/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions copyright 2012 ForgeRock AS.
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*/
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package org.opends.server.protocols.asn1;
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import org.opends.server.types.ByteStringBuilder;
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import java.io.OutputStream;
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import java.io.IOException;
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/**
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* An adapter class that allows writing to an byte string builder
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* with the outputstream interface.
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*/
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final class ByteSequenceOutputStream extends OutputStream {
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private static final int BUFFER_INIT_SIZE = 32;
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private final ByteStringBuilder buffer;
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private final int maxInternalBufferSize;
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/**
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* Creates a new byte string builder output stream.
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*
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* @param buffer
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* The underlying byte string builder.
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* @param maxInternalBufferSize
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* The threshold capacity beyond which internal cached buffers used
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* for encoding and decoding protocol messages will be trimmed after
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* use.
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*/
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ByteSequenceOutputStream(ByteStringBuilder buffer, int maxInternalBufferSize)
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{
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this.buffer = buffer;
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this.maxInternalBufferSize = Math.max(maxInternalBufferSize,
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BUFFER_INIT_SIZE);
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}
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/**
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* {@inheritDoc}
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*/
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public void write(int i) throws IOException {
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buffer.append(((byte) (i & 0xFF)));
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}
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/**
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* {@inheritDoc}
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*/
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public void write(byte[] bytes) throws IOException {
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buffer.append(bytes);
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}
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/**
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* {@inheritDoc}
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*/
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public void write(byte[] bytes, int i, int i1) throws IOException {
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buffer.append(bytes, i, i1);
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}
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/**
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* Gets the length of the underlying byte string builder.
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*
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* @return The length of the underlying byte string builder.
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*/
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int length() {
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return buffer.length();
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}
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/**
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* Writes the content of the underlying byte string builder to the
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* provided output stream.
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*
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* @param stream
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* The output stream.
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* @throws IOException
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* If an I/O error occurs. In particular, an {@code
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* IOException} is thrown if the output stream is closed.
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*/
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void writeTo(OutputStream stream) throws IOException
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{
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buffer.copyTo(stream);
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}
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/**
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* Resets this output stream such that the underlying byte string builder is
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* empty, and also has a capacity which is not too big.
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*/
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void reset()
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{
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if (buffer.capacity() > maxInternalBufferSize)
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{
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buffer.clear(BUFFER_INIT_SIZE);
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}
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else
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{
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buffer.clear();
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}
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}
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/**
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* {@inheritDoc}
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*/
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public void close() throws IOException {
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reset();
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}
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}
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