/*******************************************************************************
* Copyright (c) 2006 Oracle Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Oracle Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.bpel.xpath10;
/**
* A number expression.
*
* @author Michal Chmielewski (michal.chmielewski@oracle.com)
* @date Aug 26, 2008
*
*/
public class NumberExpr extends Expr {
Number fNumber = Integer.valueOf( 0 );
/**
* Brand new shiny number expression.
* @param number
*/
public NumberExpr (String number) {
super( number );
fNumber = extractNumber(number);
}
/**
* Brand new shiny number expression.
* @param num
*/
public NumberExpr (Number num) {
super(num.toString());
fNumber = num;
}
/**
* @return the number.
*/
public Number getNumber() {
return fNumber;
}
Number extractNumber(String numberBody) {
boolean isReal = numberBody.indexOf('.') >= 0;
if (!isReal) {
return new Integer(numberBody);
}
double result = Double.parseDouble(numberBody);
return new Double(result);
}
/**
* negate the number expression.
*/
public void negate () {
if (fNumber instanceof Float) {
fNumber = Float.valueOf( -1 * fNumber.floatValue());
} else if (fNumber instanceof Short) {
fNumber = Short.valueOf((short) (-1 * fNumber.shortValue()));
} else if (fNumber instanceof Integer) {
fNumber = Integer.valueOf( -1*fNumber.intValue());
} else if (fNumber instanceof Long) {
fNumber = Long.valueOf( -1*fNumber.longValue());
} else {
fNumber = Double.valueOf( -1.0 * fNumber.doubleValue());
}
}
}