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 }