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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 android.content.res;
import java.io.File;
import java.io.IOException;
/**
* Class to scan Opaque Binary Blob (OBB) files. Use this to get information
* about an OBB file for use in a program via {@link ObbInfo}.
*/
public class ObbScanner {
// Don't allow others to instantiate this class
private ObbScanner() {}
/**
* Scan a file for OBB information.
*
* @param filePath path to the OBB file to be scanned.
* @return ObbInfo object information corresponding to the file path
* @throws IllegalArgumentException if the OBB file couldn't be found
* @throws IOException if the OBB file couldn't be read
*/
public static ObbInfo getObbInfo(String filePath) throws IOException {
if (filePath == null) {
throw new IllegalArgumentException("file path cannot be null");
}
final File obbFile = new File(filePath);
if (!obbFile.exists()) {
throw new IllegalArgumentException("OBB file does not exist: " + filePath);
}
/*
* XXX This will fail to find the real canonical path if bind mounts are
* used, but we don't use any bind mounts right now.
*/
final String canonicalFilePath = obbFile.getCanonicalPath();
ObbInfo obbInfo = new ObbInfo();
obbInfo.filename = canonicalFilePath;
getObbInfo_native(canonicalFilePath, obbInfo);
return obbInfo;
}
private native static void getObbInfo_native(String filePath, ObbInfo obbInfo)
throws IOException;
}
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