/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/search/trunk/search-impl/impl/src/java/org/sakaiproject/search/journal/impl/SegmentListReader.java $
* $Id: SegmentListReader.java 105078 2012-02-24 23:00:38Z ottenhoff@longsight.com $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008 The Sakai Foundation
*
* Licensed under the Educational Community License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.opensource.org/licenses/ECL-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**********************************************************************************/
package org.sakaiproject.search.journal.impl;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* @author ieb
*
*/
public class SegmentListReader
{
private File in;
public SegmentListReader( File in ) {
this.in = in;
}
public List<File> read() throws IOException
{
List<File> segments = new ArrayList<File>();
if ( !in.exists() ) {
return segments;
}
FileInputStream fout = new FileInputStream(in);
DataInputStream din = new DataInputStream(fout);
byte[] sig = new byte[SegmentListStore.SEGMENT_LIST_SIGNATURE.length];
if (din.read(sig) > -1)
{
for (int i = 0; i < sig.length; i++)
{
if (sig[i] != SegmentListStore.SEGMENT_LIST_SIGNATURE[i])
{
throw new IOException(
"Segment List file is corrupt, please remove segments and recover from journal");
}
}
}
int version = din.readInt();
if (version == SegmentListStore.VERSION_SIGNATURE)
{
int n = din.readInt();
for (int i = 0; i < n; i++)
{
segments.add(new File(din.readUTF()));
}
}
else
{
throw new IOException(
"Segment List savePoint not recognised, please remove segments and recover from journal ");
}
din.close();
din.close();
return segments;
}
}