Package com.ibm.icu.impl.coll
Class FCDIterCollationIterator
java.lang.Object
com.ibm.icu.impl.coll.CollationIterator
com.ibm.icu.impl.coll.IterCollationIterator
com.ibm.icu.impl.coll.FCDIterCollationIterator
Incrementally checks the input text for FCD and normalizes where necessary.
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Nested Class Summary
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate int
private final Normalizer2Impl
private StringBuilder
private int
private StringBuilder
private int
private FCDIterCollationIterator.State
Fields inherited from class com.ibm.icu.impl.coll.IterCollationIterator
iter
Fields inherited from class com.ibm.icu.impl.coll.CollationIterator
data, NO_CP_AND_CE32, trie
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Constructor Summary
ConstructorsConstructorDescriptionFCDIterCollationIterator
(CollationData data, boolean numeric, UCharacterIterator ui, int startIndex) -
Method Summary
Modifier and TypeMethodDescriptionprotected void
backwardNumCodePoints
(int num) protected void
forwardNumCodePoints
(int num) int
protected char
Called when handleNextCE32() returns a LEAD_SURROGATE_TAG for a lead surrogate code unit.protected long
Returns the next code point and its local CE32 value.int
Returns the next code point (with post-increment).private boolean
Extends the FCD text segment forward or normalizes around pos.private void
int
Returns the previous code point (with pre-decrement).private boolean
Extends the FCD text segment backward or normalizes around pos.void
resetToOffset
(int newOffset) Resets the iterator state and sets the position to the specified offset.private void
Switches to backward checking.private void
Switches to forward checking if possible.Methods inherited from class com.ibm.icu.impl.coll.CollationIterator
appendCEsFromCE32, clearCEs, clearCEsIfNoneRemaining, equals, fetchCEs, forbidSurrogateCodePoints, getCE, getCE32FromBuilderData, getCEs, getCEsLength, getDataCE32, hashCode, isLeadSurrogate, isTrailSurrogate, makeCodePointAndCE32Pair, nextCE, previousCE, reset, reset, setCurrentCE
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Field Details
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state
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start
private int start -
pos
private int pos -
limit
private int limit -
nfcImpl
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s
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normalized
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Constructor Details
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FCDIterCollationIterator
public FCDIterCollationIterator(CollationData data, boolean numeric, UCharacterIterator ui, int startIndex)
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Method Details
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resetToOffset
public void resetToOffset(int newOffset) Description copied from class:CollationIterator
Resets the iterator state and sets the position to the specified offset. Subclasses must implement, and must call the parent class method, or CollationIterator.reset().- Overrides:
resetToOffset
in classIterCollationIterator
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getOffset
public int getOffset()- Overrides:
getOffset
in classIterCollationIterator
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nextCodePoint
public int nextCodePoint()Description copied from class:CollationIterator
Returns the next code point (with post-increment). Public for identical-level comparison and for testing.- Overrides:
nextCodePoint
in classIterCollationIterator
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previousCodePoint
public int previousCodePoint()Description copied from class:CollationIterator
Returns the previous code point (with pre-decrement). Public for identical-level comparison and for testing.- Overrides:
previousCodePoint
in classIterCollationIterator
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handleNextCE32
protected long handleNextCE32()Description copied from class:CollationIterator
Returns the next code point and its local CE32 value. Returns Collation.FALLBACK_CE32 at the end of the text (c<0) or when c's CE32 value is to be looked up in the base data (fallback). The code point is used for fallbacks, context and implicit weights. It is ignored when the returned CE32 is not special (e.g., FFFD_CE32). Returns the code point in bits 63..32 (signed) and the CE32 in bits 31..0.- Overrides:
handleNextCE32
in classIterCollationIterator
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handleGetTrailSurrogate
protected char handleGetTrailSurrogate()Description copied from class:CollationIterator
Called when handleNextCE32() returns a LEAD_SURROGATE_TAG for a lead surrogate code unit. Returns the trail surrogate in that case and advances past it, if a trail surrogate follows the lead surrogate. Otherwise returns any other code unit and does not advance.- Overrides:
handleGetTrailSurrogate
in classIterCollationIterator
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forwardNumCodePoints
protected void forwardNumCodePoints(int num) - Overrides:
forwardNumCodePoints
in classIterCollationIterator
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backwardNumCodePoints
protected void backwardNumCodePoints(int num) - Overrides:
backwardNumCodePoints
in classIterCollationIterator
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switchToForward
private void switchToForward()Switches to forward checking if possible. -
nextSegment
private boolean nextSegment()Extends the FCD text segment forward or normalizes around pos.- Returns:
- true if success
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switchToBackward
private void switchToBackward()Switches to backward checking. -
previousSegment
private boolean previousSegment()Extends the FCD text segment backward or normalizes around pos.- Returns:
- true if success
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normalize
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