/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.xb.binding.sunday.unmarshalling;
import java.io.InputStream;
import java.net.URL;
import org.jboss.util.xml.JBossEntityResolver;
import org.jboss.logging.Logger;
import org.xml.sax.InputSource;
/**
* A default SchemaBindingResolver that uses a JBossEntityResolver to locate
* the schema xsd.
*
* @author Scott.Stark@jboss.org
* @version $Revision: 1455 $
*/
public class DefaultSchemaResolver
implements SchemaBindingResolver
{
private static Logger log = Logger.getLogger(DefaultSchemaResolver.class);
private String baseURI;
private JBossEntityResolver resolver;
public DefaultSchemaResolver()
{
this(new JBossEntityResolver());
}
public DefaultSchemaResolver(JBossEntityResolver resolver)
{
this.resolver = resolver;
}
public String getBaseURI()
{
return baseURI;
}
public void setBaseURI(String baseURI)
{
this.baseURI = baseURI;
}
/**
* The uses the JBossEntityResolver.resolveEntity by:
* 1. Using the nsUri as the systemID
* 2. Using the schemaLocation as the systemID
*
* 3. If that fails, the baseURI is not null, the xsd is located using
* URL(baseURL, schemaLocation)
*
* 4. If the baseURI is null, the xsd is located using URL(schemaLocation)
*
* @param nsUri
* @param localName
* @param baseURI
* @param schemaLocation
* @return
*/
public SchemaBinding resolve(String nsUri, String localName, String baseURI, String schemaLocation)
{
boolean trace = log.isTraceEnabled();
InputSource is = null;
// First try to resolve the namespace as a systemID
try
{
is = resolver.resolveEntity(null, nsUri);
}
catch (Exception e)
{
if( trace )
log.trace("Failed to use nsUri as systemID", e);
}
if( is == null && schemaLocation != null )
{
// Next try the schemaLocation as a systemID
try
{
is = resolver.resolveEntity(null, schemaLocation);
}
catch (Exception e)
{
if( trace )
log.trace("Failed to use schemaLocation as systemID", e);
}
if( is == null )
{
URL schemaURL = null;
// Just try resolving the schemaLocation against the baseURI
try
{
if(baseURI == null)
{
baseURI = this.baseURI;
}
if( baseURI != null )
{
URL baseURL = new URL(baseURI);
schemaURL = new URL(baseURL, schemaLocation);
}
else
{
schemaURL = new URL(schemaLocation);
}
if( schemaURL != null )
{
InputStream is2 = schemaURL.openStream();
is = new InputSource(is2);
}
}
catch(Exception e)
{
if( trace )
log.trace("Failed to use schemaLocation as URL", e);
}
}
}
SchemaBinding schema = null;
if( is != null )
{
schema = XsdBinder.bind(is.getByteStream(), null, baseURI);
}
return schema;
}
}