/*
 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. 
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.xml.internal.ws.client;

import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Nullable;
import com.sun.xml.internal.ws.Closeable;
import com.sun.xml.internal.ws.api.BindingID;
import com.sun.xml.internal.ws.api.EndpointAddress;
import com.sun.xml.internal.ws.api.WSBinding;
import com.sun.xml.internal.ws.api.WSService;
import com.sun.xml.internal.ws.api.addressing.WSEndpointReference;
import com.sun.xml.internal.ws.api.client.ServiceInterceptor;
import com.sun.xml.internal.ws.api.client.ServiceInterceptorFactory;
import com.sun.xml.internal.ws.api.model.SEIModel;
import com.sun.xml.internal.ws.api.pipe.*;
import com.sun.xml.internal.ws.api.server.Container;
import com.sun.xml.internal.ws.api.server.ContainerResolver;
import com.sun.xml.internal.ws.api.wsdl.parser.WSDLParserExtension;
import com.sun.xml.internal.ws.binding.BindingImpl;
import com.sun.xml.internal.ws.binding.WebServiceFeatureList;
import com.sun.xml.internal.ws.client.HandlerConfigurator.AnnotationConfigurator;
import com.sun.xml.internal.ws.client.HandlerConfigurator.HandlerResolverImpl;
import com.sun.xml.internal.ws.client.sei.SEIStub;
import com.sun.xml.internal.ws.developer.WSBindingProvider;
import com.sun.xml.internal.ws.developer.UsesJAXBContextFeature;
import com.sun.xml.internal.ws.model.AbstractSEIModelImpl;
import com.sun.xml.internal.ws.model.RuntimeModeler;
import com.sun.xml.internal.ws.model.SOAPSEIModel;
import com.sun.xml.internal.ws.model.wsdl.WSDLModelImpl;
import com.sun.xml.internal.ws.model.wsdl.WSDLPortImpl;
import com.sun.xml.internal.ws.model.wsdl.WSDLServiceImpl;
import com.sun.xml.internal.ws.resources.ClientMessages;
import com.sun.xml.internal.ws.resources.DispatchMessages;
import com.sun.xml.internal.ws.resources.ProviderApiMessages;
import com.sun.xml.internal.ws.util.JAXWSUtils;
import com.sun.xml.internal.ws.util.ServiceConfigurationError;
import com.sun.xml.internal.ws.util.ServiceFinder;
import static com.sun.xml.internal.ws.util.xml.XmlUtil.createDefaultCatalogResolver;
import com.sun.xml.internal.ws.wsdl.parser.RuntimeWSDLParser;
import org.xml.sax.SAXException;

import javax.jws.HandlerChain;
import javax.jws.WebService;
import javax.xml.bind.JAXBContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.ws.*;
import javax.xml.ws.handler.HandlerResolver;
import javax.xml.ws.soap.AddressingFeature;
import java.io.IOException;
import java.lang.reflect.Proxy;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.*;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;

/**
 * <code>Service</code> objects provide the client view of a Web service.
 *
 * <p><code>Service</code> acts as a factory of the following:
 * <ul>
 * <li>Proxies for a target service endpoint.
 * <li>Instances of <code>javax.xml.ws.Dispatch</code> for
 * dynamic message-oriented invocation of a remote
 * operation.
 * </li>
 *
 * <p>The ports available on a service can be enumerated using the
 * <code>getPorts</code> method. Alternatively, you can pass a
 * service endpoint interface to the unary <code>getPort</code> method
 * and let the runtime select a compatible port.
 *
 * <p>Handler chains for all the objects created by a <code>Service</code>
 * can be set by means of the provided <code>HandlerRegistry</code>.
 *
 * <p>An <code>Executor</code> may be set on the service in order
 * to gain better control over the threads used to dispatch asynchronous
 * callbacks. For instance, thread pooling with certain parameters
 * can be enabled by creating a <code>ThreadPoolExecutor</code> and
 * registering it with the service.
 *
 * @author WS Development Team
 * @see Executor
 * @since JAX-WS 2.0
 */
public class WSServiceDelegate extends WSService {
    /**
     * All ports.
     * <p>
     * This includes ports statically known to WSDL, as well as
     * ones that are dynamically added
     * through {@link #addPort(QName, String, String)}.
     * <p>
     * For statically known ports we'll have {@link SEIPortInfo}.
     * For dynamically added ones we'll have {@link PortInfo}.
     */
    private final Map<QName, PortInfo> ports = new HashMap<QName, PortInfo>();

