1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package dexfuzz.rawdex;
18 
19 import java.io.IOException;
20 
21 /**
22  * Base class for any data structure that we may read or write from a DEX file.
23  */
24 public interface RawDexObject {
25   /**
26    * Populate information for this DEX data from the file.
27    * @param file Input file, should already be "seeked" to the correct position.
28    * @throws IOException If there's a problem writing to the file.
29    */
read(DexRandomAccessFile file)30   public void read(DexRandomAccessFile file) throws IOException;
31 
32   /**
33    * Write information for this DEX data to the file.
34    * @param file Output file, should already be "seeked" to the correct position.
35    * @throws IOException If there's a problem writing to the file.
36    */
write(DexRandomAccessFile file)37   public void write(DexRandomAccessFile file) throws IOException;
38 
39   public static enum IndexUpdateKind {
40     STRING_ID,
41     TYPE_ID,
42     PROTO_ID,
43     FIELD_ID,
44     METHOD_ID
45   }
46 
47   /**
48    * When we insert a new string, type, proto, field or method into the DEX file,
49    * this must be called. We may have inserted something into the middle of a table,
50    * so any indices pointing afterwards must be updated.
51    */
incrementIndex(IndexUpdateKind kind, int insertedIdx)52   public void incrementIndex(IndexUpdateKind kind, int insertedIdx);
53 }
54