/**
* Bobo Browse Engine - High performance faceted/parametric search implementation
* that handles various types of semi-structured data. Written in Java.
*
* Copyright (C) 2005-2006 John Wang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* To contact the project administrators for the bobo-browse project,
* please go to https://sourceforge.net/projects/bobo-browse/, or
* send mail to owner@browseengine.com.
*/
package com.browseengine.bobo.impl;
import java.io.IOException;
import com.browseengine.bobo.api.BoboBrowser;
import com.browseengine.bobo.api.BoboMultiReader;
import com.browseengine.bobo.api.BrowseException;
import com.browseengine.bobo.api.BrowseRequest;
import com.browseengine.bobo.api.BrowseResult;
import com.browseengine.bobo.service.BrowseService;
public class DefaultBrowseServiceImpl implements BrowseService {
private BoboMultiReader _reader;
private boolean _closeReader;
public DefaultBrowseServiceImpl(BoboMultiReader reader) {
super();
_reader = reader;
_closeReader = false;
}
public void setCloseReaderOnCleanup(boolean closeReader) {
_closeReader = closeReader;
}
@Override
public BrowseResult browse(BrowseRequest req) throws BrowseException {
BrowseResult result = BrowseService.EMPTY_RESULT;
if (req.getOffset() < 0) throw new BrowseException("Invalid offset: " + req.getOffset());
if (_reader != null) {
BoboBrowser browser;
try {
browser = new BoboBrowser(_reader);
} catch (IOException e) {
throw new BrowseException("failed to create BoboBrowser", e);
}
result = browser.browse(req);
}
return result;
}
@Override
public void close() throws BrowseException {
if (_closeReader) {
synchronized (this) {
if (_reader != null) {
try {
_reader.close();
_reader = null;
} catch (IOException ioe) {
throw new BrowseException(ioe.getMessage(), ioe);
}
}
}
}
}
}