org.businessmanager.util.DefaultItemPredicate.java Source code

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Here is the source code for org.businessmanager.util.DefaultItemPredicate.java

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/*******************************************************************************
 * Copyright 2012 Christian Ternes and Thorsten Volland
 * 
 * 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.
 ******************************************************************************/
package org.businessmanager.util;

import org.apache.commons.collections.Predicate;
import org.businessmanager.domain.HasDefault;

public class DefaultItemPredicate implements Predicate {

    private Class<?> clazz;
    private Predicate predicate = null;

    public DefaultItemPredicate(Class<? extends HasDefault> typeClass) {
        this(typeClass, null);
    }

    public DefaultItemPredicate(Class<? extends HasDefault> typeClass, Predicate predicate) {
        this.clazz = typeClass;
        this.predicate = predicate;
    }

    @Override
    public boolean evaluate(Object obj) {

        if (obj != null && obj instanceof HasDefault && clazz.equals(obj.getClass())) {
            Boolean isDefault = ((HasDefault) obj).getIsDefault();
            if (isDefault == null)
                isDefault = false;

            if (predicate != null) {
                return isDefault && predicate.evaluate(obj);
            } else {
                return isDefault;
            }
        }
        return false;
    }

}