Module jdk.compiler

Package com.sun.source.tree

Interface LineMap

public interface LineMap

Provides methods to convert between character positions and line numbers for a compilation unit.

Since:

1.6

Method Summary

Modifier and Type	Method	Description
long	getColumnNumber(long pos)	Finds the column for a character position.
long	getLineNumber(long pos)	Finds the line containing a position; a line termination character is on the line it terminates.
long	getPosition(long line, long column)	Finds the position corresponding to a (line,column).
long	getStartPosition(long line)	Finds the start position of a line.

Method Details

getStartPosition

long getStartPosition(long line)

Finds the start position of a line.

Parameters:

line - line number (beginning at 1)

Returns:

position of first character in line

Throws:

IndexOutOfBoundsException - if lineNumber < 1 if lineNumber > no. of lines

getPosition

long getPosition(long line,
 long column)

Finds the position corresponding to a (line,column).

Parameters:

line - line number (beginning at 1)

column - tab-expanded column number (beginning 1)

Returns:

position of character

Throws:

IndexOutOfBoundsException - if line < 1 if line > no. of lines

getLineNumber

long getLineNumber(long pos)

Finds the line containing a position; a line termination character is on the line it terminates.

Parameters:

pos - character offset of the position

Returns:

the line number of pos (first line is 1)

getColumnNumber

long getColumnNumber(long pos)

Finds the column for a character position. Tab characters preceding the position on the same line will be expanded when calculating the column number.

Parameters:

pos - character offset of the position

Returns:

the tab-expanded column number of pos (first column is 1)