1 /*
2  * Copyright (C) 2012 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 com.android.idegen;
18 
19 import com.google.common.base.Preconditions;
20 import com.google.common.collect.Maps;
21 import com.google.common.collect.Sets;
22 import com.google.common.io.Files;
23 import com.google.common.io.LineProcessor;
24 
25 import java.io.File;
26 import java.io.IOException;
27 import java.nio.charset.Charset;
28 import java.util.HashMap;
29 import java.util.Set;
30 import java.util.logging.Level;
31 import java.util.logging.Logger;
32 
33 /**
34  * Mapping of module names to make files.
35  */
36 public class ModuleIndexes {
37 
38     private static final Logger logger = Logger.getLogger(ModuleIndexes.class.getName());
39 
40     private File indexFile;
41     private HashMap<String, String> moduleNameToMakeFileMap;
42     private HashMap<String, Set<String>> makeFileToModuleNamesMap;
43 
ModuleIndexes(File indexFile)44     public ModuleIndexes(File indexFile) {
45         this.indexFile = indexFile;
46     }
47 
build()48     public void build() throws IOException {
49 
50         moduleNameToMakeFileMap = Maps.newHashMap();
51         makeFileToModuleNamesMap = Maps.newHashMap();
52         logger.info("Building index from " + indexFile.getCanonicalPath());
53         Files.readLines(indexFile, Charset.forName("UTF-8"),
54                 new LineProcessor<Object>() {
55                     int count = 0;
56 
57                     @Override
58                     public boolean processLine(String line) throws IOException {
59                         count++;
60                         String[] arr = line.split(":");
61                         if (arr.length < 2) {
62                             logger.log(Level.WARNING,
63                                     "Ignoring index line " + count + ". Bad format: " + line);
64                         } else {
65                             String makeFile = arr[0];
66                             String moduleName = arr[1];
67                             moduleNameToMakeFileMap.put(moduleName, makeFile);
68                             append(makeFile, moduleName);
69                         }
70                         return true;
71                     }
72 
73                     @Override
74                     public Object getResult() {
75                         return null;
76                     }
77                 });
78     }
79 
append(String makeFile, String moduleName)80     private void append(String makeFile, String moduleName) {
81         Set<String> moduleNames = makeFileToModuleNamesMap.get(makeFile);
82         if (moduleNames == null) {
83             moduleNames = Sets.newHashSet();
84             makeFileToModuleNamesMap.put(makeFile, moduleNames);
85         } else {
86             // Create a aggregate module place holder.
87             //moduleNameToMakeFileMap.put(getAggregateName(moduleDir), makeFile);
88         }
89         moduleNames.add(moduleName);
90     }
91 
getMakeFile(String moduleName)92     public String getMakeFile(String moduleName) {
93         Preconditions.checkState(moduleNameToMakeFileMap != null,
94                 "Index not built. Call build() first.");
95 
96         return moduleNameToMakeFileMap.get(moduleName);
97     }
98 }
99