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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.providers.contacts.debug;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.provider.OpenableColumns;
import java.io.File;
import java.io.FileNotFoundException;
/**
* Provider used to read dump files created by {@link DataExporter}.
*
* We send content: URI to sender apps (such as gmail). This provider implement the URI.
*/
public class DumpFileProvider extends ContentProvider {
public static final String AUTHORITY = "com.android.contacts.dumpfile";
public static final Uri AUTHORITY_URI = Uri.parse("content://" + AUTHORITY);
@Override
public boolean onCreate() {
return true;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
// Not needed.
throw new UnsupportedOperationException();
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// Not needed.
throw new UnsupportedOperationException();
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
// Not needed.
throw new UnsupportedOperationException();
}
@Override
public String getType(Uri uri) {
return DataExporter.ZIP_MIME_TYPE;
}
/** @return the path part of a URI, without the beginning "/". */
private static String extractFileName(Uri uri) {
final String path = uri.getPath();
return path.startsWith("/") ? path.substring(1) : path;
}
/** @return file content */
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
if (!"r".equals(mode)) {
throw new UnsupportedOperationException();
}
final File file = DataExporter.getOutputFile(getContext(), extractFileName(uri));
return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
}
/**
* Used to provide {@link OpenableColumns#DISPLAY_NAME} and {@link OpenableColumns#SIZE}
* for a URI.
*/
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
if (projection == null) throw new IllegalArgumentException("Projection must not be null");
final MatrixCursor c = new MatrixCursor(projection);
// Result will always have one row.
final MatrixCursor.RowBuilder b = c.newRow();
for (int i = 0; i < c.getColumnCount(); i++) {
final String column = projection[i];
if (OpenableColumns.DISPLAY_NAME.equals(column)) {
// Just return the requested path as the display name. We don't care if the file
// really exists.
b.add(extractFileName(uri));
} else if (OpenableColumns.SIZE.equals(column)) {
// Always return "unkown" for file size.
b.add(null);
} else {
throw new IllegalArgumentException("Unknown column " + column);
}
}
return c;
}
}
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