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/*
* Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* This document describes the architecture of client side
* JAX-WS 2.0.1 runtime.
*
*
JAX-WS 2.0.1 Client Sequence Diagram
* 
* JAX-WS 2.0.1 Asynchronous Invocation Sequence Diagram
* 
* JAX-WS 2.0.1 Dispatch Invocation Sequence Diagram
* 
* Message Flow
* {@link WSServiceDelegate} provides client view of a Web service.
* WSServiceDelegate.getPort returns an instance of {@code com.sun.xml.ws.client.EndpointIFInvocationHandler}
* with {@code com.sun.pept.ept.ContactInfoList} and {@code com.sun.pept.Delegate}
* initialized. A method invocation on the port, obtained from WebService, invokes
* {@code com.sun.xml.ws.client.EndpointIFInvocationHandler#invoke}. This method
* then creates a {@code com.sun.pept.ept.MessageInfo} and populates the data
* (parameters specified by the user) and metadata such as RuntimeContext, RequestContext,
* Message Exchange Pattern into this MessageInfo. This method then invokes
* {@code com.sun.pept.Delegate#send} and returns the response.
*
* The Delegate.send method iterates through the ContactInfoList and picks up the
* correct {@code com.sun.pept.ept.ContactInfo} based upon the binding id of
* {@link jakarta.xml.ws.BindingProvider} and sets it on the MessageInfo. After the
* Delegate obtains a specific ContactInfo it uses that ContactInfo to obtain a
* protocol-specific {@code com.sun.pept.protocol.MessageDispatcher}. There will be
* two types of client-side MessageDispatchers for JAX-WS 2.0.1,
* {@code com.sun.xml.ws.protocol.soap.client.SOAPMessageDispatcher} and
* {@code com.sun.xml.ws.protocol.xml.client.XMLMessageDispatcher}. The Delegate
* then invokes {@code com.sun.pept.protocol.MessageDispatcher#send}. The
* MessageDispatcher.send method makes a decision about the synchronous and
* asynchronous nature of the message exchange pattern and invokes separate methods
* accordingly.
*
* The MessageDispatcher uses ContactInfo to obtain
* a {@code com.sun.xml.ws.encoding.soap.client.SOAPXMLEncoder} which converts
* the MessageInfo to {@code com.sun.xml.ws.encoding.soap.InternalMessage}.
* There will be two types of client-side SOAPXMLEncoder for JAX-WS 2.0.1,
* SOAPXMEncoder for SOAP 1.1 and {@code com.sun.xml.ws.encoding.soap.client.SOAP12XMLEncoder}
* for SOAP 1.2. The MessageDispatcher invokes configured handlers and use the
* codec to convert the InternalMessage to a {@link jakarta.xml.soap.SOAPMessage}.
* The metadata from the MessageInfo is classified into {@link jakarta.xml.soap.MimeHeaders}
* of this SOAPMessage and context information for {@code com.sun.xml.ws.api.server.WSConnection}.
* The SOAPMessge is then written to the output stream of the WSConnection
* obtained from MessageInfo.
*
* The MessageDispatcher.receive method handles the response. The
* SOAPMessageDispatcher extracts the SOAPMessage from the input stream of
* WSConnection and performs the mustUnderstand processing followed by invocation
* of any handlers. The MessageDispatcher uses ContactInfo to obtain a
* {@code com.sun.xml.ws.encoding.soap.client.SOAPXMLDecoder} which converts the SOAPMessage
* to InternalMessage and then InternalMessage to MessageInfo. There will be two types of
* client-side SOAPXMLDecoder for JAX-WS 2.0.1, SOAPXMLDencoder for SOAP 1.1 and
* {@code com.sun.xml.ws.encoding.soap.client.SOAP12XMLDecoder} for SOAP 1.2. The
* response is returned back to the client code via Delegate.
*
*
External Interactions
* SAAJ API
*
* JAX-WS creates SAAJ 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.
*
* MessageFactory(binding).createMessage(MimeHeaders, InputStream)
*
* SOAPMessage parses the content from the stream including MIME
* data
* com.sun.xml.ws.server.SOAPMessageDispatcher::checkHeadersPeekBody()
* SOAPMessage.getSOAPHeader() is used for mustUnderstand processing
* of headers. It further uses
* SOAPHeader.examineMustUnderstandHeaderElements(role)
* SOAPMessage.getSOAPBody().getFistChild() is used for guessing the
* MEP of the request
* com.sun.xml.ws.handler.HandlerChainCaller:insertFaultMessage()
* SOAPMessage.getSOAPPart().getEnvelope() and some other SAAJ calls
* are made to create a fault in the SOAPMessage
* com.sun.xml.ws.handler.LogicalMessageImpl::getPayload()
* interacts with SAAJ to get body from SOAPMessage
* com.sun.xml.ws.encoding.soap.SOAPEncoder.toSOAPMessage(com.sun.xml.ws.encoding.soap.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.
* com.sun.xml.ws.handlerSOAPMessageContextImpl.getHeaders()
* uses SAAJ API to get headers.
* SOAPMessage.writeTo() is used to write response. At present,
* it writes into byte[] and this byte[] is written to
* HttpServletResponse.
*
* JAXB API
* JAX-WS RI uses the JAXB API to marshall/unmarshall user created
* JAXB objects with user created {@link jakarta.xml.bind.JAXBContext JAXBContext}.
* Handler, Dispatch in JAX-WS API provide ways for the user to specify his/her own
* JAXBContext. {@code com.sun.xml.ws.encoding.jaxb.JAXBTypeSerializer JAXBTypeSerializer} class uses all these methods.
*
* {@link jakarta.xml.bind.Marshaller#marshal(Object,XMLStreamWriter) Marshaller.marshal(Object,XMLStreamWriter)}
* {@link jakarta.xml.bind.Marshaller#marshal(Object,Result) Marshaller.marshal(Object, DomResult)}
* {@link jakarta.xml.bind.Unmarshaller#unmarshal(XMLStreamReader) Object Unmarshaller.unmarshal(XMLStreamReader)}
* {@link jakarta.xml.bind.Unmarshaller#unmarshal(Source) Object Unmarshaller.unmarshal(Source)}
*
* The following two JAXB classes are implemented by JAX-WS to enable/implement MTOM and XOP
*
* {@link jakarta.xml.bind.attachment.AttachmentMarshaller AttachmentMarshaller}
* {@link jakarta.xml.bind.attachment.AttachmentUnmarshaller AttachmentUnmarshaller}
*
*
**/
package com.sun.xml.ws.client;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.w3c.dom.Node;