    /**
     * Whenever we create {@link BindingProvider}, we use this to configure handlers.
     */
    private @NotNull HandlerConfigurator handlerConfigurator = new HandlerResolverImpl(null);

    private final Class<? extends Service> serviceClass;

    /**
     * Name of the service for which this {@link WSServiceDelegate} is created for.
     */
    private final @NotNull QName serviceName;

    /**
     * Information about SEI, keyed by their interface type.
     */
   // private final Map<Class,SEIPortInfo> seiContext = new HashMap<Class,SEIPortInfo>();
   private final Map<QName,SEIPortInfo> seiContext = new HashMap<QName,SEIPortInfo>();
    private Executor executor;

    /**
     * The WSDL service that this {@link Service} object represents.
     * <p>
     * This field is null iff no WSDL is given to {@link Service}.
     * This fiels can be be null if the service is created without wsdl but later
     * the epr supplies a wsdl that can be parsed.
     */
    private  @Nullable WSDLServiceImpl wsdlService;

    private final Container container;
    /**
     * Multiple {@link ServiceInterceptor}s are aggregated into one.
     */
    /*package*/ final @NotNull ServiceInterceptor serviceInterceptor;


    public WSServiceDelegate(URL wsdlDocumentLocation, QName serviceName, Class<? extends Service> serviceClass) {
        this(
            wsdlDocumentLocation==null ? null : new StreamSource(wsdlDocumentLocation.toExternalForm()),
            serviceName,serviceClass);
    }

    /**
     * @param serviceClass
     *      Either {@link Service}.class or other generated service-derived classes.
     */
    public WSServiceDelegate(@Nullable Source wsdl, @NotNull QName serviceName, @NotNull final Class<? extends Service> serviceClass) {
        //we cant create a Service without serviceName
        if (serviceName == null)
            throw new WebServiceException(ClientMessages.INVALID_SERVICE_NAME_NULL(serviceName));

        InitParams initParams = INIT_PARAMS.get();
        INIT_PARAMS.set(null);  // mark it as consumed
        if(initParams==null)    initParams = EMPTY_PARAMS;

        this.serviceName = serviceName;
        this.serviceClass = serviceClass;
        Container tContainer = initParams.getContainer()!=null ? initParams.getContainer() : ContainerResolver.getInstance().getContainer();
        if (tContainer == Container.NONE) {
            tContainer = new ClientContainer();
        }
        this.container = tContainer;

        // load interceptor
        ServiceInterceptor interceptor = ServiceInterceptorFactory.load(this, Thread.currentThread().getContextClassLoader());
        ServiceInterceptor si = container.getSPI(ServiceInterceptor.class);
        if (si != null) {
            interceptor = ServiceInterceptor.aggregate(interceptor, si);
        }
        this.serviceInterceptor = interceptor;


        //if wsdl is null, try and get it from the WebServiceClient.wsdlLocation
        if(wsdl == null){
            if(serviceClass != Service.class){
                WebServiceClient wsClient = AccessController.doPrivileged(new PrivilegedAction<WebServiceClient>() {
                        public WebServiceClient run() {
                            return serviceClass.getAnnotation(WebServiceClient.class);
                        }
                    });
                String wsdlLocation = wsClient.wsdlLocation();
                wsdlLocation = JAXWSUtils.absolutize(JAXWSUtils.getFileOrURLName(wsdlLocation));
                wsdl = new StreamSource(wsdlLocation);
            }
        }
        WSDLServiceImpl service=null;
        if (wsdl != null) {
            try {
                URL url = wsdl.getSystemId()==null ? null : new URL(wsdl.getSystemId());
                WSDLModelImpl model = parseWSDL(url, wsdl);
                service = model.getService(this.serviceName);
                if (service == null)
                    throw new WebServiceException(
                        ClientMessages.INVALID_SERVICE_NAME(this.serviceName,
                            buildNameList(model.getServices().keySet())));
                // fill in statically known ports
                for (WSDLPortImpl port : service.getPorts())
                    ports.put(port.getName(), new PortInfo(this, port));
            } catch (MalformedURLException e) {
                throw new WebServiceException(ClientMessages.INVALID_WSDL_URL(wsdl.getSystemId()));
            }
        }
        this.wsdlService = service;

