/**
* Copyright 2005-2011 Noelios Technologies.
*
* The contents of this file are subject to the terms of one of the following
* open source licenses: LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL 1.0 (the
* "Licenses"). You can select the license that you prefer but you may not use
* this file except in compliance with one of these Licenses.
*
* You can obtain a copy of the LGPL 3.0 license at
* http://www.opensource.org/licenses/lgpl-3.0.html
*
* You can obtain a copy of the LGPL 2.1 license at
* http://www.opensource.org/licenses/lgpl-2.1.php
*
* You can obtain a copy of the CDDL 1.0 license at
* http://www.opensource.org/licenses/cddl1.php
*
* You can obtain a copy of the EPL 1.0 license at
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the Licenses for the specific language governing permissions and
* limitations under the Licenses.
*
* Alternatively, you can obtain a royalty free commercial license with less
* limitations, transferable or non-transferable, directly at
* http://www.noelios.com/products/restlet-engine
*
* Restlet is a registered trademark of Noelios Technologies.
*/
package org.restlet.ext.xml.internal;
import java.io.IOException;
import java.util.logging.Level;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.stream.StreamSource;
import org.restlet.Context;
import org.restlet.Request;
import org.restlet.Response;
import org.restlet.data.Method;
import org.restlet.data.Reference;
/**
* URI resolver based on a Restlet Context instance.
*
* @author Jerome Louvel
*/
public class ContextResolver implements URIResolver {
/** The Restlet context. */
private final Context context;
/**
* Constructor.
*
* @param context
* The Restlet context.
*/
public ContextResolver(Context context) {
this.context = context;
}
/**
* Resolves a target reference into a Source document.
*
* @see javax.xml.transform.URIResolver#resolve(java.lang.String,
* java.lang.String)
*/
public Source resolve(String href, String base) throws TransformerException {
Source result = null;
if (this.context != null) {
Reference targetRef = null;
if ((base != null) && !base.equals("")) {
// Potentially a relative reference
Reference baseRef = new Reference(base);
targetRef = new Reference(baseRef, href);
} else {
// No base, assume "href" is an absolute URI
targetRef = new Reference(href);
}
String targetUri = targetRef.getTargetRef().toString();
Response response = this.context.getClientDispatcher().handle(
new Request(Method.GET, targetUri));
if (response.getStatus().isSuccess()
&& response.isEntityAvailable()) {
try {
result = new StreamSource(response.getEntity().getStream());
result.setSystemId(targetUri);
} catch (IOException e) {
this.context.getLogger().log(Level.WARNING,
"I/O error while getting the response stream", e);
}
}
}
return result;
}
}