src/com/android/gallery3d/data/LocalSource.java - platform/packages/apps/Gallery2 - Git at Google

 /*
  * 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.ContentProviderClient;
 import android.content.ContentUris;
 import android.content.UriMatcher;
 import android.net.Uri;
 import android.provider.MediaStore;

 import com.android.gallery3d.app.Gallery;
 import com.android.gallery3d.app.GalleryApp;
 import com.android.gallery3d.data.MediaSet.ItemConsumer;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;

 class LocalSource extends MediaSource {

     public static final String KEY_BUCKET_ID = "bucketId";

     private GalleryApp mApplication;
     private PathMatcher mMatcher;
     private static final int NO_MATCH = -1;
     private final UriMatcher mUriMatcher = new UriMatcher(NO_MATCH);
     public static final Comparator<PathId> sIdComparator = new IdComparator();

     private static final int LOCAL_IMAGE_ALBUMSET = 0;
     private static final int LOCAL_VIDEO_ALBUMSET = 1;
     private static final int LOCAL_IMAGE_ALBUM = 2;
     private static final int LOCAL_VIDEO_ALBUM = 3;
     private static final int LOCAL_IMAGE_ITEM = 4;
     private static final int LOCAL_VIDEO_ITEM = 5;
     private static final int LOCAL_ALL_ALBUMSET = 6;
     private static final int LOCAL_ALL_ALBUM = 7;

     private static final String TAG = "LocalSource";

     private ContentProviderClient mClient;

     public LocalSource(GalleryApp context) {
         super("local");
         mApplication = context;
         mMatcher = new PathMatcher();
         mMatcher.add("/local/image", LOCAL_IMAGE_ALBUMSET);
         mMatcher.add("/local/video", LOCAL_VIDEO_ALBUMSET);
         mMatcher.add("/local/all", LOCAL_ALL_ALBUMSET);

         mMatcher.add("/local/image/*", LOCAL_IMAGE_ALBUM);
         mMatcher.add("/local/video/*", LOCAL_VIDEO_ALBUM);
         mMatcher.add("/local/all/*", LOCAL_ALL_ALBUM);
         mMatcher.add("/local/image/item/*", LOCAL_IMAGE_ITEM);
         mMatcher.add("/local/video/item/*", LOCAL_VIDEO_ITEM);

         mUriMatcher.addURI(MediaStore.AUTHORITY,
                 "external/images/media/#", LOCAL_IMAGE_ITEM);
         mUriMatcher.addURI(MediaStore.AUTHORITY,
                 "external/video/media/#", LOCAL_VIDEO_ITEM);
         mUriMatcher.addURI(MediaStore.AUTHORITY,
                 "external/images/media", LOCAL_IMAGE_ALBUM);
         mUriMatcher.addURI(MediaStore.AUTHORITY,
                 "external/video/media", LOCAL_VIDEO_ALBUM);
         mUriMatcher.addURI(MediaStore.AUTHORITY,
                 "external/file", LOCAL_ALL_ALBUM);
     }

     @Override
     public MediaObject createMediaObject(Path path) {
         GalleryApp app = mApplication;
         switch (mMatcher.match(path)) {
             case LOCAL_ALL_ALBUMSET:
             case LOCAL_IMAGE_ALBUMSET:
             case LOCAL_VIDEO_ALBUMSET:
                 return new LocalAlbumSet(path, mApplication);
             case LOCAL_IMAGE_ALBUM:
                 return new LocalAlbum(path, app, mMatcher.getIntVar(0), true);
             case LOCAL_VIDEO_ALBUM:
                 return new LocalAlbum(path, app, mMatcher.getIntVar(0), false);
             case LOCAL_ALL_ALBUM: {
                 int bucketId = mMatcher.getIntVar(0);
                 DataManager dataManager = app.getDataManager();
                 MediaSet imageSet = (MediaSet) dataManager.getMediaObject(
                         LocalAlbumSet.PATH_IMAGE.getChild(bucketId));
                 MediaSet videoSet = (MediaSet) dataManager.getMediaObject(
                         LocalAlbumSet.PATH_VIDEO.getChild(bucketId));
                 Comparator<MediaItem> comp = DataManager.sDateTakenComparator;
                 return new LocalMergeAlbum(
                         path, comp, new MediaSet[] {imageSet, videoSet}, bucketId);
             }
             case LOCAL_IMAGE_ITEM:
                 return new LocalImage(path, mApplication, mMatcher.getIntVar(0));
             case LOCAL_VIDEO_ITEM:
                 return new LocalVideo(path, mApplication, mMatcher.getIntVar(0));
             default:
                 throw new RuntimeException("bad path: " + path);
         }
     }