        if (serviceClass != Service.class) {
            //if @HandlerChain present, set HandlerResolver on service context
            HandlerChain handlerChain =
                    AccessController.doPrivileged(new PrivilegedAction<HandlerChain>() {
                        public HandlerChain run() {
                            return serviceClass.getAnnotation(HandlerChain.class);
                        }
                    });
            if (handlerChain != null)
                handlerConfigurator = new AnnotationConfigurator(this);
        }

    }

    /**
     * Parses the WSDL and builds {@link com.sun.xml.internal.ws.api.model.wsdl.WSDLModel}.
     * @param wsdlDocumentLocation
     *      Either this or <tt>wsdl</tt> parameter must be given.
     *      Null location means the system won't be able to resolve relative references in the WSDL,
     */
    private WSDLModelImpl parseWSDL(URL wsdlDocumentLocation, Source wsdlSource) {
        try {
            return RuntimeWSDLParser.parse(wsdlDocumentLocation, wsdlSource, createDefaultCatalogResolver(),
                true, getContainer(), ServiceFinder.find(WSDLParserExtension.class).toArray());
        } catch (IOException e) {
            throw new WebServiceException(e);
        } catch (XMLStreamException e) {
            throw new WebServiceException(e);
        } catch (SAXException e) {
            throw new WebServiceException(e);
        } catch (ServiceConfigurationError e) {
            throw new WebServiceException(e);
        }
    }




    public Executor getExecutor() {
        if (executor != null) {
            return executor;
        } else
            executor = Executors.newCachedThreadPool(new DaemonThreadFactory());
        return executor;
    }

    public void setExecutor(Executor executor) {
        this.executor = executor;
    }

    public HandlerResolver getHandlerResolver() {
        return handlerConfigurator.getResolver();
    }

    /*package*/ final HandlerConfigurator getHandlerConfigurator() {
        return handlerConfigurator;
    }

    public void setHandlerResolver(HandlerResolver resolver) {
        handlerConfigurator = new HandlerResolverImpl(resolver);
    }

    public <T> T getPort(QName portName, Class<T> portInterface) throws WebServiceException {
        return getPort(portName, portInterface, EMPTY_FEATURES);
    }

    public <T> T getPort(QName portName, Class<T> portInterface, WebServiceFeature... features) {
        if (portName == null || portInterface == null)
            throw new IllegalArgumentException();
        WSDLServiceImpl tWsdlService = this.wsdlService;
        if (tWsdlService == null) {
            // assigning it to local variable and not setting it back to this.wsdlService intentionally
            // as we don't want to include the service instance with information gathered from sei
            tWsdlService = getWSDLModelfromSEI(portInterface);
            //still null? throw error need wsdl metadata to create a proxy
            if (tWsdlService == null) {
                throw new WebServiceException(ProviderApiMessages.NO_WSDL_NO_PORT(portInterface.getName()));
            }

        }
        WSDLPortImpl portModel = getPortModel(tWsdlService, portName);
        return getPort(portModel.getEPR(), portName, portInterface, features);
    }

    public <T> T getPort(EndpointReference epr, Class<T> portInterface, WebServiceFeature... features) {
        return getPort(WSEndpointReference.create(epr),portInterface,features);
    }

    public <T> T getPort(WSEndpointReference wsepr, Class<T> portInterface, WebServiceFeature... features) {
        //get the portType from SEI, so that it can be used if EPR does n't have endpointName
        QName portTypeName = RuntimeModeler.getPortTypeName(portInterface);
        //if port name is not specified in EPR, it will use portTypeName to get it from the WSDL model.
        QName portName = getPortNameFromEPR(wsepr, portTypeName);
        return getPort(wsepr,portName,portInterface,features);
    }

