com.sun.mail.pop3.AppendStream Maven / Gradle / Ivy
/*
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.mail.pop3;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
/**
* A stream for writing to the temp file, and when done can return a stream for
* reading the data just written. NOTE: We assume that only one thread is
* writing to the file at a time.
*/
class AppendStream extends OutputStream {
private final WritableSharedFile tf;
private RandomAccessFile raf;
private final long start;
private long end;
public AppendStream(WritableSharedFile tf) throws IOException {
this.tf = tf;
raf = tf.getWritableFile();
start = raf.length();
raf.seek(start);
}
@Override
public void write(int b) throws IOException {
raf.write(b);
}
@Override
public void write(byte[] b) throws IOException {
raf.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
raf.write(b, off, len);
}
@Override
public synchronized void close() throws IOException {
end = tf.updateLength();
raf = null; // no more writing allowed
}
public synchronized InputStream getInputStream() throws IOException {
return tf.newStream(start, end);
}
}