com.sun.mail.pop3.AppendStream Maven / Gradle / Ivy
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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);
}
}