/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2010 The eXist Project
* http://exist-db.org
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id$
*/
package org.exist.validation.resolver;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.xerces.xni.XMLResourceIdentifier;
import org.apache.xerces.xni.XNIException;
import org.apache.xerces.xni.parser.XMLEntityResolver;
import org.apache.xerces.xni.parser.XMLInputSource;
import org.exist.protocolhandler.embedded.EmbeddedInputStream;
import org.exist.protocolhandler.xmldb.XmldbURL;
import org.exist.protocolhandler.xmlrpc.XmlrpcInputStream;
/**
* Resolve a resource specified by xs:anyURI. First time the
* resource is resolved by the URL as specified in the constructor,
* the second the URL of the ExpandedSystemId is used.
*
* @author Dannes Wessels (dizzzz@exist-db.org)
*/
public class AnyUriResolver implements XMLEntityResolver {
private final static Logger LOG = LogManager.getLogger(AnyUriResolver.class);
private String docPath;
private final String parentURI;
private boolean firstTime=true;
/** Creates a new instance of AnyUriResolver */
public AnyUriResolver(String path) {
docPath=path;
if(docPath.startsWith("/")){
docPath="xmldb:exist://"+docPath;
}
LOG.debug("Specified path="+path);
if(path.lastIndexOf('/')!=-1){
parentURI=path.substring(0, path.lastIndexOf('/'));
LOG.debug("parentURI="+parentURI);
} else {
parentURI="";
}
}
@Override
public XMLInputSource resolveEntity(XMLResourceIdentifier xri) throws XNIException, IOException {
if (xri.getExpandedSystemId() == null && xri.getLiteralSystemId() == null
&& xri.getNamespace() == null && xri.getPublicId() == null) {
// quick fail
return null;
}
if (LOG.isDebugEnabled()) {
LOG.debug("Resolving XMLResourceIdentifier: " + getXriDetails(xri));
}
String resourcePath = null;
String baseSystemId = null;
if (firstTime) {
// First time use constructor supplied path
resourcePath = docPath;
baseSystemId = parentURI;
xri.setExpandedSystemId(docPath);
firstTime = false;
} else {
resourcePath = xri.getExpandedSystemId();
}
xri.setBaseSystemId(docPath);
LOG.debug("resourcePath='" + resourcePath + "'");
// prevent NPE
if (resourcePath == null) {
return null;
}
InputStream is = null;
if (resourcePath.startsWith("xmldb:")) {
final XmldbURL xmldbURL = new XmldbURL(resourcePath);
if (xmldbURL.isEmbedded()) {
is = new EmbeddedInputStream(xmldbURL);
} else {
is = new XmlrpcInputStream(xmldbURL);
}
} else {
is = new URL(resourcePath).openStream();
}
final XMLInputSource xis = new XMLInputSource(xri.getPublicId(), resourcePath,
baseSystemId, is, "UTF-8");
if (LOG.isDebugEnabled()) {
LOG.debug("XMLInputSource: " + getXisDetails(xis));
}
return xis;
}
private String getXriDetails(XMLResourceIdentifier xrid){
return "PublicId='" + xrid.getPublicId() + "' " + "BaseSystemId='" + xrid.getBaseSystemId() + "' " + "ExpandedSystemId='" + xrid.getExpandedSystemId() + "' " + "LiteralSystemId='" + xrid.getLiteralSystemId() + "' " + "Namespace='" + xrid.getNamespace() + "' ";
}
private String getXisDetails(XMLInputSource xis){
return "PublicId='" + xis.getPublicId() + "' " + "SystemId='" + xis.getSystemId() + "' " + "BaseSystemId='" + xis.getBaseSystemId() + "' " + "Encoding='" + xis.getEncoding() + "' ";
}
}