Package gnu.regexp
Class CharIndexedStringBuffer
- java.lang.Object
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- gnu.regexp.CharIndexedStringBuffer
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- All Implemented Interfaces:
CharIndexed
,java.io.Serializable
class CharIndexedStringBuffer extends java.lang.Object implements CharIndexed, java.io.Serializable
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Field Summary
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Fields inherited from interface gnu.regexp.CharIndexed
OUT_OF_BOUNDS
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Constructor Summary
Constructors Constructor Description CharIndexedStringBuffer(java.lang.StringBuffer str, int index)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description char
charAt(int index)
Returns the character at the given offset past the current cursor position in the input.boolean
isValid()
Returns true if the most recent move() operation placed the cursor position at a valid position in the input.boolean
move(int index)
Shifts the input buffer by a given number of positions.
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Method Detail
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charAt
public char charAt(int index)
Description copied from interface:CharIndexed
Returns the character at the given offset past the current cursor position in the input. The index of the current position is zero. It is possible for this method to be called with a negative index. This happens when using the '^' operator in multiline matching mode or the '\b' or '\<' word boundary operators. In any case, the lower bound is currently fixed at -2 (for '^' with a two-character newline).- Specified by:
charAt
in interfaceCharIndexed
- Parameters:
index
- the offset position in the character field to examine- Returns:
- the character at the specified index, or the OUT_OF_BOUNDS character defined by this interface.
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isValid
public boolean isValid()
Description copied from interface:CharIndexed
Returns true if the most recent move() operation placed the cursor position at a valid position in the input.- Specified by:
isValid
in interfaceCharIndexed
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move
public boolean move(int index)
Description copied from interface:CharIndexed
Shifts the input buffer by a given number of positions. Returns true if the new cursor position is valid.- Specified by:
move
in interfaceCharIndexed
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