/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.nutsnbolts.xml;
import java.io.IOException;
import java.io.InputStream;
import org.smallmind.nutsnbolts.resource.Resource;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
public class XMLEntityResolver implements EntityResolver {
private static XMLEntityResolver ENTITY_RESOLVER;
private ProtocolResolver protocolResolver;
public synchronized static XMLEntityResolver getInstance () {
if (ENTITY_RESOLVER == null) {
ENTITY_RESOLVER = new XMLEntityResolver(SmallMindProtocolResolver.getInstance());
}
return ENTITY_RESOLVER;
}
public XMLEntityResolver (ProtocolResolver protocolResolver) {
this.protocolResolver = protocolResolver;
}
public InputSource resolveEntity (String publicId, String systemId)
throws SAXException, IOException {
Resource entityResource;
InputStream entityStream;
try {
if ((entityResource = protocolResolver.resolve(systemId)) != null) {
if ((entityStream = entityResource.getInputStream()) != null) {
return new InputSource(entityStream);
}
}
}
catch (Exception exception) {
throw new SAXException(exception);
}
return null;
}
}