Package com.ibm.icu.impl.number.parse
Class SymbolMatcher
- java.lang.Object
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- com.ibm.icu.impl.number.parse.SymbolMatcher
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- All Implemented Interfaces:
NumberParseMatcher
- Direct Known Subclasses:
IgnorablesMatcher
,InfinityMatcher
,MinusSignMatcher
,NanMatcher
,PaddingMatcher
,PercentMatcher
,PermilleMatcher
,PlusSignMatcher
public abstract class SymbolMatcher extends java.lang.Object implements NumberParseMatcher
A base class for many matchers that performs a simple match against a UnicodeString and/or UnicodeSet.
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Nested Class Summary
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Nested classes/interfaces inherited from interface com.ibm.icu.impl.number.parse.NumberParseMatcher
NumberParseMatcher.Flexible
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Field Summary
Fields Modifier and Type Field Description protected java.lang.String
string
protected UnicodeSet
uniSet
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Constructor Summary
Constructors Modifier Constructor Description protected
SymbolMatcher(StaticUnicodeSets.Key key)
protected
SymbolMatcher(java.lang.String symbolString, UnicodeSet symbolUniSet)
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected abstract void
accept(StringSegment segment, ParsedNumber result)
UnicodeSet
getSet()
protected abstract boolean
isDisabled(ParsedNumber result)
boolean
match(StringSegment segment, ParsedNumber result)
Runs this matcher starting at the beginning of the given StringSegment.void
postProcess(ParsedNumber result)
Method called at the end of a parse, after all matchers have failed to consume any more chars.boolean
smokeTest(StringSegment segment)
Performs a fast "smoke check" for whether or not this matcher could possibly match against the given string segment.
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Field Detail
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string
protected final java.lang.String string
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uniSet
protected final UnicodeSet uniSet
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Constructor Detail
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SymbolMatcher
protected SymbolMatcher(java.lang.String symbolString, UnicodeSet symbolUniSet)
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SymbolMatcher
protected SymbolMatcher(StaticUnicodeSets.Key key)
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Method Detail
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getSet
public UnicodeSet getSet()
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match
public boolean match(StringSegment segment, ParsedNumber result)
Description copied from interface:NumberParseMatcher
Runs this matcher starting at the beginning of the given StringSegment. If this matcher finds something interesting in the StringSegment, it should update the offset of the StringSegment corresponding to how many chars were matched.- Specified by:
match
in interfaceNumberParseMatcher
- Parameters:
segment
- The StringSegment to match against. Matches always start at the beginning of the segment. The segment is guaranteed to contain at least one char.result
- The data structure to store results if the match succeeds.- Returns:
- Whether this matcher thinks there may be more interesting chars beyond the end of the string segment.
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smokeTest
public boolean smokeTest(StringSegment segment)
Description copied from interface:NumberParseMatcher
Performs a fast "smoke check" for whether or not this matcher could possibly match against the given string segment. The test should be as fast as possible but also as restrictive as possible. For example, matchers can maintain a UnicodeSet of all code points that count possibly start a match. Matchers should use theStringSegment.startsWith(int)
method in order to correctly handle case folding.- Specified by:
smokeTest
in interfaceNumberParseMatcher
- Parameters:
segment
- The segment to check against.- Returns:
- true if the matcher might be able to match against this segment; false if it definitely will not be able to match.
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postProcess
public void postProcess(ParsedNumber result)
Description copied from interface:NumberParseMatcher
Method called at the end of a parse, after all matchers have failed to consume any more chars. Allows a matcher to make final modifications to the result given the knowledge that no more matches are possible.- Specified by:
postProcess
in interfaceNumberParseMatcher
- Parameters:
result
- The data structure to store results.
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isDisabled
protected abstract boolean isDisabled(ParsedNumber result)
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accept
protected abstract void accept(StringSegment segment, ParsedNumber result)
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