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Apache CXF example source code file (PersistenceUtils.java)

This example Apache CXF source code file (PersistenceUtils.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

io, jaxbcontext, jaxbelement, jaxbelement, jaxbexception, jaxbexception, loadingbytearrayoutputstream, marshaller, object, persistenceutils, persistenceutils, rmstoreexception, sequenceacknowledgement, sequenceacknowledgement, unmarshaller

The Apache CXF PersistenceUtils.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.rm.persistence;

import java.io.InputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import org.apache.cxf.common.util.PackageUtils;
import org.apache.cxf.helpers.LoadingByteArrayOutputStream;
import org.apache.cxf.ws.rm.SequenceAcknowledgement;

/**
 * 
 */
public final class PersistenceUtils {
    
    private static PersistenceUtils instance;
    private JAXBContext context;
    private Unmarshaller unmarshaller;
    private Marshaller marshaller;
    

    /**
     * Prevents instantiation.
     */
    private PersistenceUtils() {
    }
    
    public static PersistenceUtils getInstance() {
        if (null == instance) {
            instance = new PersistenceUtils();
        }
        return instance;
    }
    
    public SequenceAcknowledgement deserialiseAcknowledgment(InputStream is) {
        Object obj = null;
        try {
            obj = getUnmarshaller().unmarshal(is);
            if (obj instanceof JAXBElement<?>) {
                JAXBElement<?> el = (JAXBElement)obj;
                obj = el.getValue();
            }
        } catch (JAXBException ex) {
            throw new RMStoreException(ex);
        }
        return (SequenceAcknowledgement)obj;
    }
    
    public InputStream serialiseAcknowledgment(SequenceAcknowledgement ack) {
        LoadingByteArrayOutputStream bos = new LoadingByteArrayOutputStream(); 
        try {
            getMarshaller().marshal(ack, bos);
        } catch (JAXBException ex) {
            throw new RMStoreException(ex);
        }
        return bos.createInputStream();
    }
    
    private JAXBContext getContext() throws JAXBException {
        if (null == context) {
            context = JAXBContext.newInstance(PackageUtils
                .getPackageName(SequenceAcknowledgement.class), 
                getClass().getClassLoader()); 
        }
        return context;
    }
      
    private Unmarshaller getUnmarshaller() throws JAXBException {
        if (null == unmarshaller) {
            unmarshaller = getContext().createUnmarshaller();
        }
        return unmarshaller;
    }
    
    private Marshaller getMarshaller() throws JAXBException {
        if (null == marshaller) {
            marshaller = getContext().createMarshaller();
        }
        return marshaller;
    }
}

Other Apache CXF examples (source code examples)

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