Package org.eclipse.jface.text.rules

Class BufferedRuleBasedScanner

java.lang.Object

org.eclipse.jface.text.rules.RuleBasedScanner

org.eclipse.jface.text.rules.BufferedRuleBasedScanner

All Implemented Interfaces:

ICharacterScanner, ITokenScanner

Direct Known Subclasses:

RuleBasedPartitionScanner

public class BufferedRuleBasedScanner
extends RuleBasedScanner

A buffered rule based scanner. The buffer always contains a section of a fixed size of the document to be scanned. Completely adheres to the contract of RuleBasedScanner.

Field Summary

Fields inherited from class org.eclipse.jface.text.rules.RuleBasedScanner

fColumn, fDefaultReturnToken, fDelimiters, fDocument, fOffset, fRangeEnd, fRules, fTokenOffset, UNDEFINED

Fields inherited from interface org.eclipse.jface.text.rules.ICharacterScanner

EOF

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BufferedRuleBasedScanner()	Creates a new buffered rule based scanner which does not have any rule and a default buffer size of 500 characters.
	BufferedRuleBasedScanner(int size)	Creates a new buffered rule based scanner which does not have any rule.

Method Summary

Modifier and Type	Method	Description
int	read()	Returns the next character or EOF if end of file has been reached
protected void	setBufferSize(int size)	Sets the buffer to the given number of characters.
void	setRange(IDocument document, int offset, int length)	Configures the scanner by providing access to the document range that should be scanned.
void	unread()	Rewinds the scanner before the last read character.

Methods inherited from class org.eclipse.jface.text.rules.RuleBasedScanner

getColumn, getLegalLineDelimiters, getTokenLength, getTokenOffset, nextToken, setDefaultReturnToken, setRules

Methods inherited from class java.lang.Object

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

Constructor Detail

BufferedRuleBasedScanner

protected BufferedRuleBasedScanner()

Creates a new buffered rule based scanner which does not have any rule and a default buffer size of 500 characters.

BufferedRuleBasedScanner

public BufferedRuleBasedScanner(int size)

Creates a new buffered rule based scanner which does not have any rule. The buffer size is set to the given number of characters.

Parameters:

size - the buffer size

Method Detail

setBufferSize

protected void setBufferSize(int size)

Sets the buffer to the given number of characters.

Parameters:

size - the buffer size

setRange

public void setRange(IDocument document,
                     int offset,
                     int length)

Description copied from interface: ITokenScanner

Configures the scanner by providing access to the document range that should be scanned.

Specified by:

setRange in interface ITokenScanner

Overrides:

setRange in class RuleBasedScanner

Parameters:

document - the document to scan

offset - the offset of the document range to scan

length - the length of the document range to scan

read

public int read()

Description copied from interface: ICharacterScanner

Returns the next character or EOF if end of file has been reached

Specified by:

read in interface ICharacterScanner

Overrides:

read in class RuleBasedScanner

Returns:

the next character or EOF

unread

public void unread()

Description copied from interface: ICharacterScanner

Rewinds the scanner before the last read character.

Specified by:

unread in interface ICharacterScanner

Overrides:

unread in class RuleBasedScanner