org.icefaces.ace.util.collections.AnyPredicate Maven / Gradle / Ivy
Show all versions of icefaces-ace Show documentation
/*
* Copyright 2004-2013 ICEsoft Technologies Canada Corp.
*
* 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.icefaces.ace.util.collections;
import java.io.Serializable;
import java.util.Collection;
/**
* Predicate implementation that returns true if any of the
* predicates return true.
* If the array of predicates is empty, then this predicate returns false.
*
* NOTE: In versions prior to 3.2 an array size of zero or one
* threw an exception.
*
* @since Commons Collections 3.0
* @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
*
* @author Stephen Colebourne
* @author Matt Benson
*/
public final class AnyPredicate implements Predicate, PredicateDecorator, Serializable {
/** Serial version UID */
private static final long serialVersionUID = 7429999530934647542L;
/** The array of predicates to call */
private final Predicate[] iPredicates;
/**
* Factory to create the predicate.
*
* If the array is size zero, the predicate always returns false.
* If the array is size one, then that predicate is returned.
*
* @param predicates the predicates to check, cloned, not null
* @return the any predicate
* @throws IllegalArgumentException if the predicates array is null
* @throws IllegalArgumentException if any predicate in the array is null
*/
public static Predicate getInstance(Predicate[] predicates) {
FunctorUtils.validate(predicates);
if (predicates.length == 0) {
return FalsePredicate.INSTANCE;
}
if (predicates.length == 1) {
return predicates[0];
}
return new AnyPredicate(FunctorUtils.copy(predicates));
}
/**
* Factory to create the predicate.
*
* If the collection is size zero, the predicate always returns false.
* If the collection is size one, then that predicate is returned.
*
* @param predicates the predicates to check, cloned, not null
* @return the all predicate
* @throws IllegalArgumentException if the predicates array is null
* @throws IllegalArgumentException if any predicate in the array is null
*/
public static Predicate getInstance(Collection predicates) {
Predicate[] preds = FunctorUtils.validate(predicates);
if (preds.length == 0) {
return FalsePredicate.INSTANCE;
}
if (preds.length == 1) {
return preds[0];
}
return new AnyPredicate(preds);
}
/**
* Constructor that performs no validation.
* Use getInstance if you want that.
*
* @param predicates the predicates to check, not cloned, not null
*/
public AnyPredicate(Predicate[] predicates) {
super();
iPredicates = predicates;
}
/**
* Evaluates the predicate returning true if any predicate returns true.
*
* @param object the input object
* @return true if any decorated predicate return true
*/
public boolean evaluate(Object object) {
for (int i = 0; i < iPredicates.length; i++) {
if (iPredicates[i].evaluate(object)) {
return true;
}
}
return false;
}
/**
* Gets the predicates, do not modify the array.
*
* @return the predicates
* @since Commons Collections 3.1
*/
public Predicate[] getPredicates() {
return iPredicates;
}
}