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1   package org.apache.maven.settings.building;
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 java.io.IOException;
23  import java.io.InputStream;
24  
25  /**
26   * Provides access to the contents of settings independently of the backing store (e.g. file system, database, memory).
27   * 
28   * @author Benjamin Bentmann
29   */
30  public interface SettingsSource
31  {
32  
33      /**
34       * Gets a byte stream to the settings contents. Closing the returned stream is the responsibility of the caller.
35       * Note that each invocation of this method returns a new/fresh stream which represents the entire contents.
36       * 
37       * @return A byte stream to the settings contents, never {@code null}.
38       */
39      InputStream getInputStream()
40          throws IOException;
41  
42      /**
43       * Provides a user-friendly hint about the location of the settings. This could be a local file path, a URI or just
44       * an empty string. The intention is to assist users during error reporting.
45       * 
46       * @return A user-friendly hint about the location of the settings, never {@code null}.
47       */
48      String getLocation();
49  
50  }