/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. The ASF licenses this file to You
* under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.parser.stax.util;
import java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import org.apache.abdera.i18n.iri.IRI;
import org.apache.abdera.model.Document;
import org.apache.abdera.model.Element;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMContainer;
import org.apache.axiom.om.OMNode;
import org.jaxen.Context;
import org.jaxen.Function;
import org.jaxen.FunctionCallException;
import org.jaxen.Navigator;
import org.jaxen.function.StringFunction;
public class ResolveFunction implements Function {
public static final QName QNAME = new QName("http://abdera.apache.org", "resolve");
@SuppressWarnings("unchecked")
public Object call(Context context, List args) throws FunctionCallException {
List<String> results = new ArrayList<String>();
if (args.isEmpty())
return null;
Navigator navigator = context.getNavigator();
for (Object obj : args) {
if (obj instanceof List) {
for (Object o : (List)obj) {
try {
String value = StringFunction.evaluate(o, navigator);
IRI resolved = null;
IRI baseUri = null;
if (o instanceof OMNode) {
OMNode node = (OMNode)o;
OMContainer el = node.getParent();
if (el instanceof Document) {
Document<Element> doc = (Document<Element>)el;
baseUri = doc.getBaseUri();
} else if (el instanceof Element) {
Element element = (Element)el;
baseUri = element.getBaseUri();
}
} else if (o instanceof OMAttribute) {
OMAttribute attr = (OMAttribute)o;
Element element = (Element)context.getNavigator().getParentNode(attr);
baseUri = element.getBaseUri();
}
if (baseUri != null) {
resolved = baseUri.resolve(value);
results.add(resolved.toString());
}
} catch (Exception e) {
}
}
} else {
// nothing to do
}
}
if (results.size() == 1) {
return results.get(0);
} else if (results.size() > 1) {
return results;
} else
return null;
}
}