     private static int getMediaType(String type, int defaultType) {
         if (type == null) return defaultType;
         try {
             int value = Integer.parseInt(type);
             if ((value & (MEDIA_TYPE_IMAGE
                     | MEDIA_TYPE_VIDEO)) != 0) return value;
         } catch (NumberFormatException e) {
             Log.w(TAG, "invalid type: " + type, e);
         }
         return defaultType;
     }

     // The media type bit passed by the intent
     private static final int MEDIA_TYPE_ALL = 0;
     private static final int MEDIA_TYPE_IMAGE = 1;
     private static final int MEDIA_TYPE_VIDEO = 4;

     private Path getAlbumPath(Uri uri, int defaultType) {
         int mediaType = getMediaType(
                 uri.getQueryParameter(Gallery.KEY_MEDIA_TYPES),
                 defaultType);
         String bucketId = uri.getQueryParameter(KEY_BUCKET_ID);
         int id = 0;
         try {
             id = Integer.parseInt(bucketId);
         } catch (NumberFormatException e) {
             Log.w(TAG, "invalid bucket id: " + bucketId, e);
             return null;
         }
         switch (mediaType) {
             case MEDIA_TYPE_IMAGE:
                 return Path.fromString("/local/image").getChild(id);
             case MEDIA_TYPE_VIDEO:
                 return Path.fromString("/local/video").getChild(id);
             default:
                 return Path.fromString("/local/all").getChild(id);
         }
     }

     @Override
     public Path findPathByUri(Uri uri, String type) {
         try {
             switch (mUriMatcher.match(uri)) {
                 case LOCAL_IMAGE_ITEM: {
                     long id = ContentUris.parseId(uri);
                     return id >= 0 ? LocalImage.ITEM_PATH.getChild(id) : null;
                 }
                 case LOCAL_VIDEO_ITEM: {
                     long id = ContentUris.parseId(uri);
                     return id >= 0 ? LocalVideo.ITEM_PATH.getChild(id) : null;
                 }
                 case LOCAL_IMAGE_ALBUM: {
                     return getAlbumPath(uri, MEDIA_TYPE_IMAGE);
                 }
                 case LOCAL_VIDEO_ALBUM: {
                     return getAlbumPath(uri, MEDIA_TYPE_VIDEO);
                 }
                 case LOCAL_ALL_ALBUM: {
                     return getAlbumPath(uri, MEDIA_TYPE_ALL);
                 }
             }
         } catch (NumberFormatException e) {
             Log.w(TAG, "uri: " + uri.toString(), e);
         }
         return null;
     }

     @Override
     public Path getDefaultSetOf(Path item) {
         MediaObject object = mApplication.getDataManager().getMediaObject(item);
         if (object instanceof LocalMediaItem) {
             return Path.fromString("/local/all").getChild(
                     String.valueOf(((LocalMediaItem) object).getBucketId()));
         }
         return null;
     }

