org.apache.commons.collections4.functors.AndPredicate Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.commons.collections4.functors;
import java.io.Serializable;
import org.apache.commons.collections4.Predicate;
/**
* Predicate implementation that returns true if both the predicates return true.
*
* @since 3.0
*/
public final class AndPredicate implements PredicateDecorator, Serializable {
/** Serial version UID */
private static final long serialVersionUID = 4189014213763186912L;
/** The array of predicates to call */
private final Predicate iPredicate1;
/** The array of predicates to call */
private final Predicate iPredicate2;
/**
* Factory to create the predicate.
*
* @param the type that the predicate queries
* @param predicate1 the first predicate to check, not null
* @param predicate2 the second predicate to check, not null
* @return the and predicate
* @throws NullPointerException if either predicate is null
*/
public static Predicate andPredicate(final Predicate predicate1,
final Predicate predicate2) {
if (predicate1 == null || predicate2 == null) {
throw new NullPointerException("Predicate must not be null");
}
return new AndPredicate<>(predicate1, predicate2);
}
/**
* Constructor that performs no validation.
* Use andPredicate if you want that.
*
* @param predicate1 the first predicate to check, not null
* @param predicate2 the second predicate to check, not null
*/
public AndPredicate(final Predicate predicate1, final Predicate predicate2) {
super();
iPredicate1 = predicate1;
iPredicate2 = predicate2;
}
/**
* Evaluates the predicate returning true if both predicates return true.
*
* @param object the input object
* @return true if both decorated predicates return true
*/
@Override
public boolean evaluate(final T object) {
return iPredicate1.evaluate(object) && iPredicate2.evaluate(object);
}
/**
* Gets the two predicates being decorated as an array.
*
* @return the predicates
* @since 3.1
*/
@Override
@SuppressWarnings("unchecked")
public Predicate[] getPredicates() {
return new Predicate[] {iPredicate1, iPredicate2};
}
}