1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.maven.shared.artifact.filter.resolve; 20 21 /** 22 * The element interface of the visitor pattern for transforming filters. 23 * 24 * @author Robert Scholte 25 * @since 3.0 26 */ 27 public interface TransformableFilter { 28 /** 29 * Subclasses should include the following code: 30 * <pre> 31 * @Override 32 * public abstract <T> T transform( FilterTransformer<T> transformer ) 33 * { 34 * return transformer.transform( this ); 35 * } 36 * </pre> 37 * 38 * @param <T> the interface of the tool specific filter 39 * @param transformer the tool specific transformer, may not be {@code null} 40 * @return the transformed value, never {@code null} 41 */ 42 <T> T transform(FilterTransformer<T> transformer); 43 }