public class DefaultPositionMap extends java.lang.Object implements PositionMap, java.io.Serializable
This class internally keeps a cache of the positions of all the line break characters scanned so far, therefore repeated position lookup can be done in amortized log(n) time.
Constructor and Description |
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DefaultPositionMap(java.lang.CharSequence src,
int lno,
int cno)
Create a DefaultPositionMap object.
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DefaultPositionMap(java.lang.CharSequence src,
int lno,
int cno,
char line_break)
Create a DefaultPositionMap object.
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public DefaultPositionMap(java.lang.CharSequence src, int lno, int cno, char line_break)
src
- the source.lno
- the starting line number.cno
- the starting column number.line_break
- the line break character.public DefaultPositionMap(java.lang.CharSequence src, int lno, int cno)
src
- the source.lno
- the starting line number.cno
- the starting column number.public Pos getPos(int n)
PositionMap
getPos
in interface PositionMap
n
- the offset in the source, starting from 0.