1 /*
2  * Copyright (C) 2015 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.compatibility.common.util;
18 
19 import org.xmlpull.v1.XmlPullParser;
20 import org.xmlpull.v1.XmlPullParserException;
21 import org.xmlpull.v1.XmlPullParserFactory;
22 
23 import java.io.File;
24 import java.io.FileInputStream;
25 import java.io.FileNotFoundException;
26 import java.io.IOException;
27 import java.io.InputStreamReader;
28 import java.util.ArrayList;
29 import java.util.HashMap;
30 import java.util.List;
31 import java.util.Map;
32 import java.util.Set;
33 
34 /**
35  * Load dynamic config for test cases
36  */
37 public class DynamicConfig {
38 
39     //XML constant
40     public static final String NS = null;
41     public static final String CONFIG_TAG = "dynamicConfig";
42     public static final String ENTRY_TAG = "entry";
43     public static final String VALUE_TAG = "value";
44     public static final String KEY_ATTR = "key";
45     public final static String CONFIG_FOLDER_ON_DEVICE = "/sdcard/dynamic-config-files/";
46 
47     protected Map<String, List<String>> mDynamicConfigMap = new HashMap<String, List<String>>();
48 
initializeConfig(File file)49     protected void initializeConfig(File file) throws XmlPullParserException, IOException {
50         mDynamicConfigMap = createConfigMap(file);
51     }
52 
getValue(String key)53     public String getValue(String key) {
54         List<String> singleValue = mDynamicConfigMap.get(key);
55         if (singleValue == null || singleValue.size() == 0 || singleValue.size() > 1) {
56             // key must exist in the map, and map to a list containing exactly one string
57             return null;
58         }
59         return singleValue.get(0);
60     }
61 
getValues(String key)62     public List<String> getValues(String key) {
63         return mDynamicConfigMap.get(key);
64     }
65 
keySet()66     public Set<String> keySet() {
67         return mDynamicConfigMap.keySet();
68     }
69 
getConfigFile(File configFolder, String moduleName)70     public static File getConfigFile(File configFolder, String moduleName)
71             throws FileNotFoundException {
72         File config =  new File(configFolder, String.format("%s.dynamic", moduleName));
73         if (!config.exists()) {
74             throw new FileNotFoundException(String.format("Cannot find %s.dynamic", moduleName));
75         }
76         return config;
77     }
78 
createConfigMap(File file)79     public static Map<String, List<String>> createConfigMap(File file)
80             throws XmlPullParserException, IOException {
81 
82         Map<String, List<String>> dynamicConfigMap = new HashMap<String, List<String>>();
83         XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();
84         parser.setInput(new InputStreamReader(new FileInputStream(file)));
85         parser.nextTag();
86         parser.require(XmlPullParser.START_TAG, NS, CONFIG_TAG);
87 
88         while (parser.nextTag() == XmlPullParser.START_TAG) {
89             parser.require(XmlPullParser.START_TAG, NS, ENTRY_TAG);
90             String key = parser.getAttributeValue(NS, KEY_ATTR);
91             List<String> valueList = new ArrayList<String>();
92             while (parser.nextTag() == XmlPullParser.START_TAG) {
93                 parser.require(XmlPullParser.START_TAG, NS, VALUE_TAG);
94                 valueList.add(parser.nextText());
95                 parser.require(XmlPullParser.END_TAG, NS, VALUE_TAG);
96             }
97             parser.require(XmlPullParser.END_TAG, NS, ENTRY_TAG);
98             if (key != null && !key.isEmpty()) {
99                 dynamicConfigMap.put(key, valueList);
100             }
101         }
102 
103         parser.require(XmlPullParser.END_TAG, NS, CONFIG_TAG);
104         return dynamicConfigMap;
105     }
106 }
107