Apache CXF example source code file (CorbaObjectReferenceEventProducer.java)

This example Apache CXF source code file (CorbaObjectReferenceEventProducer.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

arraylist, corba, corbainterfacenameeventproducer, corbametadataeventproducer, corbaservicenameeventproducer, corbatypeeventproducer, eprmetadata, eprmetadata, list, list, log, logging, qname, qname, string, string, util, xmleventfactory

The Apache CXF CorbaObjectReferenceEventProducer.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.binding.corba.types;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.wsdl.Binding;
import javax.wsdl.Definition;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventFactory;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Namespace;

import org.apache.cxf.binding.corba.utils.CorbaObjectReferenceHelper;
import org.apache.cxf.binding.corba.utils.CorbaUtils;
import org.apache.cxf.binding.corba.utils.EprMetaData;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.service.model.ServiceInfo;
import org.apache.cxf.wsdl11.WSDLServiceBuilder;
import org.omg.CORBA.ORB;

public final class CorbaObjectReferenceEventProducer extends AbstractStartEndEventProducer {

    static final String WSDLI_NAMESPACE_URI = "http://www.w3.org/2006/01/wsdl-instance";
    static final String XSI_NAMESPACE_URI = "http://www.w3.org/2001/XMLSchema-instance";
    static final QName WSA_ADDRESS = new QName(CorbaObjectReferenceHelper.ADDRESSING_NAMESPACE_URI,
                                               "Address");
    static final List<Attribute> IS_NIL_OBJ_REF_ATTRS;
    static {
        XMLEventFactory factory = XMLEventFactory.newInstance();
        IS_NIL_OBJ_REF_ATTRS = new ArrayList<Attribute>();
        IS_NIL_OBJ_REF_ATTRS.add(factory.createAttribute(new QName(XSI_NAMESPACE_URI, "nil", "xsi"), "true"));
    }
    private static final String INFER_FROM_TYPE_ID = "InferFromTypeId";
    private static final Logger LOG = LogUtils.getL7dLogger(CorbaObjectReferenceEventProducer.class);

    List<Attribute> refAttrs;    
       
    public CorbaObjectReferenceEventProducer(CorbaObjectHandler h, ServiceInfo service, ORB orbRef) {
        CorbaObjectReferenceHandler handler = (CorbaObjectReferenceHandler) h;
        name = CorbaUtils.processQName(handler.getName(), service);
        orb = orbRef;
        serviceInfo = service;
        refAttrs = null;

        if (handler.getReference() == null) {
            refAttrs = IS_NIL_OBJ_REF_ATTRS;
            return;
        }

        List<CorbaTypeEventProducer> objRefProducers = new ArrayList();
        
        String address = orb.object_to_string(handler.getReference());
        objRefProducers.add(new CorbaAddressEventProducer(address));

        Definition wsdlDef = (Definition)serviceInfo.getProperty(WSDLServiceBuilder.WSDL_DEFINITION);
        
        // Get the TypeImpl of the object reference so that we can determine the binding
        // needed for this object reference
        org.apache.cxf.binding.corba.wsdl.Object objType =
            (org.apache.cxf.binding.corba.wsdl.Object)handler.getType();
        QName bindingName = objType.getBinding();
        if (bindingName != null) {
            EprMetaData eprInfo = null;
            if (INFER_FROM_TYPE_ID.equalsIgnoreCase(bindingName.getLocalPart())) { 
                String typeId = CorbaObjectReferenceHelper.extractTypeIdFromIOR(address);
                if (!StringUtils.isEmpty(typeId)) {
                    eprInfo = getEprMetadataForTypeId(wsdlDef, typeId);
                } else {
                    LOG.log(Level.SEVERE, "For binding with value \"" + INFER_FROM_TYPE_ID
                                    + "\" the type_id of the object reference IOR must be set to its most"
                                    + " derived type. It is currently null indicating CORBA:Object."
                                    + " Address Url=" + address); 
                }
            } else {               
                eprInfo = getEprMetadataForBindingName(wsdlDef, bindingName);
            }
            
