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-rw-r--r--src/com/android/gallery3d/data/DataManager.java371
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diff --git a/src/com/android/gallery3d/data/DataManager.java b/src/com/android/gallery3d/data/DataManager.java
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--- a/src/com/android/gallery3d/data/DataManager.java
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-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.gallery3d.data;
-
-import android.content.Context;
-import android.database.ContentObserver;
-import android.net.Uri;
-import android.os.Handler;
-
-import com.android.gallery3d.app.GalleryApp;
-import com.android.gallery3d.app.StitchingChangeListener;
-import com.android.gallery3d.common.Utils;
-import com.android.gallery3d.data.MediaObject.PanoramaSupportCallback;
-import com.android.gallery3d.data.MediaSet.ItemConsumer;
-import com.android.gallery3d.data.MediaSource.PathId;
-import com.android.gallery3d.picasasource.PicasaSource;
-
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-import java.util.Map.Entry;
-import java.util.WeakHashMap;
-
-// DataManager manages all media sets and media items in the system.
-//
-// Each MediaSet and MediaItem has a unique 64 bits id. The most significant
-// 32 bits represents its parent, and the least significant 32 bits represents
-// the self id. For MediaSet the self id is is globally unique, but for
-// MediaItem it's unique only relative to its parent.
-//
-// To make sure the id is the same when the MediaSet is re-created, a child key
-// is provided to obtainSetId() to make sure the same self id will be used as
-// when the parent and key are the same. A sequence of child keys is called a
-// path. And it's used to identify a specific media set even if the process is
-// killed and re-created, so child keys should be stable identifiers.
-
-public class DataManager implements StitchingChangeListener {
- public static final int INCLUDE_IMAGE = 1;
- public static final int INCLUDE_VIDEO = 2;
- public static final int INCLUDE_ALL = INCLUDE_IMAGE | INCLUDE_VIDEO;
- public static final int INCLUDE_LOCAL_ONLY = 4;
- public static final int INCLUDE_LOCAL_IMAGE_ONLY =
- INCLUDE_LOCAL_ONLY | INCLUDE_IMAGE;
- public static final int INCLUDE_LOCAL_VIDEO_ONLY =
- INCLUDE_LOCAL_ONLY | INCLUDE_VIDEO;
- public static final int INCLUDE_LOCAL_ALL_ONLY =
- INCLUDE_LOCAL_ONLY | INCLUDE_IMAGE | INCLUDE_VIDEO;
-
- // Any one who would like to access data should require this lock
- // to prevent concurrency issue.
- public static final Object LOCK = new Object();
-
- public static DataManager from(Context context) {
- GalleryApp app = (GalleryApp) context.getApplicationContext();
- return app.getDataManager();
- }
-
- private static final String TAG = "DataManager";
-
- // This is the path for the media set seen by the user at top level.
- private static final String TOP_SET_PATH = "/combo/{/local/all,/picasa/all}";
-
- private static final String TOP_IMAGE_SET_PATH = "/combo/{/local/image,/picasa/image}";
-
- private static final String TOP_VIDEO_SET_PATH =
- "/combo/{/local/video,/picasa/video}";
-
- private static final String TOP_LOCAL_SET_PATH = "/local/all";
-
- private static final String TOP_LOCAL_IMAGE_SET_PATH = "/local/image";
-
- private static final String TOP_LOCAL_VIDEO_SET_PATH = "/local/video";
-
- public static final Comparator<MediaItem> sDateTakenComparator =
- new DateTakenComparator();
-
- private static class DateTakenComparator implements Comparator<MediaItem> {
- @Override
- public int compare(MediaItem item1, MediaItem item2) {
- return -Utils.compare(item1.getDateInMs(), item2.getDateInMs());
- }
- }
-
- private final Handler mDefaultMainHandler;
-
- private GalleryApp mApplication;
- private int mActiveCount = 0;
-