    private <T> T getPort(WSEndpointReference wsepr, QName portName, Class<T> portInterface,
                          WebServiceFeature... features) {
        SEIPortInfo spi = addSEI(portName, portInterface, features);
        return createEndpointIFBaseProxy(wsepr,portName,portInterface,features, spi);
    }
    public <T> T getPort(Class<T> portInterface, WebServiceFeature... features) {
        //get the portType from SEI
        QName portTypeName = RuntimeModeler.getPortTypeName(portInterface);
        WSDLServiceImpl wsdlService = this.wsdlService;
        if(wsdlService == null) {
            // assigning it to local variable and not setting it back to this.wsdlService intentionally
            // as we don't want to include the service instance with information gathered from sei
            wsdlService = getWSDLModelfromSEI(portInterface);
            //still null? throw error need wsdl metadata to create a proxy
            if(wsdlService == null) {
                throw new WebServiceException(ProviderApiMessages.NO_WSDL_NO_PORT(portInterface.getName()));
            }
        }
        //get the first port corresponding to the SEI
        WSDLPortImpl port = wsdlService.getMatchingPort(portTypeName);
        if (port == null)
                throw new WebServiceException(ClientMessages.UNDEFINED_PORT_TYPE(portTypeName));
        QName portName = port.getName();
        return getPort(portName, portInterface,features);
    }

    public <T> T getPort(Class<T> portInterface) throws WebServiceException {
        return getPort(portInterface, EMPTY_FEATURES);
    }

    public void addPort(QName portName, String bindingId, String endpointAddress) throws WebServiceException {
        if (!ports.containsKey(portName)) {
            BindingID bid = (bindingId == null) ? BindingID.SOAP11_HTTP : BindingID.parse(bindingId);
            ports.put(portName,
                    new PortInfo(this, (endpointAddress == null) ? null :
                            EndpointAddress.create(endpointAddress), portName, bid));
        } else
            throw new WebServiceException(DispatchMessages.DUPLICATE_PORT(portName.toString()));
    }


    public <T> Dispatch<T> createDispatch(QName portName, Class<T>  aClass, Service.Mode mode) throws WebServiceException {
        return createDispatch(portName, aClass, mode, EMPTY_FEATURES);
    }

    @Override
    public <T> Dispatch<T> createDispatch(QName portName, WSEndpointReference wsepr, Class<T> aClass, Service.Mode mode, WebServiceFeature... features) {
        PortInfo port = safeGetPort(portName);
        BindingImpl binding = port.createBinding(features,null);
        Dispatch<T> dispatch = Stubs.createDispatch(portName, this, binding, aClass, mode, createPipeline(port, binding), wsepr);
        serviceInterceptor.postCreateDispatch((WSBindingProvider) dispatch);
        return dispatch;
    }

    public <T> Dispatch<T> createDispatch(QName portName, Class<T> aClass, Service.Mode mode, WebServiceFeature... features) {
        WebServiceFeatureList featureList =  new WebServiceFeatureList(features);
        WSEndpointReference wsepr = null;
        if(featureList.isEnabled(AddressingFeature.class) && wsdlService != null && wsdlService.get(portName) != null) {
            wsepr = wsdlService.get(portName).getEPR();
        }
        return createDispatch(portName, wsepr, aClass, mode, features);
    }

    public <T> Dispatch<T> createDispatch(EndpointReference endpointReference, Class<T> type, Service.Mode mode, WebServiceFeature... features) {
        WSEndpointReference wsepr = new WSEndpointReference(endpointReference);
        QName portName = addPortEpr(wsepr);
        return createDispatch(portName, wsepr, type, mode, features);
    }

    /**
     * Obtains {@link PortInfo} for the given name, with error check.
     */
    public
    @NotNull
    PortInfo safeGetPort(QName portName) {
        PortInfo port = ports.get(portName);
        if (port == null) {
            throw new WebServiceException(ClientMessages.INVALID_PORT_NAME(portName, buildNameList(ports.keySet())));
        }
        return port;
    }

    private StringBuilder buildNameList(Collection<QName> names) {
        StringBuilder sb = new StringBuilder();
        for (QName qn : names) {
            if (sb.length() > 0) sb.append(',');
            sb.append(qn);
        }
        return sb;
    }

