org.ow2.spec.testengine.xml.SchemaEntityResolver Maven / Gradle / Ivy
/**
* EasyBeans
* Copyright (C) 2006 Bull S.A.S.
* Contact: [email protected]
*
* 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id:SchemaEntityResolver.java 1477 2007-06-16 16:50:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.spec.testengine.xml;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Entity resolver allowing to find schema within the classloader.
* @author Florent Benoit
*/
public class SchemaEntityResolver implements EntityResolver {
/**
* Map where the schemas URLs are stored.
*/
private Map schemasUrls = null;
/**
* Constructor. Finds the XSD with classloader.
* @param schemas the name of the schemas to resolve.
*/
public SchemaEntityResolver(final String[] schemas) {
schemasUrls = new HashMap();
URL url = null;
for (int i = 0; i < schemas.length; i++) {
url = SchemaEntityResolver.class.getResource("/" + schemas[i]);
if (url == null) {
throw new IllegalStateException("'" + schemas[i] + "' was not found in the current classloader !");
}
String urlString = url.toString();
String id = urlString.substring(urlString.lastIndexOf('/') + 1);
schemasUrls.put(id, urlString);
}
}
/**
* The Parser will call this method before opening any external entity
* except the top-level document entity.
* @param publicId The public identifier of the external entity being
* referenced, or null if none was supplied.
* @param systemId The system identifier of the external entity being
* referenced.
* @return An InputSource object describing the new input source, or null to
* request that the parser open a regular URI connection to the
* system identifier.
* @throws SAXException Any SAX exception, possibly wrapping another
* exception.
* @throws IOException A Java-specific IO exception, possibly the result of
* creating a new InputStream or Reader for the InputSource.
*/
public InputSource resolveEntity(final String publicId, final String systemId) throws IOException, SAXException {
String localPath = null;
if (systemId != null) {
// Can be a schema
if (systemId.toLowerCase().endsWith(".xsd")) {
// Retrieve basename
String baseName = systemId.substring(systemId.lastIndexOf('/') + 1);
// Registred ?
localPath = schemasUrls.get(baseName);
}
}
// schema not found
if (localPath == null) {
throw new SAXException("No XSD found for '" + systemId + "'.");
}
// Return the local path source
return (new InputSource(localPath));
}
}