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jpicedt.graphic.io.parser
Class AbstractRegularExpression  

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

All Implemented Interfaces:

ExpressionConstants

Direct Known Subclasses:

AlternateExpression, EnclosingExpression, GNURegExpression, LiteralExpression, NumericalExpression, OptionalExpression, PicPointExpression, RepeatExpression, SequenceExpression, StatementExpression, TerminalExpression, WildCharExpression, WordExpression

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public abstract class AbstractRegularExpression

extends java.lang.Object

implements ExpressionConstants

This is the abstract superclass for all regular expression that build up the LaTeX parser. It mimics the RegExp scheme, while at the same time allowing expression to send ParserEvent when a piece of text was successfully parsed (instead of delegating to a separate ParserHandler, events are handled directly in the core of the action method). A Context is then used to feed successive pieces of text to the reg-exp's that build up the grammar tree, and a Pool (currently implemented as an inner class of the LaTeXParser) allow reg-exp to share data.

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Field Summary

 

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

AbstractRegularExpression()

 

Method Summary
void	action(ParserEvent e)           Called during interpret operation at the end of a SUCCESSFUL interpret operation.
abstract  boolean	interpret(Context c)           Parses this expression, possibly using Context to fetch the String to interpret if this Expression is a leaf expression.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

AbstractRegularExpression

public AbstractRegularExpression()

Method Detail

interpret

public abstract boolean interpret(Context c)
                           throws ParserException

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

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action

public void action(ParserEvent e)
            throws ParserException

Called during interpret operation at the end of a SUCCESSFUL interpret operation. Should be overriden by daughter classes to process proper action, e.g. set object properties... Current implementation does nothing.

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