- private HashMap<Uri, NotifyBroker> mNotifierMap =
- new HashMap<Uri, NotifyBroker>();
-
-
- private HashMap<String, MediaSource> mSourceMap =
- new LinkedHashMap<String, MediaSource>();
-
- public DataManager(GalleryApp application) {
- mApplication = application;
- mDefaultMainHandler = new Handler(application.getMainLooper());
- }
-
- public synchronized void initializeSourceMap() {
- if (!mSourceMap.isEmpty()) return;
-
- // the order matters, the UriSource must come last
- addSource(new LocalSource(mApplication));
- addSource(new PicasaSource(mApplication));
- addSource(new ComboSource(mApplication));
- addSource(new ClusterSource(mApplication));
- addSource(new FilterSource(mApplication));
- addSource(new SecureSource(mApplication));
- addSource(new UriSource(mApplication));
- addSource(new SnailSource(mApplication));
-
- if (mActiveCount > 0) {
- for (MediaSource source : mSourceMap.values()) {
- source.resume();
- }
- }
- }
-
- public String getTopSetPath(int typeBits) {
-
- switch (typeBits) {
- case INCLUDE_IMAGE: return TOP_IMAGE_SET_PATH;
- case INCLUDE_VIDEO: return TOP_VIDEO_SET_PATH;
- case INCLUDE_ALL: return TOP_SET_PATH;
- case INCLUDE_LOCAL_IMAGE_ONLY: return TOP_LOCAL_IMAGE_SET_PATH;
- case INCLUDE_LOCAL_VIDEO_ONLY: return TOP_LOCAL_VIDEO_SET_PATH;
- case INCLUDE_LOCAL_ALL_ONLY: return TOP_LOCAL_SET_PATH;
- default: throw new IllegalArgumentException();
- }
- }
-
- // open for debug
- void addSource(MediaSource source) {
- if (source == null) return;
- mSourceMap.put(source.getPrefix(), source);
- }
-
- // A common usage of this method is:
- // synchronized (DataManager.LOCK) {
- // MediaObject object = peekMediaObject(path);
- // if (object == null) {
- // object = createMediaObject(...);
- // }
- // }
- public MediaObject peekMediaObject(Path path) {
- return path.getObject();
- }
-
- public MediaObject getMediaObject(Path path) {
- synchronized (LOCK) {
- MediaObject obj = path.getObject();
- if (obj != null) return obj;
-
- MediaSource source = mSourceMap.get(path.getPrefix());
- if (source == null) {
- Log.w(TAG, "cannot find media source for path: " + path);
- return null;
- }
-
- try {
- MediaObject object = source.createMediaObject(path);
- if (object == null) {
- Log.w(TAG, "cannot create media object: " + path);
- }
- return object;
- } catch (Throwable t) {
- Log.w(TAG, "exception in creating media object: " + path, t);
- return null;
- }
- }
- }
-
- public MediaObject getMediaObject(String s) {
- return getMediaObject(Path.fromString(s));
- }
-
- public MediaSet getMediaSet(Path path) {
- return (MediaSet) getMediaObject(path);
- }
-
- public MediaSet getMediaSet(String s) {
- return (MediaSet) getMediaObject(s);
- }
-
- public MediaSet[] getMediaSetsFromString(String segment) {
- String[] seq = Path.splitSequence(segment);
- int n = seq.length;
- MediaSet[] sets = new MediaSet[n];
- for (int i = 0; i < n; i++) {
- sets[i] = getMediaSet(seq[i]);
- }
- return sets;
- }
-
- // Maps a list of Paths to MediaItems, and invoke consumer.consume()
- // for each MediaItem (may not be in the same order as the input list).
- // An index number is also passed to consumer.consume() to identify
- // the original position in the input list of the corresponding Path (plus
- // startIndex).
- public void mapMediaItems(ArrayList<Path> list, ItemConsumer consumer,
- int startIndex) {
- HashMap<String, ArrayList<PathId>> map =
- new HashMap<String, ArrayList<PathId>>();
-
- // Group the path by the prefix.
- int n = list.size();
- for (int i = 0; i < n; i++) {
- Path path = list.get(i);
- String prefix = path.getPrefix();
- ArrayList<PathId> group = map.get(prefix);
- if (group == null) {
- group = new ArrayList<PathId>();
- map.put(prefix, group);
- }
- group.add(new PathId(path, i + startIndex));
- }
-
- // For each group, ask the corresponding media source to map it.
