001 /* 002 * Created on Nov 1, 2007 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 * 014 * Copyright @2007 the original author or authors. 015 */ 016 package org.fest.util; 017 018 import java.util.Collection; 019 import java.util.List; 020 021 /** 022 * Understands a filter for elements in a collection. 023 * @param <T> the generic type of the elements to return by the filter. 024 * 025 * @author Yvonne Wang 026 */ 027 public interface CollectionFilter<T> { 028 029 /** 030 * Filters a given collection. 031 * @param target the collection to filter. 032 * @return a list containing the filtered elements. 033 */ 034 List<T> filter(Collection<?> target); 035 }