     @Override
     public void mapMediaItems(ArrayList<PathId> list, ItemConsumer consumer) {
         ArrayList<PathId> imageList = new ArrayList<PathId>();
         ArrayList<PathId> videoList = new ArrayList<PathId>();
         int n = list.size();
         for (int i = 0; i < n; i++) {
             PathId pid = list.get(i);
             // We assume the form is: "/local/{image,video}/item/#"
             // We don't use mMatcher for efficiency's reason.
             Path parent = pid.path.getParent();
             if (parent == LocalImage.ITEM_PATH) {
                 imageList.add(pid);
             } else if (parent == LocalVideo.ITEM_PATH) {
                 videoList.add(pid);
             }
         }
         // TODO: use "files" table so we can merge the two cases.
         processMapMediaItems(imageList, consumer, true);
         processMapMediaItems(videoList, consumer, false);
     }

     private void processMapMediaItems(ArrayList<PathId> list,
             ItemConsumer consumer, boolean isImage) {
         // Sort path by path id
         Collections.sort(list, sIdComparator);
         int n = list.size();
         for (int i = 0; i < n; ) {
             PathId pid = list.get(i);

             // Find a range of items.
             ArrayList<Integer> ids = new ArrayList<Integer>();
             int startId = Integer.parseInt(pid.path.getSuffix());
             ids.add(startId);

             int j;
             for (j = i + 1; j < n; j++) {
                 PathId pid2 = list.get(j);
                 int curId = Integer.parseInt(pid2.path.getSuffix());
                 if (curId - startId >= MediaSet.MEDIAITEM_BATCH_FETCH_COUNT) {
                     break;
                 }
                 ids.add(curId);
             }

             MediaItem[] items = LocalAlbum.getMediaItemById(
                     mApplication, isImage, ids);
             for(int k = i ; k < j; k++) {
                 PathId pid2 = list.get(k);
                 consumer.consume(pid2.id, items[k - i]);
             }

             i = j;
         }
     }

     // This is a comparator which compares the suffix number in two Paths.
     private static class IdComparator implements Comparator<PathId> {
         public int compare(PathId p1, PathId p2) {
             String s1 = p1.path.getSuffix();
             String s2 = p2.path.getSuffix();
             int len1 = s1.length();
             int len2 = s2.length();
             if (len1 < len2) {
                 return -1;
             } else if (len1 > len2) {
                 return 1;
             } else {
                 return s1.compareTo(s2);
             }
         }
     }

     @Override
     public void resume() {
         mClient = mApplication.getContentResolver()
                 .acquireContentProviderClient(MediaStore.AUTHORITY);
     }

     @Override
     public void pause() {
         mClient.release();
         mClient = null;
     }
 }
	/*
	* 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.ContentProviderClient;
	import android.content.ContentUris;
	import android.content.UriMatcher;
	import android.net.Uri;
	import android.provider.MediaStore;

	import com.android.gallery3d.app.Gallery;
	import com.android.gallery3d.app.GalleryApp;
	import com.android.gallery3d.data.MediaSet.ItemConsumer;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Comparator;

	class LocalSource extends MediaSource {

	public static final String KEY_BUCKET_ID = "bucketId";

	private GalleryApp mApplication;
	private PathMatcher mMatcher;
	private static final int NO_MATCH = -1;
	private final UriMatcher mUriMatcher = new UriMatcher(NO_MATCH);
	public static final Comparator<PathId> sIdComparator = new IdComparator();

	private static final int LOCAL_IMAGE_ALBUMSET = 0;
	private static final int LOCAL_VIDEO_ALBUMSET = 1;
	private static final int LOCAL_IMAGE_ALBUM = 2;
	private static final int LOCAL_VIDEO_ALBUM = 3;
	private static final int LOCAL_IMAGE_ITEM = 4;
	private static final int LOCAL_VIDEO_ITEM = 5;
	private static final int LOCAL_ALL_ALBUMSET = 6;
	private static final int LOCAL_ALL_ALBUM = 7;

	private static final String TAG = "LocalSource";

	private ContentProviderClient mClient;

	public LocalSource(GalleryApp context) {
	super("local");
	mApplication = context;
	mMatcher = new PathMatcher();
	mMatcher.add("/local/image", LOCAL_IMAGE_ALBUMSET);
	mMatcher.add("/local/video", LOCAL_VIDEO_ALBUMSET);
	mMatcher.add("/local/all", LOCAL_ALL_ALBUMSET);