    /**
     * Creates a new pipeline for the given port name.
     */
    private Tube createPipeline(PortInfo portInfo, WSBinding binding) {
        //Check all required WSDL extensions are understood
        checkAllWSDLExtensionsUnderstood(portInfo,binding);
        SEIModel seiModel = null;
        if(portInfo instanceof SEIPortInfo) {
            seiModel = ((SEIPortInfo)portInfo).model;
        }
        BindingID bindingId = portInfo.bindingId;

        TubelineAssembler assembler = TubelineAssemblerFactory.create(
                Thread.currentThread().getContextClassLoader(), bindingId);
        if (assembler == null)
            throw new WebServiceException("Unable to process bindingID=" + bindingId);    // TODO: i18n
        return assembler.createClient(
                new ClientTubeAssemblerContext(
                        portInfo.targetEndpoint,
                        portInfo.portModel,
                        this, binding, container,((BindingImpl)binding).createCodec(),seiModel));
    }

    /**
     * Checks only if RespectBindingFeature is enabled
     * checks if all required wsdl extensions in the
     * corresponding wsdl:Port are understood when RespectBindingFeature is enabled.
     * @throws WebServiceException
     *      when any wsdl extension that has wsdl:required=true is not understood
     */
    private void checkAllWSDLExtensionsUnderstood(PortInfo port, WSBinding binding) {
        if (port.portModel != null && binding.isFeatureEnabled(RespectBindingFeature.class)) {
            ((WSDLPortImpl) port.portModel).areRequiredExtensionsUnderstood();
        }
    }

    public EndpointAddress getEndpointAddress(QName qName) {
        return ports.get(qName).targetEndpoint;
    }

    public Dispatch<Object> createDispatch(QName portName, JAXBContext jaxbContext, Service.Mode mode) throws WebServiceException {
        return createDispatch(portName, jaxbContext, mode, EMPTY_FEATURES);
    }

    @Override
    public Dispatch<Object> createDispatch(QName portName, WSEndpointReference wsepr, JAXBContext jaxbContext, Service.Mode mode, WebServiceFeature... features) {
        PortInfo port = safeGetPort(portName);
        BindingImpl binding = port.createBinding(features,null);
        Dispatch<Object> dispatch = Stubs.createJAXBDispatch(
                portName, this, binding, jaxbContext, mode,
                createPipeline(port, binding), wsepr);
         serviceInterceptor.postCreateDispatch((WSBindingProvider)dispatch);
         return dispatch;
    }

    @Override
    public @NotNull Container getContainer() {
        return container;
    }

    public Dispatch<Object> createDispatch(QName portName, JAXBContext jaxbContext, Service.Mode mode, WebServiceFeature... webServiceFeatures) {
        WebServiceFeatureList featureList =  new WebServiceFeatureList(webServiceFeatures);
        WSEndpointReference wsepr = null;
        if(featureList.isEnabled(AddressingFeature.class) && wsdlService != null && wsdlService.get(portName) != null) {
            wsepr = wsdlService.get(portName).getEPR();
        }
        return createDispatch(portName, wsepr, jaxbContext, mode, webServiceFeatures);
    }

    public Dispatch<Object> createDispatch(EndpointReference endpointReference, JAXBContext context, Service.Mode mode, WebServiceFeature... features) {
        WSEndpointReference wsepr = new WSEndpointReference(endpointReference);
        QName portName = addPortEpr(wsepr);
        return createDispatch(portName, wsepr, context, mode, features);
    }

    private QName addPortEpr(WSEndpointReference wsepr) {
        if (wsepr == null)
            throw new WebServiceException(ProviderApiMessages.NULL_EPR());
        QName eprPortName = getPortNameFromEPR(wsepr, null);
        //add Port, if it does n't exist;
        // TODO: what if it has different epr address?
        {
            PortInfo portInfo = new PortInfo(this, (wsepr.getAddress() == null) ? null : EndpointAddress.create(wsepr.getAddress()), eprPortName,
                    getPortModel(wsdlService, eprPortName).getBinding().getBindingId());
            if (!ports.containsKey(eprPortName)) {
                ports.put(eprPortName, portInfo);
            }
        }
        return eprPortName;
    }

