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/*
* Copyright (C) 2012 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.filtershow.provider;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.net.Uri;
import android.os.ConditionVariable;
import android.os.ParcelFileDescriptor;
import android.provider.BaseColumns;
import android.provider.MediaStore;
import android.provider.OpenableColumns;
import java.io.File;
import java.io.FileNotFoundException;
public class SharedImageProvider extends ContentProvider {
private static final String LOGTAG = "SharedImageProvider";
public static final String MIME_TYPE = "image/jpeg";
public static final String AUTHORITY = "com.android.gallery3d.filtershow.provider.SharedImageProvider";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/image");
public static final String PREPARE = "prepare";
private final String[] mMimeStreamType = {
MIME_TYPE
};
private static ConditionVariable mImageReadyCond = new ConditionVariable(false);
@Override
public int delete(Uri arg0, String arg1, String[] arg2) {
return 0;
}
@Override
public String getType(Uri arg0) {
return MIME_TYPE;
}
@Override
public String[] getStreamTypes(Uri arg0, String mimeTypeFilter) {
return mMimeStreamType;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
if (values.containsKey(PREPARE)) {
if (values.getAsBoolean(PREPARE)) {
mImageReadyCond.close();
} else {
mImageReadyCond.open();
}
}
return null;
}
@Override
public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
return 0;
}
@Override
public boolean onCreate() {
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
String uriPath = uri.getLastPathSegment();
if (uriPath == null) {
return null;
}
if (projection == null) {
projection = new String[] {
BaseColumns._ID,
MediaStore.MediaColumns.DATA,
OpenableColumns.DISPLAY_NAME,
OpenableColumns.SIZE
};
}
// If we receive a query on display name or size,
// we should block until the image is ready
mImageReadyCond.block();
File path = new File(uriPath);
MatrixCursor cursor = new MatrixCursor(projection);
Object[] columns = new Object[projection.length];
for (int i = 0; i < projection.length; i++) {
if (projection[i].equalsIgnoreCase(BaseColumns._ID)) {
columns[i] = 0;
} else if (projection[i].equalsIgnoreCase(MediaStore.MediaColumns.DATA)) {
columns[i] = uri;
} else if (projection[i].equalsIgnoreCase(OpenableColumns.DISPLAY_NAME)) {
columns[i] = path.getName();
} else if (projection[i].equalsIgnoreCase(OpenableColumns.SIZE)) {
columns[i] = path.length();
}
}
cursor.addRow(columns);
return cursor;
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode)
throws FileNotFoundException {
String uriPath = uri.getLastPathSegment();
if (uriPath == null) {
return null;
}
// Here we need to block until the image is ready
mImageReadyCond.block();
File path = new File(uriPath);
int imode = 0;
imode |= ParcelFileDescriptor.MODE_READ_ONLY;
return ParcelFileDescriptor.open(path, imode);
}
}
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