/*
 * Copyright 2005-2010 the original author or authors.
 * 
 * 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.wamblee.collections;

import org.wamblee.conditions.Condition;

import java.util.Collection;

/**
 * Collection filter for filtering collections based on a certain condition.  
 * 
 * @author Erik Brakkee
 */
public class CollectionFilter {
    /**
     * Filters a collection by adding all elements in the from collection that
     * satisfy a given condition to the to collection.
     * 
     * @param <T>
     *            Type of contained element.
     * @param aFrom
     *            From container to which the condition is applied.
     * @param aTo
     *            To container to which matching elements are added.
     * @param aCondition
     *            Condition by which elements are matched.
     */
    public static <T> void filter(Collection<T> aFrom, Collection<T> aTo,
        Condition<T> aCondition) {
        for (T t : aFrom) {
            if (aCondition.matches(t)) {
                aTo.add(t);
            }
        }
    }
}