webwork.expr

Class Parser

java.lang.Object

webwork.expr.Parser

All Implemented Interfaces:

ParserConstants

public final class Parser
extends Object
implements ParserConstants

The WebWork Expression language Parser and Interpreter.

Version:

$Revision: 1.21 $

Author:

Maurice C. Parker (maurice@vineyardenterprise.com)

Field Summary

Fields

Modifier and Type	Field and Description
Token	jj_nt Next token.
protected static org.apache.commons.logging.Log	log
Token	token Current token.
ParserTokenManager	token_source Generated Token Manager.

Fields inherited from interface webwork.expr.ParserConstants

AND, DEFAULT, EOF, EQ, GE, GT, ID, LE, LPAREN, LT, NE, OR, RPAREN, STRING_LITERAL, tokenImage

Constructor Summary

Constructors

Constructor and Description
Parser(InputStream stream) Constructor with InputStream.
Parser(InputStream stream, String encoding) Constructor with InputStream and supplied encoding
Parser(ParserTokenManager tm) Constructor with generated Token Manager.
Parser(Reader stream) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	comparative_expression()
void	disable_tracing() Disable tracing.
void	enable_tracing() Enable tracing.
Object	findValue()
ParseException	generateParseException() Generate ParseException.
Token	getNextToken() Get the next Token.
Token	getToken(int index) Get the specific Token.
boolean	logical_and_expression()
void	ReInit(InputStream stream) Reinitialise.
void	ReInit(InputStream stream, String encoding) Reinitialise.
void	ReInit(ParserTokenManager tm) Reinitialise.
void	ReInit(Reader stream) Reinitialise.
void	setValueStack(ValueStack valueStack) Set the value stack
boolean	test()

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static org.apache.commons.logging.Log log

token_source

public ParserTokenManager token_source

Generated Token Manager.

token

public Token token

Current token.

jj_nt

public Token jj_nt

Next token.

Constructor Detail

Parser

public Parser(InputStream stream)

Constructor with InputStream.

Parser

public Parser(InputStream stream,
      String encoding)

Constructor with InputStream and supplied encoding

Parser

public Parser(Reader stream)

Constructor.

Parser

public Parser(ParserTokenManager tm)

Constructor with generated Token Manager.

Method Detail

setValueStack

public void setValueStack(ValueStack valueStack)

Set the value stack

test

public final boolean test()
                   throws ParseException

Throws:

ParseException

logical_and_expression

public final boolean logical_and_expression()
                                     throws ParseException

Throws:

ParseException

comparative_expression

public final boolean comparative_expression()
                                     throws ParseException

Throws:

ParseException

findValue

public final Object findValue()
                       throws ParseException

Throws:

ParseException

ReInit

public void ReInit(InputStream stream)

Reinitialise.

ReInit

public void ReInit(InputStream stream,
          String encoding)

Reinitialise.

ReInit

public void ReInit(Reader stream)

Reinitialise.

ReInit

public void ReInit(ParserTokenManager tm)

Reinitialise.

getNextToken

public final Token getNextToken()

Get the next Token.

getToken

public final Token getToken(int index)

Get the specific Token.

generateParseException

public ParseException generateParseException()

Generate ParseException.

enable_tracing

public final void enable_tracing()

Enable tracing.

disable_tracing

public final void disable_tracing()

Disable tracing.