eu.slipo.athenarc.triplegeo.expression

Class TokenStream

java.lang.Object

eu.slipo.athenarc.triplegeo.expression.TokenStream

public class TokenStream
extends java.lang.Object

Recognizes the type of the input tokens recognized in a logical expression.

Version:

2.0

Author:

Kostas Patroumpas

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	offset
(package private) java.util.List<Token>	tokens

Constructor Summary

Constructors

Constructor and Description
TokenStream(java.util.List<Token> tokens) Constructor or the class.

Method Summary

Modifier and Type	Method and Description
Token	consume(TokenType type) Consumes next token of the given type.
Token	consumeIf(TokenType type) Consumes token of given type; it pauses and does not consume the rest if type differs.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

tokens

final java.util.List<Token> tokens

offset

int offset

Constructor Detail

TokenStream

public TokenStream(java.util.List<Token> tokens)

Constructor or the class.

Parameters:

tokens - The list of recognized tokens.

Method Detail

consume

public Token consume(TokenType type)
              throws java.text.ParseException

Consumes next token of the given type.

Parameters:

type - The type of the token to consume.

Returns:

The recognized token.

Throws:

java.text.ParseException - Throws exception if type differs.

consumeIf

public Token consumeIf(TokenType type)

Consumes token of given type; it pauses and does not consume the rest if type differs.

Parameters:

type - The type of the token to consume.

Returns:

The recognized token.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object