/*
* 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.InputStream;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.stream.StreamSource;
import org.smallmind.nutsnbolts.resource.Resource;
public class XMLURIResolver implements URIResolver {
private static XMLURIResolver URI_RESOLVER;
private ProtocolResolver protocolResolver;
public synchronized static XMLURIResolver getInstance () {
if (URI_RESOLVER == null) {
URI_RESOLVER = new XMLURIResolver(SmallMindProtocolResolver.getInstance());
}
return URI_RESOLVER;
}
public XMLURIResolver (ProtocolResolver protocolResolver) {
this.protocolResolver = protocolResolver;
}
public Source resolve (String href, String baseHref)
throws TransformerException {
Resource uriResource;
InputStream uriStream;
try {
if ((uriResource = protocolResolver.resolve(href)) != null) {
if ((uriStream = uriResource.getInputStream()) != null) {
return new StreamSource(uriStream);
}
}
}
catch (Exception exception) {
throw new TransformerException(exception);
}
return null;
}
}