AstNegative.java

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* Generated By:JJTree: Do not edit this line. AstNegative.java */

package org.jboss.el.parser;

import java.math.BigDecimal;
import java.math.BigInteger;

import javax.el.ELException;

import org.jboss.el.lang.EvaluationContext;



/**
 * @author Jacob Hookom [jacob@hookom.net]
 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: markt $
 */
@SuppressWarnings("rawtypes")
public final class AstNegative extends SimpleNode {
	public AstNegative(int id) {
		super(id);
	}

	public Class getType(EvaluationContext ctx)
			throws ELException {
		return Number.class;
	}

	public Object getValue(EvaluationContext ctx)
			throws ELException {
		Object obj = this.children[0].getValue(ctx);

		if (obj == null) {
			return new Long(0);
		}
		if (obj instanceof BigDecimal) {
			return ((BigDecimal) obj).negate();
		}
		if (obj instanceof BigInteger) {
			return ((BigInteger) obj).negate();
		}
		if (obj instanceof String) {
			if (isStringFloat((String) obj)) {
				return new Double(-Double.parseDouble((String) obj));
			}
			return new Long(-Long.parseLong((String) obj));
		}
		Class type = obj.getClass();
		if (obj instanceof Long || Long.TYPE == type) {
			return new Long(-((Long) obj).longValue());
		}
		if (obj instanceof Double || Double.TYPE == type) {
			return new Double(-((Double) obj).doubleValue());
		}
		if (obj instanceof Integer || Integer.TYPE == type) {
			return new Integer(-((Integer) obj).intValue());
		}
		if (obj instanceof Float || Float.TYPE == type) {
			return new Float(-((Float) obj).floatValue());
		}
		if (obj instanceof Short || Short.TYPE == type) {
			return new Short((short) -((Short) obj).shortValue());
		}
		if (obj instanceof Byte || Byte.TYPE == type) {
			return new Byte((byte) -((Byte) obj).byteValue());
		}
		Long num = (Long) coerceToNumber(obj, Long.class);
		return new Long(-num.longValue());
	}
}