Package net.sf.saxon.regex
Class EmptyString
java.lang.Object
net.sf.saxon.regex.UnicodeString
net.sf.saxon.regex.EmptyString
- All Implemented Interfaces:
CharSequence,Comparable<UnicodeString>,AtomicMatchKey
An implementation of UnicodeString representing a zero-length string. This
is a singleton class with only one instance.
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Field Summary
FieldsFields inherited from interface net.sf.saxon.expr.sort.AtomicMatchKey
NaN_MATCH_KEY -
Method Summary
Modifier and TypeMethodDescriptioncharcharAt(int index) booleanisEnd(int pos) Ask whether a given position is at (or beyond) the end of the stringintlength()subSequence(int start, int end) toString()intuCharAt(int pos) Get the character at a specified positionintuIndexOf(int search, int pos) Get the first match for a given characterintuLength()Get the length of the string, in Unicode codepointsuSubstring(int beginIndex, int endIndex) Get a substring of this stringMethods inherited from class net.sf.saxon.regex.UnicodeString
asAtomic, compareTo, containsSurrogatePairs, equals, hashCode, makeUnicodeString, makeUnicodeStringMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface java.lang.CharSequence
chars, codePoints, isEmpty
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Field Details
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THE_INSTANCE
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Method Details
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uSubstring
Description copied from class:UnicodeStringGet a substring of this string- Specified by:
uSubstringin classUnicodeString- Parameters:
beginIndex- the index of the first character to be included (counting codepoints, not 16-bit characters)endIndex- the index of the first character to be NOT included (counting codepoints, not 16-bit characters)- Returns:
- a substring
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uCharAt
public int uCharAt(int pos) Description copied from class:UnicodeStringGet the character at a specified position- Specified by:
uCharAtin classUnicodeString- Parameters:
pos- the index of the required character (counting codepoints, not 16-bit characters)- Returns:
- a character (Unicode codepoint) at the specified position.
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uIndexOf
public int uIndexOf(int search, int pos) Description copied from class:UnicodeStringGet the first match for a given character- Specified by:
uIndexOfin classUnicodeString- Parameters:
search- the character to look forpos- the first position to look- Returns:
- the position of the first occurrence of the sought character, or -1 if not found
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uLength
public int uLength()Description copied from class:UnicodeStringGet the length of the string, in Unicode codepoints- Specified by:
uLengthin classUnicodeString- Returns:
- the number of codepoints in the string
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isEnd
public boolean isEnd(int pos) Description copied from class:UnicodeStringAsk whether a given position is at (or beyond) the end of the string- Specified by:
isEndin classUnicodeString- Parameters:
pos- the index of the required character (counting codepoints, not 16-bit characters)- Returns:
- true iff if the specified index is after the end of the character stream
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toString
- Specified by:
toStringin interfaceCharSequence- Overrides:
toStringin classObject
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length
public int length() -
charAt
public char charAt(int index) -
subSequence
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