- for (Entry<String, ArrayList<PathId>> entry : map.entrySet()) {
- String prefix = entry.getKey();
- MediaSource source = mSourceMap.get(prefix);
- source.mapMediaItems(entry.getValue(), consumer);
- }
- }
-
- // The following methods forward the request to the proper object.
- public int getSupportedOperations(Path path) {
- return getMediaObject(path).getSupportedOperations();
- }
-
- public void getPanoramaSupport(Path path, PanoramaSupportCallback callback) {
- getMediaObject(path).getPanoramaSupport(callback);
- }
-
- public void delete(Path path) {
- getMediaObject(path).delete();
- }
-
- public void rotate(Path path, int degrees) {
- getMediaObject(path).rotate(degrees);
- }
-
- public Uri getContentUri(Path path) {
- return getMediaObject(path).getContentUri();
- }
-
- public int getMediaType(Path path) {
- return getMediaObject(path).getMediaType();
- }
-
- public Path findPathByUri(Uri uri, String type) {
- if (uri == null) return null;
- for (MediaSource source : mSourceMap.values()) {
- Path path = source.findPathByUri(uri, type);
- if (path != null) return path;
- }
- return null;
- }
-
- public Path getDefaultSetOf(Path item) {
- MediaSource source = mSourceMap.get(item.getPrefix());
- return source == null ? null : source.getDefaultSetOf(item);
- }
-
- // Returns number of bytes used by cached pictures currently downloaded.
- public long getTotalUsedCacheSize() {
- long sum = 0;
- for (MediaSource source : mSourceMap.values()) {
- sum += source.getTotalUsedCacheSize();
- }
- return sum;
- }
-
- // Returns number of bytes used by cached pictures if all pending
- // downloads and removals are completed.
- public long getTotalTargetCacheSize() {
- long sum = 0;
- for (MediaSource source : mSourceMap.values()) {
- sum += source.getTotalTargetCacheSize();
- }
- return sum;
- }
-
- public void registerChangeNotifier(Uri uri, ChangeNotifier notifier) {
- NotifyBroker broker = null;
- synchronized (mNotifierMap) {
- broker = mNotifierMap.get(uri);
- if (broker == null) {
- broker = new NotifyBroker(mDefaultMainHandler);
- mApplication.getContentResolver()
- .registerContentObserver(uri, true, broker);
- mNotifierMap.put(uri, broker);
- }
- }
- broker.registerNotifier(notifier);
- }
-
- public void resume() {
- if (++mActiveCount == 1) {
- for (MediaSource source : mSourceMap.values()) {
- source.resume();
- }
- }
- }
-
- public void pause() {
- if (--mActiveCount == 0) {
- for (MediaSource source : mSourceMap.values()) {
- source.pause();
- }
- }
- }
-
- private static class NotifyBroker extends ContentObserver {
- private WeakHashMap<ChangeNotifier, Object> mNotifiers =
- new WeakHashMap<ChangeNotifier, Object>();
-
- public NotifyBroker(Handler handler) {
- super(handler);
- }
-
- public synchronized void registerNotifier(ChangeNotifier notifier) {
- mNotifiers.put(notifier, null);
- }
-
- @Override
- public synchronized void onChange(boolean selfChange) {
- for(ChangeNotifier notifier : mNotifiers.keySet()) {
- notifier.onChange(selfChange);
- }
- }
- }
-
- @Override
- public void onStitchingQueued(Uri uri) {
- // Do nothing.
- }
-
- @Override
- public void onStitchingResult(Uri uri) {
- Path path = findPathByUri(uri, null);
- if (path != null) {
- MediaObject mediaObject = getMediaObject(path);
- if (mediaObject != null) {
- mediaObject.clearCachedPanoramaSupport();
- }
- }
- }
-
- @Override
- public void onStitchingProgress(Uri uri, int progress) {
- // Do nothing.
- }
-}
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