Ben Gilad | 03a533a | 2013-08-21 09:46:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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.contacts.common.extensions; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.util.Log; |
| 21 | |
| 22 | import java.io.FileNotFoundException; |
| 23 | import java.io.IOException; |
| 24 | import java.io.InputStream; |
| 25 | import java.util.Properties; |
| 26 | |
| 27 | |
| 28 | /* |
| 29 | * A framework for adding extensions to Dialer. This class reads a property file from |
| 30 | * assets/contacts_extensions.properties and loads extension classes that an app has defined. If |
| 31 | * an extension class was not defined, null is returned. |
| 32 | */ |
| 33 | public class ExtensionsFactory { |
| 34 | |
| 35 | private static String TAG = "ExtensionsFactory"; |
| 36 | |
| 37 | // Config filename for mappings of various class names to their custom |
| 38 | // implementations. |
| 39 | private static final String EXTENSIONS_PROPERTIES = "contacts_extensions.properties"; |
| 40 | |
| 41 | private static final String EXTENDED_PHONE_DIRECTORIES_KEY = "extendedPhoneDirectories"; |
| 42 | |
| 43 | private static Properties sProperties = null; |
| 44 | private static ExtendedPhoneDirectoriesManager mExtendedPhoneDirectoriesManager = null; |
| 45 | |
| 46 | public static void init(Context context) { |
| 47 | if (sProperties != null) { |
| 48 | return; |
| 49 | } |
| 50 | try { |
| 51 | final InputStream fileStream = context.getAssets().open(EXTENSIONS_PROPERTIES); |
| 52 | sProperties = new Properties(); |
| 53 | sProperties.load(fileStream); |
| 54 | fileStream.close(); |
| 55 | |
| 56 | final String className = sProperties.getProperty(EXTENDED_PHONE_DIRECTORIES_KEY); |
| 57 | if (className != null) { |
| 58 | mExtendedPhoneDirectoriesManager = createInstance(className); |
| 59 | } else { |
| 60 | Log.d(TAG, EXTENDED_PHONE_DIRECTORIES_KEY + " not found in properties file."); |
| 61 | } |
| 62 | |
| 63 | } catch (FileNotFoundException e) { |
| 64 | // No custom extensions. Ignore. |
| 65 | Log.d(TAG, "No custom extensions."); |
| 66 | } catch (IOException e) { |
| 67 | Log.d(TAG, e.toString()); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | private static <T> T createInstance(String className) { |
| 72 | try { |
| 73 | Class<?> c = Class.forName(className); |
| 74 | //noinspection unchecked |
| 75 | return (T) c.newInstance(); |
| 76 | } catch (ClassNotFoundException e) { |
| 77 | Log.e(TAG, className + ": unable to create instance.", e); |
| 78 | } catch (IllegalAccessException e) { |
| 79 | Log.e(TAG, className + ": unable to create instance.", e); |
| 80 | } catch (InstantiationException e) { |
| 81 | Log.e(TAG, className + ": unable to create instance.", e); |
| 82 | } |
| 83 | return null; |
| 84 | } |
| 85 | |
| 86 | public static ExtendedPhoneDirectoriesManager getExtendedPhoneDirectoriesManager() { |
| 87 | return mExtendedPhoneDirectoriesManager; |
| 88 | } |
| 89 | } |