de.susebox.jtopas.spi

Class StandardWhitespaceHandler

java.lang.Object

de.susebox.jtopas.spi.StandardWhitespaceHandler

All Implemented Interfaces:

WhitespaceHandler

public class StandardWhitespaceHandler
extends java.lang.Object
implements WhitespaceHandler

Simple implementation of the WhitespaceHandler interface. This class works only with the TokenizerProperties interface methods and is aware of changes in these properties. It does not cache any information and is therefore a more or less slow way to handle whitespaces.

This class is a bridge between arbitrary Tokenizer implementations using the SPI interface WhitespaceHandler and any TokenizerProperties implementation that does not implement the WhitespaceHandler interface itself.

Author:

Heiko Blau

See Also:

WhitespaceHandler, Tokenizer, TokenizerProperties

Constructor Summary

Constructors

Constructor and Description
StandardWhitespaceHandler(TokenizerProperties props) The constructor takes the TokenizerProperties that provide the whitespaces.

Method Summary

Modifier and Type	Method and Description
int	countLeadingWhitespaces(DataProvider dataProvider) This method detects the number of whitespace characters the data range given through the DataProvider parameter starts with.
boolean	isWhitespace(char testChar) This method checks if the given character is a whitespace.
boolean	newlineIsWhitespace() If a Tokenizer performs line counting, it is often nessecary to know if newline characters is considered to be a whitespace.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardWhitespaceHandler

public StandardWhitespaceHandler(TokenizerProperties props)

The constructor takes the TokenizerProperties that provide the whitespaces.

Parameters:

props - the TokenizerProperties to take the whitespaces from

Method Detail

isWhitespace

public boolean isWhitespace(char testChar)

This method checks if the given character is a whitespace.

Specified by:

isWhitespace in interface WhitespaceHandler

Parameters:

testChar - check this character

Returns:

true if the given character is a whitespace, false otherwise

See Also:

TokenizerProperties.setWhitespaces(java.lang.String)

countLeadingWhitespaces

public int countLeadingWhitespaces(DataProvider dataProvider)
                            throws java.lang.NullPointerException

This method detects the number of whitespace characters the data range given through the DataProvider parameter starts with.

Specified by:

countLeadingWhitespaces in interface WhitespaceHandler

Parameters:

dataProvider - the source to get the data range from

Returns:

number of whitespace characters starting from the given offset

Throws:

java.lang.NullPointerException - if no DataProvider is given

See Also:

DataProvider

newlineIsWhitespace

public boolean newlineIsWhitespace()

If a Tokenizer performs line counting, it is often nessecary to know if newline characters is considered to be a whitespace. See WhitespaceHandler for details.

Specified by:

newlineIsWhitespace in interface WhitespaceHandler

Returns:

true if newline characters are in the current whitespace set, false otherwise