    /**
     *
     * @param wsepr EndpointReference from which portName will be extracted.
     *      If EndpointName ( port name) is null in EPR, then it will try to get if from WSDLModel using portType QName
     * @param portTypeName
     *          should be null in dispatch case
     *          should be non null in SEI case
     * @return
     *      port name from EPR after validating various metadat elements.
     *      Also if service instance does n't have wsdl,
     *      then it gets the WSDL metadata from EPR and builds wsdl model.
     */
    private QName getPortNameFromEPR(@NotNull WSEndpointReference wsepr, @Nullable QName portTypeName) {
        QName portName;
        WSEndpointReference.Metadata metadata = wsepr.getMetaData();
        QName eprServiceName = metadata.getServiceName();
        QName eprPortName = metadata.getPortName();
        if ((eprServiceName != null ) && !eprServiceName.equals(serviceName)) {
            throw new WebServiceException("EndpointReference WSDL ServiceName differs from Service Instance WSDL Service QName.\n"
                    + " The two Service QNames must match");
        }
        if (wsdlService == null) {
            Source eprWsdlSource = metadata.getWsdlSource();
            if (eprWsdlSource == null) {
                throw new WebServiceException(ProviderApiMessages.NULL_WSDL());
            }
            try {
                WSDLModelImpl eprWsdlMdl = parseWSDL(new URL(wsepr.getAddress()), eprWsdlSource);
                wsdlService = eprWsdlMdl.getService(serviceName);
                if (wsdlService == null)
                    throw new WebServiceException(ClientMessages.INVALID_SERVICE_NAME(serviceName,
                            buildNameList(eprWsdlMdl.getServices().keySet())));
            } catch (MalformedURLException e) {
                throw new WebServiceException(ClientMessages.INVALID_ADDRESS(wsepr.getAddress()));
            }
        }
        portName = eprPortName;

        if (portName == null && portTypeName != null) {
            //get the first port corresponding to the SEI
            WSDLPortImpl port = wsdlService.getMatchingPort(portTypeName);
            if (port == null)
                throw new WebServiceException(ClientMessages.UNDEFINED_PORT_TYPE(portTypeName));
            portName = port.getName();
        }
        if (portName == null)
            throw new WebServiceException(ProviderApiMessages.NULL_PORTNAME());
        if (wsdlService.get(portName) == null)
            throw new WebServiceException(ClientMessages.INVALID_EPR_PORT_NAME(portName, buildWsdlPortNames()));

        return portName;

    }

    private WSDLServiceImpl getWSDLModelfromSEI(final Class sei) {
        WebService ws = AccessController.doPrivileged(new PrivilegedAction<WebService>() {
            public WebService run() {
                return (WebService) sei.getAnnotation(WebService.class);
            }
        });
        if (ws == null || ws.wsdlLocation().equals(""))
            return null;
        String wsdlLocation = ws.wsdlLocation();
        wsdlLocation = JAXWSUtils.absolutize(JAXWSUtils.getFileOrURLName(wsdlLocation));
        Source wsdl = new StreamSource(wsdlLocation);
        WSDLServiceImpl service = null;

        try {
            URL url = wsdl.getSystemId() == null ? null : new URL(wsdl.getSystemId());
            WSDLModelImpl model = parseWSDL(url, wsdl);
            service = model.getService(this.serviceName);
            if (service == null)
                throw new WebServiceException(
                        ClientMessages.INVALID_SERVICE_NAME(this.serviceName,
                                buildNameList(model.getServices().keySet())));
        } catch (MalformedURLException e) {
            throw new WebServiceException(ClientMessages.INVALID_WSDL_URL(wsdl.getSystemId()));
        }
        return service;
    }

    public QName getServiceName() {
        return serviceName;
    }

    protected Class getServiceClass() {
        return serviceClass;
    }

    public Iterator<QName> getPorts() throws WebServiceException {
        // KK: the spec seems to be ambigous about whether
        // this returns ports that are dynamically added or not.
        if (ports.isEmpty())
            throw new WebServiceException("dii.service.no.wsdl.available");
        return ports.keySet().iterator();
    }

