstPool, getLength, getName, getRefClasses, lookup, read, remove, renameClass, renameClass, writeAll
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Field Detail
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tag
public static final java.lang.String tag
The name of this attribute"Code"
.- See Also:
- Constant Field Values
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maxStack
private int maxStack
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maxLocals
private int maxLocals
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exceptions
private ExceptionTable exceptions
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attributes
private java.util.ArrayList attributes
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Constructor Detail
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CodeAttribute
public CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, ExceptionTable etable)
Constructs aCode_attribute
.- Parameters:
cp
- constant pool tablestack
-max_stack
locals
-max_locals
code
-code[]
etable
-exception_table[]
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CodeAttribute
private CodeAttribute(ConstPool cp, CodeAttribute src, java.util.Map classnames) throws BadBytecode
Constructs a copy ofCode_attribute
. Specified class names are replaced during the copy.- Parameters:
cp
- constant pool table.src
- source Code attribute.classnames
- pairs of replaced and substituted class names.- Throws:
BadBytecode
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CodeAttribute
CodeAttribute(ConstPool cp, int name_id, java.io.DataInputStream in) throws java.io.IOException
- Throws:
java.io.IOException
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Method Detail
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copy
public AttributeInfo copy(ConstPool newCp, java.util.Map classnames) throws CodeAttribute.RuntimeCopyException
Makes a copy. Class names are replaced according to the givenMap
object.- Overrides:
copy
in classAttributeInfo
- Parameters:
newCp
- the constant pool table used by the new copy.classnames
- pairs of replaced and substituted class names.- Returns:
CodeAttribute
object.- Throws:
CodeAttribute.RuntimeCopyException
- if aBadBytecode
exception is thrown, it is converted intoRuntimeCopyException
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length
public int length()
Returns the length of thisattribute_info
structure. The returned value isattribute_length + 6
.- Overrides:
length
in classAttributeInfo
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write
void write(java.io.DataOutputStream out) throws java.io.IOException
- Overrides:
write
in classAttributeInfo
- Throws:
java.io.IOException
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get
public byte[] get()
This method is not available.- Overrides:
get
in classAttributeInfo
- Throws:
java.lang.UnsupportedOperationException
- always thrown.
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set
public void set(byte[] newinfo)
This method is not available.- Overrides:
set
in classAttributeInfo
- Throws:
java.lang.UnsupportedOperationException
- always thrown.
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renameClass
void renameClass(java.lang.String oldname, java.lang.String newname)
- Overrides:
renameClass
in classAttributeInfo
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renameClass
void renameClass(java.util.Map classnames)
- Overrides:
renameClass
in classAttributeInfo
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getRefClasses
void getRefClasses(java.util.Map classnames)
- Overrides:
getRefClasses
in classAttributeInfo
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getDeclaringClass
public java.lang.String getDeclaringClass()
Returns the name of the class declaring the method including this code attribute.
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getMaxStack
public int getMaxStack()
Returnsmax_stack
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setMaxStack
public void setMaxStack(int value)
Setsmax_stack
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computeMaxStack
public int computeMaxStack() throws BadBytecode
Computes the maximum stack size and setsmax_stack
to the computed size.- Returns:
- the newly computed value of
max_stack
- Throws:
BadBytecode
- if this method fails in computing.
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getMaxLocals
public int getMaxLocals()
Returnsmax_locals
.
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setMaxLocals
public void setMaxLocals(int value)
Setsmax_locals
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getCodeLength
public int getCodeLength()
Returnscode_length
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getCode
public byte[] getCode()
Returnscode[]
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setCode
void setCode(byte[] newinfo)
Setscode[]
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iterator
public CodeIterator iterator()
Makes a new iterator for reading this code attribute.
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getExceptionTable
public ExceptionTable getExceptionTable()
Returnsexception_table[]
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getAttributes
public java.util.List getAttributes()
Returnsattributes[]
. It returns a list ofAttributeInfo
. A new element can be added to the returned list and an existing element can be removed from the list.- See Also:
AttributeInfo
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getAttribute
public AttributeInfo getAttribute(java.lang.String name)
Returns the attribute with the specified name. If it is not found, this method returns null.- Parameters:
name
- attribute name- Returns:
- an
AttributeInfo
object or null.
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setAttribute
public void setAttribute(StackMapTable smt)
Adds a stack map table. If another copy of stack map table is already contained, the old one is removed.- Parameters:
smt
- the stack map table added to this code attribute. If it is null, a new stack map is not added. Only the old stack map is removed.
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setAttribute
public void setAttribute(StackMap sm)
Adds a stack map table for J2ME (CLDC). If another copy of stack map table is already contained, the old one is removed.- Parameters:
sm
- the stack map table added to this code attribute. If it is null, a new stack map is not added. Only the old stack map is removed.- Since:
- 3.12
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copyCode
private byte[] copyCode(ConstPool destCp, java.util.Map classnames, ExceptionTable etable, CodeAttribute destCa) throws BadBytecode
Copies code.- Throws:
BadBytecode
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copyCode
private static CodeAttribute.LdcEntry copyCode(byte[] code, int beginPos, int endPos, ConstPool srcCp, byte[] newcode, ConstPool destCp, java.util.Map classnameMap) throws BadBytecode
- Throws:
BadBytecode
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copyConstPoolInfo
private static void copyConstPoolInfo(int i, byte[] code, ConstPool srcCp, byte[] newcode, ConstPool destCp, java.util.Map classnameMap)
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insertLocalVar
public void insertLocalVar(int where, int size) throws BadBytecode
Changes the index numbers of the local variables to append a new parameter. This method does not updateLocalVariableAttribute
,LocalVariableTypeAttribute
,StackMapTable
, orStackMap
. These attributes must be explicitly updated.- Parameters:
where
- the index of the new parameter.size
- the type size of the new parameter (1 or 2).- Throws:
BadBytecode
- See Also:
LocalVariableAttribute.shiftIndex(int, int)
,LocalVariableAttribute.shiftIndex(int, int)
,StackMapTable.insertLocal(int, int, int)
,StackMap.insertLocal(int, int, int)
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shiftIndex
private static void shiftIndex(CodeIterator ci, int lessThan, int delta) throws BadBytecode
- Parameters:
lessThan
- If the index of the local variable is less than this value, it does not change. Otherwise, the index is increased.delta
- the indexes of the local variables are increased by this value.- Throws:
BadBytecode
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shiftIndex8
private static void shiftIndex8(CodeIterator ci, int index, int opcode, int lessThan, int delta) throws BadBytecode
- Throws:
BadBytecode
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shiftIndex0
private static void shiftIndex0(CodeIterator ci, int index, int opcode, int lessThan, int delta, int opcode_i_0, int opcode_i) throws BadBytecode
- Throws:
BadBytecode
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