            if (eprInfo.isValid()) {
                LOG.log(Level.FINE, "Epr metadata " + eprInfo);
                // Create the meta data producer and add its child producers.
                String wsdlLoc = CorbaObjectReferenceHelper.getWSDLLocation(eprInfo.getCandidateWsdlDef());
                CorbaServiceNameEventProducer nameProducer =
                    new CorbaServiceNameEventProducer(eprInfo.getServiceQName(), eprInfo.getPortName());
                QName interfaceName = eprInfo.getBinding().getPortType().getQName();
                CorbaInterfaceNameEventProducer interfaceProducer =
                    new CorbaInterfaceNameEventProducer(interfaceName);
                CorbaMetaDataEventProducer metaProducer =
                    new CorbaMetaDataEventProducer(wsdlLoc, nameProducer, interfaceProducer);  
                objRefProducers.add(metaProducer);
            }
        }
        producers = objRefProducers.iterator();
    }
    
    private EprMetaData getEprMetadataForBindingName(Definition wsdlDef, QName bindingName) {
        EprMetaData info = getObjectReferenceBinding(wsdlDef, bindingName); 
        CorbaObjectReferenceHelper.populateEprInfo(info);
        return info;
    }

    private EprMetaData getEprMetadataForTypeId(Definition wsdlDef, String typeId) {        
        EprMetaData info = CorbaObjectReferenceHelper.getBindingForTypeId(typeId, wsdlDef);
        CorbaObjectReferenceHelper.populateEprInfo(info);
        return info;
    }

    public List<Attribute> getAttributes() {
        if (currentEventProducer != null) {
            return currentEventProducer.getAttributes();
        }
        return refAttrs;
    }
    
    protected EprMetaData getObjectReferenceBinding(Definition wsdlDef, QName bindingName) {
        EprMetaData info = new EprMetaData();
        Binding wsdlBinding = wsdlDef.getBinding(bindingName);
        
        // If the binding name does not have a namespace associated with it, then we'll need to 
        // get the list of all bindings and compare their local parts against our name.
        if (wsdlBinding == null && bindingName.getNamespaceURI().equals("")
            && !bindingName.getLocalPart().equals("")) {
            Map bindings = wsdlDef.getBindings();
            Collection bindingsCollection = bindings.values();
            for (Iterator i = bindingsCollection.iterator(); i.hasNext();) {
                Binding b = (Binding)i.next();
                if (b.getQName().getLocalPart().equals(bindingName.getLocalPart())) {
                    wsdlBinding = b;
                    break;
                }
            }
        }
        
        if (wsdlBinding != null) {
            info.setBinding(wsdlBinding);
            info.setCandidateWsdlDef(wsdlDef);
        }
        
        return info;
    }

    // An event producer to handle the production of the Address XML data.
    class CorbaAddressEventProducer implements CorbaTypeEventProducer {
        int state;

        int[] states = {XMLStreamReader.START_ELEMENT, 
                        XMLStreamReader.CHARACTERS, 
                        XMLStreamReader.END_ELEMENT};
        final String address;

        public CorbaAddressEventProducer(String value) {
            address = value;
        }

        public String getLocalName() {
            return WSA_ADDRESS.getLocalPart();
        }

        public String getText() {
            return address;
        }

        public int next() {
            return states[state++];
        }

        public QName getName() {
            return WSA_ADDRESS;
        }

        public boolean hasNext() {
            return state < states.length;
        }

        public List<Attribute> getAttributes() {
            return null;
        }

        public List<Namespace> getNamespaces() {
            return null;
        }
    }

    // An event producer to handle the production of the Metadata XML data.  This producer will rely
    // on two additional producers to handle the production of sub-events.
    class CorbaMetaDataEventProducer extends AbstractStartEndEventProducer {

