1 // Copyright 2016 Google Inc. All rights reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //     http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 package com.google.archivepatcher.shared;
16 
17 import java.io.IOException;
18 import java.io.InputStream;
19 
20 /**
21  * A factory that produces multiple independent but identical byte streams exposed via the {@link
22  * InputStream} class.
23  */
24 public interface MultiViewInputStreamFactory {
25   /**
26    * Create and return a new {@link InputStream}. The returned stream is guaranteed to independently
27    * produce the same byte sequence as any other stream obtained via a call to this method on the
28    * same instance of this object.
29    *
30    * @return the stream
31    * @throws IOException if something goes wrong
32    */
newStream()33   public InputStream newStream() throws IOException;
34 }
35