jpicedt.format.input.util

Class NumericalExpression

java.lang.Object

jpicedt.format.input.util.AbstractRegularExpression

jpicedt.format.input.util.NumericalExpression

All Implemented Interfaces:

ExpressionConstants

public class NumericalExpression
extends AbstractRegularExpression

An expression containing only digits, possibly preceded by whitespaces ; a post-delimiters can be specified, as well as the number's type (int or double) and its sign

Since:

jpicedt 1.3

Version:

$Id: NumericalExpression.java,v 1.4.2.1 2007/09/02 11:56:13 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 and Description
NumericalExpression() Constructor w/o postfix, type=DOUBLE and sign=ANY_SIGN.
NumericalExpression(int numberType, int sign) Constructor w/o postfix, i.e.
NumericalExpression(int numberType, int sign, java.lang.String postfix, boolean swallowPostFix)

Method Summary

Modifier and Type	Method and Description
java.lang.Number	getValue() Return the parsed value, wrapped in a Number (either Integer or Double)
boolean	interpret(Context context) 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

NumericalExpression

public NumericalExpression(int numberType,
                           int sign,
                           java.lang.String postfix,
                           boolean swallowPostFix)

Parameters:

numberType - INTEGER or DOUBLE

sign - ANY_SIGN, POSITIVE, NEGATIVE, STRICTLY_POSITIVE, STRICTLY_NEGATIVE or NON_NULL

postfix - a String that signals the end of this numerical expression (if NULL, swallows as many digits as possible)

swallowPostFix - if TRUE, move cursor JUST BEHIND the postfix; else move it TO THE POSTFIX POSITION N/A if postFix is null.

NumericalExpression

public NumericalExpression(int numberType,
                           int sign)

Constructor w/o postfix, i.e. parse as many digits as possible.

Parameters:

numberType - INTEGER or DOUBLE

sign - ANY_SIGN, POSITIVE, NEGATIVE, STRICTLY_POSITIVE, STRICTLY_NEGATIVE or NON_NULL

NumericalExpression

public NumericalExpression()

Constructor w/o postfix, type=DOUBLE and sign=ANY_SIGN.

Method Detail

interpret

public boolean interpret(Context context)
                  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 expr has been found on the current line Calls action() in case of successful parsing, and send a ParserEvent with value=parsed number.

Throws:

REParserException - if an error occur during parsing

getValue

public java.lang.Number getValue()

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object