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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.io;
import com.yahoo.text.Utf8;
import java.io.IOException;
import java.nio.ByteBuffer;
public class Utf8ByteWriter extends AbstractByteWriter {
private ByteBuffer myBuf;
public Utf8ByteWriter(int initialBuffer) {
super(Utf8.getNewEncoder());
myBuf = ByteBuffer.allocate(initialBuffer);
}
@Override
public void send(ByteBuffer src) throws IOException {
if (myBuf.remaining() < src.remaining()) {
ByteBuffer newBuf = ByteBuffer.allocate(Integer.highestOneBit(myBuf.position()+src.remaining()) << 1);
myBuf.flip();
newBuf.put(myBuf);
myBuf = newBuf;
}
myBuf.put(src);
}
@Override
public void flush() throws IOException {
buffer.flush();
}
@Override
public void close() throws IOException {
buffer.flush();
myBuf.flip();
}
/**
* Return a buffer ready for read. Must only be called after writer has been closed.
*
* @return A flipped ByteBuffer
*/
public ByteBuffer getBuf() {
if (myBuf.position() != 0) {
throw new IllegalStateException("Call close() befor getBuf(), pos=" + myBuf.position() + ", limit=" + myBuf.limit());
}
return myBuf;
}
}
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