groovy.io

Class LineColumnReader

java.lang.Object

java.io.Reader

java.io.BufferedReader

groovy.io.LineColumnReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class LineColumnReader
extends BufferedReader

The LineColumnReader is an extension to BufferedReader that keeps track of the line and column information of where the cursor is.

Since:

1.8.0

Author:

Guillaume Laforge

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
LineColumnReader(Reader reader) Constructor wrapping a Reader (FileReader, FileReader, InputStreamReader, etc.)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the stream and releases any system resources associated with it.
long	getColumn()
long	getColumnMark()
long	getLine()
long	getLineMark()
void	mark(int readAheadLimit) Marks the present position in the stream.
int	read() Reads a single character.
int	read(char[] chars) Reads characters into an array.
int	read(char[] chars, int startOffset, int length) Reads characters into a portion of an array.
int	read(CharBuffer buffer) Not implemented.
String	readLine() Reads a line of text.
void	reset() Resets the stream to the most recent mark.
void	setColumn(long column)
void	setColumnMark(long columnMark)
void	setLine(long line)
void	setLineMark(long lineMark)
long	skip(long toSkip) Skips characters.

Methods inherited from class java.io.BufferedReader

markSupported, ready

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LineColumnReader

public LineColumnReader(Reader reader)

Constructor wrapping a Reader (FileReader, FileReader, InputStreamReader, etc.)

Parameters:

reader - the reader to wrap

Method Detail

mark

public void mark(int readAheadLimit)
          throws IOException

Marks the present position in the stream. Subsequent calls to reset() will attempt to reposition the stream to this point.

Overrides:

mark in class BufferedReader

Parameters:

readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. An attempt to reset the stream after reading characters up to this limit or beyond may fail. A limit value larger than the size of the input buffer will cause a new buffer to be allocated whose size is no smaller than limit. Therefore large values should be used with care.

Throws:

IOException

reset

public void reset()
           throws IOException

Resets the stream to the most recent mark.

Overrides:

reset in class BufferedReader

Throws:

IOException

read

public int read()
         throws IOException

Reads a single character.

Overrides:

read in class BufferedReader

Returns:

The character read, as an integer in the range 0 to 65535 (0x00-0xffff), or -1 if the end of the stream has been reached

Throws:

IOException

read

public int read(char[] chars,
       int startOffset,
       int length)
         throws IOException

Reads characters into a portion of an array.

Overrides:

read in class BufferedReader

Parameters:

chars - Destination array of char

startOffset - Offset at which to start storing characters

length - Maximum number of characters to read

Returns:

an exception if an error occurs

Throws:

IOException

readLine

public String readLine()
                throws IOException

Reads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.

Overrides:

readLine in class BufferedReader

Returns:

A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached

Throws:

IOException

skip

public long skip(long toSkip)
          throws IOException

Skips characters.

Overrides:

skip in class BufferedReader

Parameters:

toSkip - the number of characters to skip

Returns:

The number of characters actually skipped

Throws:

IOException

read

public int read(char[] chars)
         throws IOException

Reads characters into an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.

Overrides:

read in class Reader

Parameters:

chars - Destination buffer

Returns:

The number of characters read, or -1 if the end of the stream has been reached

Throws:

IOException

read

public int read(CharBuffer buffer)

Not implemented.

Specified by:

read in interface Readable

Overrides:

read in class Reader

Parameters:

buffer - Destination buffer

Returns:

The number of characters read, or -1 if the end of the stream has been reached

Throws:

UnsupportedOperationException - as the method is not implemented

close

public void close()
           throws IOException

Closes the stream and releases any system resources associated with it. Once the stream has been closed, further read(), ready(), mark(), reset(), or skip() invocations will throw an IOException. Closing a previously closed stream has no effect.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class BufferedReader

Throws:

IOException

getColumn

public long getColumn()

setColumn

public void setColumn(long column)

getColumnMark

public long getColumnMark()

setColumnMark

public void setColumnMark(long columnMark)

getLine

public long getLine()

setLine

public void setLine(long line)

getLineMark

public long getLineMark()

setLineMark

public void setLineMark(long lineMark)