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jpicedt.graphic.io.parser
Class OptionalExpression  

java.lang.Object
  jpicedt.graphic.io.parser.AbstractRegularExpression
      jpicedt.graphic.io.parser.OptionalExpression

All Implemented Interfaces:

ExpressionConstants

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public class OptionalExpression

extends AbstractRegularExpression

an expression that represents a pattern repeating at most once

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Field Summary
private  AbstractRegularExpression	expr

 

Fields inherited from interface jpicedt.graphic.io.parser.ExpressionConstants

ANY_CHAR, ANY_CHAR_EOL, ANY_SIGN, AT_LEAST, AT_MOST, DEBUG, DOUBLE, EOL, EXACTLY, INTEGER, NEGATIVE, NON_NULL, POSITIVE, STRICTLY_NEGATIVE, STRICTLY_POSITIVE, WHITE_SPACES, WHITE_SPACES_OR_EOL

 

Constructor Summary

OptionalExpression(AbstractRegularExpression expr)           the expression to be matched (yet optionally)

 

Method Summary
boolean	interpret(Context c)           Parses this expression, possibly using Context to fetch the String to interpret if this Expression is a leaf expression.
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class jpicedt.graphic.io.parser.AbstractRegularExpression

action

 

Methods inherited from class java.lang.Object

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

 

Field Detail

expr

private AbstractRegularExpression expr

Constructor Detail

OptionalExpression

public OptionalExpression(AbstractRegularExpression expr)

the expression to be matched (yet optionally)

Method Detail

interpret

public boolean interpret(Context c)
                  throws ParserException

Description copied from class: AbstractRegularExpression

Parses this expression, possibly using Context to fetch the String to interpret if this Expression is a leaf expression.

Specified by:

interpret in class AbstractRegularExpression

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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