/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2013-2014 ForgeRock AS.
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*/
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package org.opends.server.replication.service;
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import java.io.IOException;
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import java.io.InputStream;
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/**
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* This class creates an input stream that can be used to read entries generated
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* by SynchroLDIF as if they were being read from another source like a file.
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*/
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class ReplInputStream extends InputStream
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{
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/** Indicates whether this input stream has been closed. */
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private boolean closed;
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/** The domain associated to this import. */
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private final ReplicationDomain domain;
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private byte[] bytes;
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private int index;
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/**
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* Creates a new ReplLDIFInputStream that will import entries
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* for a synchronization domain.
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*
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* @param domain The replication domain
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*/
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ReplInputStream(ReplicationDomain domain)
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{
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this.domain = domain;
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closed = false;
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}
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/**
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* Closes this input stream so that no more data may be read from it.
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*/
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@Override
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public void close()
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{
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closed = true;
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}
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/**
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* Reads data from this input stream.
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*
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* @param b The array into which the data should be read.
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* @param off The position in the array at which point the data read may be
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* placed.
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* @param len The maximum number of bytes that may be read into the
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* provided array.
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*
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* @return The number of bytes read from the input stream into the provided
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* array, or -1 if the end of the stream has been reached.
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*
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* @throws IOException If a problem has occurred while generating data for
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* use by this input stream.
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*/
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@Override
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public int read(byte[] b, int off, int len) throws IOException
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{
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if (closed)
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{
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return -1;
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}
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int receivedLength;
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int copiedLength;
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if (bytes == null)
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{
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// First time this method is called or the previous entry was
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// finished. Read a new entry and return it.
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bytes = domain.receiveEntryBytes();
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if (bytes==null)
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{
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closed = true;
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return -1;
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}
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receivedLength = bytes.length;
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index = 0;
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}
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else
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{
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// Some data was left from the previous entry, feed the read with this
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// data.
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receivedLength = bytes.length - index;
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}
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if (receivedLength <= len)
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{
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copiedLength = receivedLength;
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}
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else
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{
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copiedLength = len;
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}
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System.arraycopy(bytes, index, b, off, copiedLength);
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index += copiedLength;
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if (index == bytes.length)
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{
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bytes = null;
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}
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return copiedLength;
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}
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/**
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* Reads a single byte of data from this input stream.
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*
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* @return The byte read from the input stream, or -1 if the end of the
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* stream has been reached.
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*
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* @throws IOException If a problem has occurred while generating data for
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* use by this input stream.
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*/
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@Override
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public int read() throws IOException
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{
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if (closed) {
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return -1;
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}
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byte[] b = new byte[1];
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if (read(b, 0, 1) == 0) {
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throw new IOException();
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}
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return b[0];
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}
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}
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