	mMatcher.add("/local/image/*", LOCAL_IMAGE_ALBUM);
	mMatcher.add("/local/video/*", LOCAL_VIDEO_ALBUM);
	mMatcher.add("/local/all/*", LOCAL_ALL_ALBUM);
	mMatcher.add("/local/image/item/*", LOCAL_IMAGE_ITEM);
	mMatcher.add("/local/video/item/*", LOCAL_VIDEO_ITEM);

	mUriMatcher.addURI(MediaStore.AUTHORITY,
	"external/images/media/#", LOCAL_IMAGE_ITEM);
	mUriMatcher.addURI(MediaStore.AUTHORITY,
	"external/video/media/#", LOCAL_VIDEO_ITEM);
	mUriMatcher.addURI(MediaStore.AUTHORITY,
	"external/images/media", LOCAL_IMAGE_ALBUM);
	mUriMatcher.addURI(MediaStore.AUTHORITY,
	"external/video/media", LOCAL_VIDEO_ALBUM);
	mUriMatcher.addURI(MediaStore.AUTHORITY,
	"external/file", LOCAL_ALL_ALBUM);
	}

	@Override
	public MediaObject createMediaObject(Path path) {
	GalleryApp app = mApplication;
	switch (mMatcher.match(path)) {
	case LOCAL_ALL_ALBUMSET:
	case LOCAL_IMAGE_ALBUMSET:
	case LOCAL_VIDEO_ALBUMSET:
	return new LocalAlbumSet(path, mApplication);
	case LOCAL_IMAGE_ALBUM:
	return new LocalAlbum(path, app, mMatcher.getIntVar(0), true);
	case LOCAL_VIDEO_ALBUM:
	return new LocalAlbum(path, app, mMatcher.getIntVar(0), false);
	case LOCAL_ALL_ALBUM: {
	int bucketId = mMatcher.getIntVar(0);
	DataManager dataManager = app.getDataManager();
	MediaSet imageSet = (MediaSet) dataManager.getMediaObject(
	LocalAlbumSet.PATH_IMAGE.getChild(bucketId));
	MediaSet videoSet = (MediaSet) dataManager.getMediaObject(
	LocalAlbumSet.PATH_VIDEO.getChild(bucketId));
	Comparator<MediaItem> comp = DataManager.sDateTakenComparator;
	return new LocalMergeAlbum(
	path, comp, new MediaSet[] {imageSet, videoSet}, bucketId);
	}
	case LOCAL_IMAGE_ITEM:
	return new LocalImage(path, mApplication, mMatcher.getIntVar(0));
	case LOCAL_VIDEO_ITEM:
	return new LocalVideo(path, mApplication, mMatcher.getIntVar(0));
	default:
	throw new RuntimeException("bad path: " + path);
	}
	}

	private static int getMediaType(String type, int defaultType) {
	if (type == null) return defaultType;
	try {
	int value = Integer.parseInt(type);
	if ((value & (MEDIA_TYPE_IMAGE
	\| MEDIA_TYPE_VIDEO)) != 0) return value;
	} catch (NumberFormatException e) {
	Log.w(TAG, "invalid type: " + type, e);
	}
	return defaultType;
	}

	// The media type bit passed by the intent
	private static final int MEDIA_TYPE_ALL = 0;
	private static final int MEDIA_TYPE_IMAGE = 1;
	private static final int MEDIA_TYPE_VIDEO = 4;

	private Path getAlbumPath(Uri uri, int defaultType) {
	int mediaType = getMediaType(
	uri.getQueryParameter(Gallery.KEY_MEDIA_TYPES),
	defaultType);
	String bucketId = uri.getQueryParameter(KEY_BUCKET_ID);
	int id = 0;
	try {
	id = Integer.parseInt(bucketId);
	} catch (NumberFormatException e) {
	Log.w(TAG, "invalid bucket id: " + bucketId, e);
	return null;
	}
	switch (mediaType) {
	case MEDIA_TYPE_IMAGE:
	return Path.fromString("/local/image").getChild(id);
	case MEDIA_TYPE_VIDEO:
	return Path.fromString("/local/video").getChild(id);
	default:
	return Path.fromString("/local/all").getChild(id);
	}
	}

