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 /**

  * <h1>JAX-WS 2.0.1 Server Runtime</h1>

  * <P>This document describes the architecture of server side

  * JAX-WS 2.0.1 runtime. </p>

  *

  * <h3>JAX-WS 2.0.1 Server Runtime Sequence Diagram</h3>

   * <img src='../../../../../jaxws/basic-server.seq.png'>

  *

  *

  * <H3>Message Flow</H3>

  * <P>A Web Service invocation starts with either the

  * {@link com.sun.xml.internal.ws.transport.http.servlet.WSServletDelegate WSServletDelegate}

  * or the {@link com.sun.xml.internal.ws.transport.http.server.ServerConnectionImpl ServerConnectionImpl}.

  * Both of these classes find the appropriate {@link com.sun.xml.internal.ws.server.RuntimeEndpointInfo RuntimeEndpointInfo}

  * and invokes the {@link com.sun.xml.internal.ws.server.Tie#handle(com.sun.xml.internal.ws.api.server.WSConnection,

  * com.sun.xml.internal.ws.spi.runtime.RuntimeEndpointInfo) Tie.handle}

  * method. This method first creates a {@link com.sun.pept.ept.MessageInfo MessageInfo}

  * used to gather inforrmation about the message to be received. A

  * {@link com.sun.xml.internal.ws.server.RuntimeContext RuntimeContext}

  * is then created with the MessageInfo and the {@link com.sun.xml.internal.ws.api.model.SEIModel RuntimeModel}

  * retrieved from the RuntimeEndpointInfo. The RuntimeContext is then

  * stored in the MessageInfo. The {@link com.sun.pept.ept.EPTFactory EPTFactory}

  * is retrieved from the {@link com.sun.xml.internal.ws.server.EPTFactoryFactoryBase EPTFactoryFactoryBase}

  * and also placed in the MessagInfo. A {@link com.sun.pept.protocol.MessageDispatcher MessageDispatcher}

  * is then created and the receive method is invoked. There will be two

  * types of MessageDispatchers for JAX-WS 2.0.1, SOAPMessageDispatcher

  * (one for client and one for the server) and an XMLMessageDispatcher

  * (one for the client and one for the server).</P>

  * <P>The MessageDispatcher.receive method orchestrates the receiving of

  * a Message. The SOAPMessageDispatcher first converts the MessageInfo

  * to a SOAPMessage. The SOAPMessageDispatcher then does mustUnderstand

  * processing followed by an invocation of any handlers. The SOAPMessage

  * is then converted to an InternalMessage and stored in the

  * MessageInfo. The converting of the SOAPMessage to an InternalMessage

  * is done using the decoder retrieved from the EPTFactory that is

  * contained in the MessageInfo. Once the SOAPMessage has been converted

  * to an InternalMessage the endpoint implementation is invoked via

  * reflection from the Method stored in the MessageInfo. The return

  * value of the method call is then stored in the InternalMessage. An

  * internalMessage is then created from the MessageInfo. The SOAPEncoder

  * is retrieved from the EPTFactory stored in the MessageInfo. The

  * SOAPEncoder.toSOAPMessage is then invoked to create a SOAPMessage

  * from the InternalMessage. A WSConnection is then retrieved from the

  * MessageInfo and the SOAPMessage is returned over that WSConnection.</P>

  * <P><BR>

  * </P>

  * <H3>External Interactions</H3>

  * <H4>SAAJ API</H4>

  * <UL>

  *      <LI><P>JAX-WS creates SAAJ javax.xml.soap.SOAPMessage

  *      from the HttpServletRequest.

  *      At present, JAX-WS reads all the bytes from the request stream and

  *      then creates SOAPMessage along with the HTTP headers.</P>

  * </UL>

  * <P>javax.xml.soap.MessageFactory(binding).createMessage(MimeHeaders, InputStream)</P>

  * <UL>

  *      <LI><P>SOAPMessage parses the content from the stream including MIME

  *      data</P>

  *      <LI><P>com.sun.xml.internal.ws.server.SOAPMessageDispatcher::checkHeadersPeekBody()</P>

  *      <P>SOAPMessage.getSOAPHeader() is used for mustUnderstand processing

  *      of headers. It further uses

  *      javax.xml.soap.SOAPHeader.examineMustUnderstandHeaderElements(role)</P>

  *      <P>SOAPMessage.getSOAPBody().getFistChild() is used for guessing the

  *      MEP of the request</P>

  *      <LI><P>com.sun.xml.internal.ws.handler.HandlerChainCaller:insertFaultMessage()</P>

