1 /* 2 * Copyright (C) 2009 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 android.gesture; 18 19 import android.util.Log; 20 import static android.gesture.GestureConstants.*; 21 import android.content.Context; 22 23 import java.io.File; 24 import java.io.FileOutputStream; 25 import java.io.FileNotFoundException; 26 import java.io.IOException; 27 import java.io.FileInputStream; 28 import java.io.InputStream; 29 import java.lang.ref.WeakReference; 30 31 public final class GestureLibraries { GestureLibraries()32 private GestureLibraries() { 33 } 34 fromFile(String path)35 public static GestureLibrary fromFile(String path) { 36 return fromFile(new File(path)); 37 } 38 fromFile(File path)39 public static GestureLibrary fromFile(File path) { 40 return new FileGestureLibrary(path); 41 } 42 fromPrivateFile(Context context, String name)43 public static GestureLibrary fromPrivateFile(Context context, String name) { 44 return fromFile(context.getFileStreamPath(name)); 45 } 46 fromRawResource(Context context, int resourceId)47 public static GestureLibrary fromRawResource(Context context, int resourceId) { 48 return new ResourceGestureLibrary(context, resourceId); 49 } 50 51 private static class FileGestureLibrary extends GestureLibrary { 52 private final File mPath; 53 FileGestureLibrary(File path)54 public FileGestureLibrary(File path) { 55 mPath = path; 56 } 57 58 @Override isReadOnly()59 public boolean isReadOnly() { 60 return !mPath.canWrite(); 61 } 62 save()63 public boolean save() { 64 if (!mStore.hasChanged()) return true; 65 66 final File file = mPath; 67 68 final File parentFile = file.getParentFile(); 69 if (!parentFile.exists()) { 70 if (!parentFile.mkdirs()) { 71 return false; 72 } 73 } 74 75 boolean result = false; 76 try { 77 //noinspection ResultOfMethodCallIgnored 78 file.createNewFile(); 79 mStore.save(new FileOutputStream(file), true); 80 result = true; 81 } catch (FileNotFoundException e) { 82 Log.d(LOG_TAG, "Could not save the gesture library in " + mPath, e); 83 } catch (IOException e) { 84 Log.d(LOG_TAG, "Could not save the gesture library in " + mPath, e); 85 } 86 87 return result; 88 } 89 load()90 public boolean load() { 91 boolean result = false; 92 final File file = mPath; 93 if (file.exists() && file.canRead()) { 94 try { 95 mStore.load(new FileInputStream(file), true); 96 result = true; 97 } catch (FileNotFoundException e) { 98 Log.d(LOG_TAG, "Could not load the gesture library from " + mPath, e); 99 } catch (IOException e) { 100 Log.d(LOG_TAG, "Could not load the gesture library from " + mPath, e); 101 } 102 } 103 104 return result; 105 } 106 } 107 108 private static class ResourceGestureLibrary extends GestureLibrary { 109 private final WeakReference<Context> mContext; 110 private final int mResourceId; 111 ResourceGestureLibrary(Context context, int resourceId)112 public ResourceGestureLibrary(Context context, int resourceId) { 113 mContext = new WeakReference<Context>(context); 114 mResourceId = resourceId; 115 } 116 117 @Override isReadOnly()118 public boolean isReadOnly() { 119 return true; 120 } 121 save()122 public boolean save() { 123 return false; 124 } 125 load()126 public boolean load() { 127 boolean result = false; 128 final Context context = mContext.get(); 129 if (context != null) { 130 final InputStream in = context.getResources().openRawResource(mResourceId); 131 try { 132 mStore.load(in, true); 133 result = true; 134 } catch (IOException e) { 135 Log.d(LOG_TAG, "Could not load the gesture library from raw resource " + 136 context.getResources().getResourceName(mResourceId), e); 137 } 138 } 139 140 return result; 141 } 142 } 143 } 144