1 package org.apache.maven.shared.artifact.filter.resolve; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 /** 23 * The element interface of the visitor pattern for transforming filters. 24 * 25 * @author Robert Scholte 26 * @since 3.0 27 */ 28 public interface TransformableFilter 29 { 30 /** 31 * Subclasses should include the following code: 32 * <pre> 33 * @Override 34 * public abstract <T> T transform( FilterTransformer<T> transformer ) 35 * { 36 * return transformer.transform( this ); 37 * } 38 * </pre> 39 * 40 * @param <T> the interface of the tool specific filter 41 * @param transformer the tool specific transformer, may not be {@code null} 42 * @return the transformed value, never {@code null} 43 */ 44 <T> T transform( FilterTransformer<T> transformer ); 45 }