Package jpicedt.format.input.util

Class StatementExpression

java.lang.Object

jpicedt.format.input.util.AbstractRegularExpression

jpicedt.format.input.util.StatementExpression

All Implemented Interfaces:

ExpressionConstants

Direct Known Subclasses:

PicDashStatement, PSTAngleParameter

public class StatementExpression
extends AbstractRegularExpression

An expression for "statement"-parsing, i.e. a name followed by an assignment sign followed by a numerical value e.g. "dash=4.0" or "thickness->8"

Since:

jpicedt 1.3

Version:

$Id: StatementExpression.java,v 1.4.2.1 2007/09/02 11:56:14 reynal Exp $

Author:

Sylvain Reynal

Field Summary

Fields inherited from interface jpicedt.format.input.util.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

Constructors

Constructor	Description
StatementExpression(java.lang.String leftHandSide, java.lang.String equalSymbol, java.lang.String postfix, int type, int sign)

Method Summary

Modifier and Type	Method	Description
java.lang.Number	getValue()	Return the value of the RHS, wrapped in a Number (either Integer or Double)
boolean	interpret(Context c)	Parses this expression, possibly using the given Context to fetch the String to interpret if this Expression is a leaf expression.
java.lang.String	toString()

Methods inherited from class jpicedt.format.input.util.AbstractRegularExpression

action

Methods inherited from class java.lang.Object

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

Constructor Detail

StatementExpression

public StatementExpression(java.lang.String leftHandSide,
                           java.lang.String equalSymbol,
                           java.lang.String postfix,
                           int type,
                           int sign)

Parameters:

leftHandSide - aka name of a variable

equalSymbol - e.g. "=" or "->" etc...

postfix - marks the end of the numerical expression (can be null, see NumericalExpression comments)

type - type of numerical value (DOUBLE or INTEGER)

sign - constraints laid on the sign of numerical values (ANY_SIGN, POSITIVE, ...) A typical use would be : StatementExpression("dash", "=", null, "pt_1", DOUBLE, POSITIVE)

Method Detail

interpret

public boolean interpret(Context c)
                  throws REParserException

Description copied from class: AbstractRegularExpression

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

Specified by:

interpret in class AbstractRegularExpression

Returns:

TRUE if and only if every expression contained in this expression has been found, in the proper order.

Throws:

REParserException.IncompleteSequence - if any expression but the first one wasn't found Whether TRUE or FALSE, calls action with key="&" and value=value of number found (of type Number)

REParserException - if an error occur during parsing

getValue

public java.lang.Number getValue()

Return the value of the RHS, wrapped in a Number (either Integer or Double)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a String representation of this expression