	@Override
	public Path findPathByUri(Uri uri, String type) {
	try {
	switch (mUriMatcher.match(uri)) {
	case LOCAL_IMAGE_ITEM: {
	long id = ContentUris.parseId(uri);
	return id >= 0 ? LocalImage.ITEM_PATH.getChild(id) : null;
	}
	case LOCAL_VIDEO_ITEM: {
	long id = ContentUris.parseId(uri);
	return id >= 0 ? LocalVideo.ITEM_PATH.getChild(id) : null;
	}
	case LOCAL_IMAGE_ALBUM: {
	return getAlbumPath(uri, MEDIA_TYPE_IMAGE);
	}
	case LOCAL_VIDEO_ALBUM: {
	return getAlbumPath(uri, MEDIA_TYPE_VIDEO);
	}
	case LOCAL_ALL_ALBUM: {
	return getAlbumPath(uri, MEDIA_TYPE_ALL);
	}
	}
	} catch (NumberFormatException e) {
	Log.w(TAG, "uri: " + uri.toString(), e);
	}
	return null;
	}

	@Override
	public Path getDefaultSetOf(Path item) {
	MediaObject object = mApplication.getDataManager().getMediaObject(item);
	if (object instanceof LocalMediaItem) {
	return Path.fromString("/local/all").getChild(
	String.valueOf(((LocalMediaItem) object).getBucketId()));
	}
	return null;
	}

	@Override
	public void mapMediaItems(ArrayList<PathId> list, ItemConsumer consumer) {
	ArrayList<PathId> imageList = new ArrayList<PathId>();
	ArrayList<PathId> videoList = new ArrayList<PathId>();
	int n = list.size();
	for (int i = 0; i < n; i++) {
	PathId pid = list.get(i);
	// We assume the form is: "/local/{image,video}/item/#"
	// We don't use mMatcher for efficiency's reason.
	Path parent = pid.path.getParent();
	if (parent == LocalImage.ITEM_PATH) {
	imageList.add(pid);
	} else if (parent == LocalVideo.ITEM_PATH) {
	videoList.add(pid);
	}
	}
	// TODO: use "files" table so we can merge the two cases.
	processMapMediaItems(imageList, consumer, true);
	processMapMediaItems(videoList, consumer, false);
	}

	private void processMapMediaItems(ArrayList<PathId> list,
	ItemConsumer consumer, boolean isImage) {
	// Sort path by path id
	Collections.sort(list, sIdComparator);
	int n = list.size();
	for (int i = 0; i < n; ) {
	PathId pid = list.get(i);

	// Find a range of items.
	ArrayList<Integer> ids = new ArrayList<Integer>();
	int startId = Integer.parseInt(pid.path.getSuffix());
	ids.add(startId);

	int j;
	for (j = i + 1; j < n; j++) {
	PathId pid2 = list.get(j);
	int curId = Integer.parseInt(pid2.path.getSuffix());
	if (curId - startId >= MediaSet.MEDIAITEM_BATCH_FETCH_COUNT) {
	break;
	}
	ids.add(curId);
	}

	MediaItem[] items = LocalAlbum.getMediaItemById(
	mApplication, isImage, ids);
	for(int k = i ; k < j; k++) {
	PathId pid2 = list.get(k);
	consumer.consume(pid2.id, items[k - i]);
	}

	i = j;
	}
	}

	// This is a comparator which compares the suffix number in two Paths.
	private static class IdComparator implements Comparator<PathId> {
	public int compare(PathId p1, PathId p2) {
	String s1 = p1.path.getSuffix();
	String s2 = p2.path.getSuffix();
	int len1 = s1.length();
	int len2 = s2.length();
	if (len1 < len2) {
	return -1;
	} else if (len1 > len2) {
	return 1;
	} else {
	return s1.compareTo(s2);
	}
	}
	}

	@Override
	public void resume() {
	mClient = mApplication.getContentResolver()
	.acquireContentProviderClient(MediaStore.AUTHORITY);
	}

	@Override
	public void pause() {
	mClient.release();
	mClient = null;
	}
	}