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1   package org.apache.maven.shared.transfer.collection;
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  import org.apache.maven.model.Dependency;
23  import org.apache.maven.model.Model;
24  import org.apache.maven.project.ProjectBuildingRequest;
25  import org.apache.maven.shared.transfer.dependencies.DependableCoordinate;
26  
27  /**
28   * Will only download the pom files when not available, never the artifact. 
29   * 
30   * @author Robert Scholte
31   *
32   */
33  public interface DependencyCollector
34  {
35  
36      /**
37       * Collects the transitive dependencies of some artifacts and builds a dependency graph. Note that this operation is
38       * only concerned about determining the coordinates of the transitive dependencies and does not actually resolve the
39       * artifact files. The supplied session carries various hooks to customize the dependency graph that must be invoked
40       * throughout the operation.
41       *
42       * @param buildingRequest The Maven project buildingrequest, must not be {@code null}.
43       * @param root The Maven Dependency, must not be {@code null}.
44       * @return The collection result, never {@code null}.
45       * @throws DependencyCollectionException If the dependency tree could not be built.
46       */
47      CollectResult collectDependencies( ProjectBuildingRequest buildingRequest, Dependency root )
48          throws DependencyCollectionException;
49  
50      /**
51       * Collects the transitive dependencies of some artifacts and builds a dependency graph. Note that this operation is
52       * only concerned about determining the coordinates of the transitive dependencies and does not actually resolve the
53       * artifact files. The supplied session carries various hooks to customize the dependency graph that must be invoked
54       * throughout the operation.
55       *
56       * @param buildingRequest The Maven project buildingrequest, must not be {@code null}.
57       * @param root The Maven DependableCoordinate, must not be {@code null}.
58       * @return The collection result, never {@code null}.
59       * @throws DependencyCollectionException If the dependency tree could not be built.
60       */
61      CollectResult collectDependencies( ProjectBuildingRequest buildingRequest, DependableCoordinate root )
62          throws DependencyCollectionException;
63  
64      /**
65       * Collects the transitive dependencies of some artifacts and builds a dependency graph. Note that this operation is
66       * only concerned about determining the coordinates of the transitive dependencies and does not actually resolve the
67       * artifact files. The supplied session carries various hooks to customize the dependency graph that must be invoked
68       * throughout the operation.
69       *
70       * @param buildingRequest The Maven project buildingrequest, must not be {@code null}.
71       * @param root The Maven model, must not be {@code null}.
72       * @return The collection result, never {@code null}.
73       * @throws DependencyCollectionException If the dependency tree could not be built.
74       */
75      CollectResult collectDependencies( ProjectBuildingRequest buildingRequest, Model root )
76          throws DependencyCollectionException;
77  
78  }