  *      <P>SOAPMessage.getSOAPPart().getEnvelope() and some other SAAJ calls

  *      are made to create a fault in the SOAPMessage</P>

  *      <LI><P>com.sun.xml.internal.ws.handler.LogicalMessageImpl::getPayload()

  *      interacts with SAAJ to get body from SOAPMessage</P>

  *      <LI><P>com.sun.xml.internal.ws.encoding.soap.SOAPEncoder.toSOAPMessage(com.sun.xml.internal.ws.encoding.soap.internal.InternalMessage,

  *      SOAPMessage). There is a scenario where there is SOAPMessage and a

  *      logical handler sets payload as Source. To write to the stream,

  *      SOAPMessage.writeTo() is used but before that the body needs to be

  *      updated with logical handler' Source. Need to verify if this

  *      scenario is still happening since Handler.close() is changed to take

  *      MessageContext.</P>

  *      <LI><P>com.sun.xml.internal.ws.handlerSOAPMessageContextImpl.getHeaders()

  *      uses SAAJ API to get headers.</P>

  *      <LI><P>SOAPMessage.writeTo() is used to write response. At present,

  *      it writes into byte[] and this byte[] is written to

  *      HttpServletResponse.</P>

  * </UL>

  * <H4>JAXB API</H4>

  * <P>JAX-WS RI uses the JAXB API to marshall/unmarshall user created

  * JAXB objects with user created {@link javax.xml.bind.JAXBContext JAXBContext}.

  * Handler, Dispatch in JAX-WS API provide ways for the user to specify his/her own

  * JAXBContext. {@link com.sun.xml.internal.ws.encoding.jaxb.JAXBTypeSerializer JAXBTypeSerializer} class uses all these methods.</P>

  * <UL>

  *      <LI><p>{@link javax.xml.bind.Marshaller#marshal(Object,XMLStreamWriter) Marshaller.marshal(Object,XMLStreamWriter)}</p>

  *      <LI><P>{@link javax.xml.bind.Marshaller#marshal(Object,Result) Marshaller.marshal(Object, DomResult)}</P>

  *      <LI><P>{@link javax.xml.bind.Unmarshaller#unmarshal(XMLStreamReader) Object Unmarshaller.unmarshal(XMLStreamReader)}</P>

  *      <LI><P>{@link javax.xml.bind.Unmarshaller#unmarshal(Source) Object Unmarshaller.unmarshal(Source)}</P>

  * </UL>

  * The following two JAXB classes are implemented by JAX-WS to enable/implement MTOM and XOP

  * <UL>

  *      <LI><P>{@link javax.xml.bind.attachment.AttachmentMarshaller AttachmentMarshaller}</P>

  *      <LI><P>{@link javax.xml.bind.attachment.AttachmentUnmarshaller AttachmentUnmarshaller}</P>

  * </UL>

  * <H4>JAXB Runtime-API (private contract)</H4>

  * <P>JAX-WS RI uses these private API for serialization/deserialization

  * purposes. This private API is used to serialize/deserialize method

  * parameters at the time of JAXBTypeSerializer class uses all

  * these methods.</P>

  * <UL>

  *      <LI><P>{@link com.sun.xml.internal.bind.api.Bridge#marshal(BridgeContext, Object, XMLStreamWriter) Bridge.marshal(BridgeContext, Object, XMLStreamWriter)}</P>

  *      <LI><P>{@link com.sun.xml.internal.bind.api.Bridge#marshal(BridgeContext, Object, Node) Bridge.marshal(BridgeContext, Object, Node)}</P>

  *      <LI><P>{@link com.sun.xml.internal.bind.api.Bridge#unmarshal(BridgeContext, XMLStreamReader) Object Bridge.unmarshal(BridgeContext, XMLStreamReader)}</P>

  * </UL>

  *

  * @ArchitectureDocument

  **/

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

 import com.sun.xml.internal.bind.api.BridgeContext;

 import javax.xml.stream.XMLStreamReader;

 import javax.xml.stream.XMLStreamWriter;

 import javax.xml.transform.Source;

 import javax.xml.transform.Result;

 import org.w3c.dom.Node;