/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2006-2008 Sun Microsystems, Inc.
* Portions Copyright 2013 ForgeRock AS.
*/
package org.opends.server.replication.service;
import java.io.IOException;
import java.io.InputStream;
/**
* This class creates an input stream that can be used to read entries generated
* by SynchroLDIF as if they were being read from another source like a file.
*/
public class ReplInputStream
extends InputStream
{
// Indicates whether this input stream has been closed.
private boolean closed;
// The domain associated to this import.
ReplicationDomain domain;
private byte[] bytes;
private int index;
/**
* Creates a new ReplLDIFInputStream that will import entries
* for a synchronization domain.
*
* @param domain The replication domain
*/
public ReplInputStream(ReplicationDomain domain)
{
this.domain = domain;
closed = false;
}
/**
* Closes this input stream so that no more data may be read from it.
*/
public void close()
{
closed = true;
}
/**
* Reads data from this input stream.
*
* @param b The array into which the data should be read.
* @param off The position in the array at which point the data read may be
* placed.
* @param len The maximum number of bytes that may be read into the
* provided array.
*
* @return The number of bytes read from the input stream into the provided
* array, or -1 if the end of the stream has been reached.
*
* @throws IOException If a problem has occurred while generating data for
* use by this input stream.
*/
public int read(byte[] b, int off, int len)
throws IOException
{
if (closed)
return -1;
int receivedLength;
int copiedLength;
if (bytes == null)
{
// First time this method is called or the previous entry was
// finished. Read a new entry and return it.
bytes = domain.receiveEntryBytes();
if (bytes==null)
{
closed = true;
return -1;
}
receivedLength = bytes.length;
index = 0;
}
else
{
// Some data was left from the previous entry, feed the read with this
// data.
receivedLength = bytes.length - index;
}
if (receivedLength <= len)
{
copiedLength = receivedLength;
}
else
{
copiedLength = len;
}
System.arraycopy(bytes, index, b, off, copiedLength);
index += copiedLength;
if (index == bytes.length)
bytes = null;
return copiedLength;
}
/**
* Reads a single byte of data from this input stream.
*
* @return The byte read from the input stream, or -1 if the end of the
* stream has been reached.
*
* @throws IOException If a problem has occurred while generating data for
* use by this input stream.
*/
public int read()
throws IOException
{
if (closed) {
return -1;
}
byte[] b = new byte[1];
if (read(b, 0, 1) == 0) {
throw new IOException();
}
return ((int)b[0]);
}
}