package org.apache.ddlutils.util;

/*
 * 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.
 * Modified by
 * @author  Data Virtuality GmbH
 * @date    $Date$
 *  
 */

import org.apache.commons.collections.Predicate;

/**
 * A predicate that tests whether the object is of one of the configured types. 
 * 
 * @version $Revision: $
 */
public class MultiInstanceofPredicate implements Predicate
{
    /** The types to check. */
    private Class[] _typesToCheck;

    /**
     * Creates a new predicate.
     * 
     * @param typesToCheck The types to check
     */
    public MultiInstanceofPredicate(Class[] typesToCheck)
    {
        _typesToCheck = typesToCheck;
    }

    /**
     * {@inheritDoc}
     */
    public boolean evaluate(Object obj)
    {
        if ((_typesToCheck == null) || (_typesToCheck.length == 0))
        {
            return true;
        }
        else
        {
            Class typeOfObj = obj.getClass();
    
            for (int idx = 0; idx < _typesToCheck.length; idx++)
            {
                if (_typesToCheck[idx].isAssignableFrom(typeOfObj))
                {
                    return true;
                }
            }
            return false;
        }
    }

}
