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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
* 2013 Florian Schmaus <flo@geekplace.eu>
*
* 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 org.openintents.openpgp.util;
import android.os.ParcelFileDescriptor;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Partially based on <a href="http://stackoverflow.com/questions/18212152/">Stackoverflow: Transfer InputStream to another Service (across process boundaries)</a>
**/
public class ParcelFileDescriptorUtil {
public interface IThreadListener {
void onThreadFinished(final Thread thread);
}
public static ParcelFileDescriptor pipeFrom(InputStream inputStream, IThreadListener listener)
throws IOException {
ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
ParcelFileDescriptor readSide = pipe[0];
ParcelFileDescriptor writeSide = pipe[1];
// start the transfer thread
new TransferThread(inputStream, new ParcelFileDescriptor.AutoCloseOutputStream(writeSide),
listener)
.start();
return readSide;
}
public static ParcelFileDescriptor pipeTo(OutputStream outputStream, IThreadListener listener)
throws IOException {
ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
ParcelFileDescriptor readSide = pipe[0];
ParcelFileDescriptor writeSide = pipe[1];
// start the transfer thread
new TransferThread(new ParcelFileDescriptor.AutoCloseInputStream(readSide), outputStream,
listener)
.start();
return writeSide;
}
static class TransferThread extends Thread {
final InputStream mIn;
final OutputStream mOut;
final IThreadListener mListener;
TransferThread(InputStream in, OutputStream out, IThreadListener listener) {
super("ParcelFileDescriptor Transfer Thread");
mIn = in;
mOut = out;
mListener = listener;
setDaemon(true);
}
@Override
public void run() {
byte[] buf = new byte[1024];
int len;
try {
while ((len = mIn.read(buf)) > 0) {
mOut.write(buf, 0, len);
}
mOut.flush(); // just to be safe
} catch (IOException e) {
//Log.e(OpenPgpApi.TAG, "TransferThread" + getId() + ": writing failed", e);
} finally {
try {
mIn.close();
} catch (IOException e) {
//Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
}
try {
mOut.close();
} catch (IOException e) {
//Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
}
}
if (mListener != null) {
//Log.d(OpenPgpApi.TAG, "TransferThread " + getId() + " finished!");
mListener.onThreadFinished(this);
}
}
}
}
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