        CorbaServiceNameEventProducer svcProducer;
        CorbaInterfaceNameEventProducer intfProducer;
        List<Attribute> metaAttrs;

        public CorbaMetaDataEventProducer(CorbaServiceNameEventProducer svc) {
            this(null, svc, null);
        }
        
        public CorbaMetaDataEventProducer(String location,
                                          CorbaServiceNameEventProducer svc,
                                          CorbaInterfaceNameEventProducer intf) {
            name = new QName(CorbaObjectReferenceHelper.ADDRESSING_NAMESPACE_URI, "Metadata");

            List<CorbaTypeEventProducer> metaDataProducers = new ArrayList();
            metaDataProducers.add(svc);

            if (intf != null) {
                metaDataProducers.add(intf);
            }

            producers = metaDataProducers.iterator();
            
            if (location != null) {
                XMLEventFactory factory = XMLEventFactory.newInstance();
                metaAttrs = new ArrayList<Attribute>();
                metaAttrs.add(factory.createAttribute(
                        new QName(WSDLI_NAMESPACE_URI, "wsdlLocation", "objrefns1"), location));
            }

        }

        public List<Attribute> getAttributes() {
            if (currentEventProducer != null) {
                return currentEventProducer.getAttributes();
            } else {
                return metaAttrs;
            }
        }
   
    }

    // An event producer to handle the production of the ServiceName XML data.
    class CorbaServiceNameEventProducer implements CorbaTypeEventProducer {
        int state;
        int[] states = {XMLStreamReader.START_ELEMENT,
                        XMLStreamReader.CHARACTERS,
                        XMLStreamReader.END_ELEMENT};
        QName serviceName;
        QName name;

        List<Attribute> attributes;
        List<Namespace> namespaces;

        public CorbaServiceNameEventProducer(QName svc, String ep) {
            serviceName = svc;

            name = new QName(CorbaObjectReferenceHelper.ADDRESSING_WSDL_NAMESPACE_URI,
                             "ServiceName");
            
            XMLEventFactory factory = XMLEventFactory.newInstance();

            attributes = new ArrayList<Attribute>();
            attributes.add(factory.createAttribute("EndpointName", ep));

            namespaces = new ArrayList<Namespace>();
            namespaces.add(factory.createNamespace("objrefns2", svc.getNamespaceURI()));
        }

        public String getLocalName() {
            return name.getLocalPart();
        }

        public String getText() {
            return namespaces.get(0).getPrefix() + ":" + serviceName.getLocalPart();
        }

        public int next() {
            return states[state++];
        }

        public boolean hasNext() {
            return state < states.length;
        }

        public QName getName() {
            return name;
        }

        public List<Attribute> getAttributes() {
            return attributes;
        }

        public List<Namespace> getNamespaces() {
            return namespaces;
        }
    }

    // An event producer to handle the production of the InterfaceName XML data.
    class CorbaInterfaceNameEventProducer implements CorbaTypeEventProducer {
        int state;
        int[] states = {XMLStreamReader.START_ELEMENT,
                        XMLStreamReader.CHARACTERS,
                        XMLStreamReader.END_ELEMENT};
        QName interfaceName;
        QName name;
        List<Namespace> namespaces;

        public CorbaInterfaceNameEventProducer(QName intf) {
            interfaceName = intf;

            name = new QName(CorbaObjectReferenceHelper.ADDRESSING_WSDL_NAMESPACE_URI,
                             "InterfaceName");
            
            XMLEventFactory factory = XMLEventFactory.newInstance();
            namespaces = new ArrayList<Namespace>();
            namespaces.add(factory.createNamespace("objrefns2", intf.getNamespaceURI()));
        }

        public String getLocalName() {
            return name.getLocalPart();
        }

        public String getText() {
            return namespaces.get(0).getPrefix() + ":" + interfaceName.getLocalPart();
        }

        public int next() {
            return states[state++];
        }

        public boolean hasNext() {
            return state < states.length;
        }

        public QName getName() {
            return name;
        }

        public List<Attribute> getAttributes() {
            return null;
        }

        public List<Namespace> getNamespaces() {
            return namespaces;
        }
    }
}