/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. 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.
*/
package org.apache.cxf.ws.policy.builder.jaxb;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.namespace.QName;
import org.w3c.dom.Element;
import org.apache.cxf.common.classloader.ClassLoaderUtils;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.jaxb.JAXBContextCache;
import org.apache.cxf.jaxb.JAXBContextCache.CachedContextAndSchemas;
import org.apache.cxf.jaxb.JAXBUtils;
import org.apache.neethi.Assertion;
import org.apache.neethi.AssertionBuilderFactory;
import org.apache.neethi.Constants;
import org.apache.neethi.builders.AssertionBuilder;
import org.apache.neethi.builders.xml.XMLPrimitiveAssertionBuilder;
public class JaxbAssertionBuilder<T> implements AssertionBuilder<Element> {
private static final Logger LOG = LogUtils.getL7dLogger(JaxbAssertionBuilder.class);
private Collection<QName> supportedTypes;
private Class<T> type;
private JAXBContext context;
private Set<Class<?>> classes;
/**
* Constructs a JAXBAssertionBuilder from the QName of the schema type
* @param qn the schema type
* @throws JAXBException
* @throws ClassNotFoundException
*/
public JaxbAssertionBuilder(QName qn) throws JAXBException, ClassNotFoundException {
this(JAXBUtils.namespaceURIToPackage(qn.getNamespaceURI())
+ "." + JAXBUtils.nameToIdentifier(qn.getLocalPart(), JAXBUtils.IdentifierType.CLASS), qn);
}
/**
* Constructs a JAXBAssertionBuilder from the specified class name and schema type.
* @param className the name of the class to which the schema type is mapped
* @param qn the schema type
* @throws JAXBException
* @throws ClassNotFoundException
*/
@SuppressWarnings("unchecked")
public JaxbAssertionBuilder(String className, QName qn) throws JAXBException, ClassNotFoundException {
this((Class<T>)ClassLoaderUtils.loadClass(className, JaxbAssertionBuilder.class), qn);
}
/**
* Constructs a JAXBAssertionBuilder from the specified class and schema type.
* @param type the class to which the schema type is mapped
* @param qn the schema type
* @throws JAXBException
* @throws ClassNotFoundException
*/
public JaxbAssertionBuilder(Class<T> type, QName qn) throws JAXBException {
this.type = type;
supportedTypes = Collections.singletonList(qn);
}
private synchronized JAXBContext getContext() throws JAXBException {
if (context == null || classes == null) {
CachedContextAndSchemas ccs
= JAXBContextCache.getCachedContextAndSchemas(type);
classes = ccs.getClasses();
context = ccs.getContext();
}
return context;
}
protected Unmarshaller getUnmarshaller() {
try {
return getContext().createUnmarshaller();
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
public Assertion build(Element element, AssertionBuilderFactory factory) {
QName name = new QName(element.getNamespaceURI(), element.getLocalName());
JaxbAssertion<T> assertion = buildAssertion();
assertion.setName(name);
assertion.setOptional(XMLPrimitiveAssertionBuilder.isOptional(element));
assertion.setIgnorable(XMLPrimitiveAssertionBuilder.isIgnorable(element));
assertion.setData(getData(element));
return assertion;
}
public QName[] getKnownElements() {
return supportedTypes.toArray(new QName[supportedTypes.size()]);
}
protected JaxbAssertion<T> buildAssertion() {
return new JaxbAssertion<T>();
}
protected boolean getOptionality(Element element) {
boolean optional = false;
String value = element.getAttributeNS(
Constants.Q_ELEM_OPTIONAL_ATTR.getNamespaceURI(),
Constants.Q_ELEM_OPTIONAL_ATTR.getLocalPart());
if (Boolean.valueOf(value)) {
optional = true;
}
return optional;
}
@SuppressWarnings("unchecked")
protected T getData(Element element) {
Object obj = null;
try {
obj = getUnmarshaller().unmarshal(element);
} catch (JAXBException ex) {
LogUtils.log(LOG, Level.SEVERE, "UNMARSHAL_ELEMENT_EXC", ex);
}
if (obj instanceof JAXBElement<?>) {
JAXBElement<?> el = (JAXBElement<?>)obj;
obj = el.getValue();
}
if (null != obj && LOG.isLoggable(Level.FINE)) {
LOG.fine("Unmarshaled element into object of type: " + obj.getClass().getName()
+ " value: " + obj);
}
return (T)obj;
}
}
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