144 lines
4.4 KiB
Java
144 lines
4.4 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.gesture;
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import android.util.Log;
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import static android.gesture.GestureConstants.*;
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import android.content.Context;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.lang.ref.WeakReference;
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public final class GestureLibraries {
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private GestureLibraries() {
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}
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public static GestureLibrary fromFile(String path) {
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return fromFile(new File(path));
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}
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public static GestureLibrary fromFile(File path) {
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return new FileGestureLibrary(path);
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}
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public static GestureLibrary fromPrivateFile(Context context, String name) {
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return fromFile(context.getFileStreamPath(name));
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}
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public static GestureLibrary fromRawResource(Context context, int resourceId) {
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return new ResourceGestureLibrary(context, resourceId);
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}
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private static class FileGestureLibrary extends GestureLibrary {
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private final File mPath;
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public FileGestureLibrary(File path) {
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mPath = path;
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}
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@Override
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public boolean isReadOnly() {
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return !mPath.canWrite();
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}
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public boolean save() {
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if (!mStore.hasChanged()) return true;
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final File file = mPath;
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final File parentFile = file.getParentFile();
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if (!parentFile.exists()) {
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if (!parentFile.mkdirs()) {
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return false;
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}
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}
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boolean result = false;
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try {
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//noinspection ResultOfMethodCallIgnored
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file.createNewFile();
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mStore.save(new FileOutputStream(file), true);
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result = true;
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} catch (FileNotFoundException e) {
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Log.d(LOG_TAG, "Could not save the gesture library in " + mPath, e);
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} catch (IOException e) {
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Log.d(LOG_TAG, "Could not save the gesture library in " + mPath, e);
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}
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return result;
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}
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public boolean load() {
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boolean result = false;
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final File file = mPath;
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if (file.exists() && file.canRead()) {
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try {
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mStore.load(new FileInputStream(file), true);
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result = true;
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} catch (FileNotFoundException e) {
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Log.d(LOG_TAG, "Could not load the gesture library from " + mPath, e);
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} catch (IOException e) {
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Log.d(LOG_TAG, "Could not load the gesture library from " + mPath, e);
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}
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}
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return result;
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}
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}
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private static class ResourceGestureLibrary extends GestureLibrary {
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private final WeakReference<Context> mContext;
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private final int mResourceId;
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public ResourceGestureLibrary(Context context, int resourceId) {
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mContext = new WeakReference<Context>(context);
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mResourceId = resourceId;
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}
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@Override
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public boolean isReadOnly() {
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return true;
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}
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public boolean save() {
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return false;
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}
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public boolean load() {
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boolean result = false;
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final Context context = mContext.get();
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if (context != null) {
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final InputStream in = context.getResources().openRawResource(mResourceId);
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try {
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mStore.load(in, true);
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result = true;
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} catch (IOException e) {
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Log.d(LOG_TAG, "Could not load the gesture library from raw resource " +
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context.getResources().getResourceName(mResourceId), e);
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}
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}
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return result;
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}
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}
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}
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