Package org.pipservices3.expressions.tokenizers.generic

Class GenericWhitespaceState

java.lang.Object

org.pipservices3.expressions.tokenizers.generic.GenericWhitespaceState

All Implemented Interfaces:

ITokenizerState, IWhitespaceState

public class GenericWhitespaceState
extends Object
implements IWhitespaceState

A whitespace state ignores whitespace (such as blanks and tabs), and returns the tokenizer's next token. By default, all characters from 0 to 32 are whitespace.

Constructor Summary

Constructors

Constructor	Description
GenericWhitespaceState()	Constructs a whitespace state with a default idea of what characters are, in fact, whitespace.

Method Summary

Modifier and Type	Method	Description
void	clearWhitespaceChars()	Clears definitions of whitespace characters.
Token	nextToken(IScanner scanner, ITokenizer tokenizer)	Ignore whitespace (such as blanks and tabs), and return the tokenizer's next token.
void	setWhitespaceChars(int fromSymbol, int toSymbol, boolean enable)	Establish the given characters as whitespace to ignore.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericWhitespaceState

public GenericWhitespaceState()
                       throws Exception

Constructs a whitespace state with a default idea of what characters are, in fact, whitespace.

Throws:

Exception

Method Detail

nextToken

public Token nextToken(IScanner scanner,
                       ITokenizer tokenizer)
                throws Exception

Ignore whitespace (such as blanks and tabs), and return the tokenizer's next token.

Specified by:

nextToken in interface ITokenizerState

Parameters:

scanner - A textual string to be tokenized.

tokenizer - A tokenizer class that controls the process.

Returns:

The next token from the top of the stream.

Throws:

Exception

setWhitespaceChars

public void setWhitespaceChars(int fromSymbol,
                               int toSymbol,
                               boolean enable)
                        throws Exception

Establish the given characters as whitespace to ignore.

Specified by:

setWhitespaceChars in interface IWhitespaceState

Parameters:

fromSymbol - First character index of the interval.

toSymbol - Last character index of the interval.

enable - true if this state should ignore characters in the given range.

Throws:

Exception

clearWhitespaceChars

public void clearWhitespaceChars()

Clears definitions of whitespace characters.

Specified by:

clearWhitespaceChars in interface IWhitespaceState