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.model.building;
20
21 import java.util.function.Supplier;
22
23 import org.apache.maven.building.Source;
24
25 /**
26 * Caches auxiliary data used during model building like already processed raw/effective models. The data in the cache
27 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
28 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the
29 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
30 * model builder.
31 *
32 */
33 public interface ModelCache {
34
35 <T> T computeIfAbsent(String groupId, String artifactId, String version, String tag, Supplier<T> data);
36
37 <T> T computeIfAbsent(Source path, String tag, Supplier<T> data);
38 }