org.broadleafcommerce.common.util.TypedPredicate Maven / Gradle / Ivy
/*
* #%L
* BroadleafCommerce Common Libraries
* %%
* Copyright (C) 2009 - 2013 Broadleaf Commerce
* %%
* 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
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*/
package org.broadleafcommerce.common.util;
import org.apache.commons.collections.Predicate;
import java.lang.reflect.ParameterizedType;
/**
* A class that provides for a typed predicat
*
* @author Andre Azzolini (apazzolini)
*
* @param the type of object the predicate uses
*/
@SuppressWarnings("unchecked")
public abstract class TypedPredicate implements Predicate {
protected Class clazz;
public TypedPredicate() {
clazz = (Class) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
}
public boolean evaluate(Object value) {
if (value == null || clazz.isAssignableFrom(value.getClass())) {
return eval((T) value);
}
return false;
}
public abstract boolean eval(T value);
}