    public URL getWSDLDocumentLocation() {
        if(wsdlService==null)   return null;
        try {
            return new URL(wsdlService.getParent().getLocation().getSystemId());
        } catch (MalformedURLException e) {
            throw new AssertionError(e); // impossible
        }
    }

    private <T> T createEndpointIFBaseProxy(@Nullable WSEndpointReference epr,QName portName, Class<T> portInterface,
                                            WebServiceFeature[] webServiceFeatures, SEIPortInfo eif) {
        //fail if service doesnt have WSDL
        if (wsdlService == null)
            throw new WebServiceException(ClientMessages.INVALID_SERVICE_NO_WSDL(serviceName));

        if (wsdlService.get(portName)==null) {
            throw new WebServiceException(
                ClientMessages.INVALID_PORT_NAME(portName,buildWsdlPortNames()));
        }

        BindingImpl binding = eif.createBinding(webServiceFeatures,portInterface);
        SEIStub pis = new SEIStub(this, binding, eif.model, createPipeline(eif, binding), epr);

        T proxy = portInterface.cast(Proxy.newProxyInstance(portInterface.getClassLoader(),
                new Class[]{portInterface, WSBindingProvider.class, Closeable.class}, pis));
        if (serviceInterceptor != null) {
            serviceInterceptor.postCreateProxy((WSBindingProvider)proxy, portInterface);
        }
        return proxy;
    }

    /**
     * Lists up the port names in WSDL. For error diagnostics.
     */
    private StringBuilder buildWsdlPortNames() {
        Set<QName> wsdlPortNames = new HashSet<QName>();
        for (WSDLPortImpl port : wsdlService.getPorts())
            wsdlPortNames.add(port.getName());
        return buildNameList(wsdlPortNames);
    }

    /**
     * Obtains a {@link WSDLPortImpl} with error check.
     *
     * @return guaranteed to be non-null.
     */
    private @NotNull WSDLPortImpl getPortModel(WSDLServiceImpl wsdlService, QName portName) {
        WSDLPortImpl port = wsdlService.get(portName);
        if (port == null)
            throw new WebServiceException(
                    ClientMessages.INVALID_PORT_NAME(portName, buildWsdlPortNames()));
        return port;
    }

    /**
     * Contributes to the construction of {@link WSServiceDelegate} by filling in
     * {@link SEIPortInfo} about a given SEI (linked from the {@link Service}-derived class.)
     */
    //todo: valid port in wsdl
    private SEIPortInfo addSEI(QName portName, Class portInterface, WebServiceFeature... features) throws WebServiceException {
        boolean ownModel = useOwnSEIModel(features);
        if (ownModel) {
            // Create a new model and do not cache it
            return createSEIPortInfo(portName, portInterface, features);
        }

        SEIPortInfo spi = seiContext.get(portName);
        if (spi == null) {
            spi = createSEIPortInfo(portName, portInterface, features);
            seiContext.put(spi.portName, spi);
            ports.put(spi.portName, spi);
        }
        return spi;
    }

    private SEIPortInfo createSEIPortInfo(QName portName, Class portInterface, WebServiceFeature... features) {
        WSDLPortImpl wsdlPort = getPortModel(wsdlService, portName);
        RuntimeModeler modeler = new RuntimeModeler(portInterface, serviceName, wsdlPort, features);
        modeler.setClassLoader(portInterface.getClassLoader());
        modeler.setPortName(portName);
        AbstractSEIModelImpl model = modeler.buildRuntimeModel();
        return new SEIPortInfo(this, portInterface, (SOAPSEIModel) model, wsdlPort);
    }

    private boolean useOwnSEIModel(WebServiceFeature... features) {
        return WebServiceFeatureList.getFeature(features, UsesJAXBContextFeature.class) != null;
    }

    public WSDLServiceImpl getWsdlService() {
        return wsdlService;
    }

     class DaemonThreadFactory implements ThreadFactory {
        public Thread newThread(Runnable r) {
            Thread daemonThread = new Thread(r);
            daemonThread.setDaemon(Boolean.TRUE);
            return daemonThread;
        }
    }

    private static final WebServiceFeature[] EMPTY_FEATURES = new WebServiceFeature[0];
}