alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Apache CXF example source code file (JaxbAssertionBuilder.java)

This example Apache CXF source code file (JaxbAssertionBuilder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

classnotfoundexception, collection, dom, jaxbassertion, jaxbassertion, jaxbassertionbuilder, jaxbassertionbuilder, jaxbelement, jaxbelement, jaxbexception, jaxbexception, log, logging, policyassertion, qname, suppresswarnings, unmarshaller, util

The Apache CXF JaxbAssertionBuilder.java source code

/**
 * 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.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.common.util.PackageUtils;
import org.apache.cxf.jaxb.JAXBUtils;
import org.apache.cxf.ws.policy.AssertionBuilder;
import org.apache.cxf.ws.policy.PolicyAssertion;
import org.apache.neethi.Constants;

public class JaxbAssertionBuilder<T> implements AssertionBuilder {

    private static final Logger LOG = LogUtils.getL7dLogger(JaxbAssertionBuilder.class);
    private Unmarshaller unmarshaller;
    private Collection<QName> supportedTypes;
    private Class<T> type;
    
    /**
     * 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);
    }
       
    protected Unmarshaller getUnmarshaller() {
        if (unmarshaller == null) {
            try {
                createUnmarhsaller();
            } catch (JAXBException e) {
                throw new RuntimeException(e);
            }
        }
        
        return unmarshaller;
    }
    
    protected synchronized void createUnmarhsaller()  throws JAXBException {
        if (unmarshaller != null) {
            return;
        }
        
        JAXBContext context = JAXBContext.newInstance(PackageUtils.getPackageName(type), 
                                                      type.getClassLoader());
        unmarshaller = context.createUnmarshaller();
    }
    
    public PolicyAssertion build(Element element) {
        QName name = new QName(element.getNamespaceURI(), element.getLocalName());
        JaxbAssertion<T> assertion = buildAssertion();
        assertion.setName(name);
        assertion.setOptional(getOptionality(element));
        assertion.setData(getData(element));
        return assertion;
    }
    
    public Collection<QName> getKnownElements() {
        return supportedTypes;
    }

    @SuppressWarnings("unchecked")
    public PolicyAssertion buildCompatible(PolicyAssertion a, PolicyAssertion b) {
        if (a.equal(b)) {
            JaxbAssertion<T> ja = (JaxbAssertion)a;
            JaxbAssertion<T> compatible = buildAssertion();
            compatible.setName(a.getName());
            compatible.setOptional(a.isOptional() && b.isOptional());
            compatible.setData(ja.getData());
            return compatible;
        }
        return null;
    }
    
    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;
    }
    
    

}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF JaxbAssertionBuilder.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.