/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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.apache.el.parser;

import java.math.BigDecimal;

import java.math.BigInteger;

import javax.el.ELException;

import org.apache.el.lang.EvaluationContext;

/**

 * @author Jacob Hookom [jacob@hookom.net]

 */

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));

        }

        if (obj instanceof Long) {

            return new Long(-((Long) obj).longValue());

        }

        if (obj instanceof Double) {

            return new Double(-((Double) obj).doubleValue());

        }

        if (obj instanceof Integer) {

            return new Integer(-((Integer) obj).intValue());

        }

        if (obj instanceof Float) {

            return new Float(-((Float) obj).floatValue());

        }

        if (obj instanceof Short) {

            return new Short((short) -((Short) obj).shortValue());

        }

        if (obj instanceof Byte) {

            return new Byte((byte) -((Byte) obj).byteValue());

        }

        Long num = (Long) coerceToNumber(obj, Long.class);

        return new Long(-num.longValue());

    }

}