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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package com.sun.xml.internal.ws.message;

import com.sun.istack.internal.NotNull;
import com.sun.xml.internal.bind.api.Bridge;
import com.sun.xml.internal.ws.api.SOAPVersion;
import com.sun.xml.internal.ws.api.message.Header;
import com.sun.xml.internal.ws.api.message.Message;
import com.sun.xml.internal.ws.api.message.MessageHeaders;
import com.sun.xml.internal.ws.api.message.MessageWritable;
import com.sun.xml.internal.ws.api.message.Packet;
import com.sun.xml.internal.ws.api.message.saaj.SAAJFactory;
import com.sun.xml.internal.ws.encoding.TagInfoset;
import com.sun.xml.internal.ws.message.saaj.SAAJMessage;
import com.sun.xml.internal.ws.spi.db.XMLBridge;
import java.util.ArrayList;
import java.util.Collections;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import org.xml.sax.helpers.LocatorImpl;

import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Source;
import javax.xml.transform.sax.SAXSource;

import java.util.List;
import java.util.Map;

Partial Message implementation. 
 This class implements some of the Message methods. The idea is that those implementations may be non-optimal but it may save effort in implementing Message and reduce the code size. 
 Message classes that are used more commonly should examine carefully which method can be implemented faster, and override them accordingly. 
Author:
Kohsuke Kawaguchi/**
 * Partial {@link Message} implementation.
 *
 * <p>
 * This class implements some of the {@link Message} methods.
 * The idea is that those implementations may be non-optimal but
 * it may save effort in implementing {@link Message} and reduce
 * the code size.
 *
 * <p>
 * {@link Message} classes that are used more commonly should
 * examine carefully which method can be implemented faster,
 * and override them accordingly.
 *
 * @author Kohsuke Kawaguchi
 */
public abstract class AbstractMessageImpl extends Message {
    
SOAP version of this message.
Used to implement some of the methods, but nothing more than that.

So if you aren't using those methods that use this field,
this can be null.
/**
     * SOAP version of this message.
     * Used to implement some of the methods, but nothing more than that.
     *
     * <p>
     * So if you aren't using those methods that use this field,
     * this can be null.
     */
    protected final SOAPVersion soapVersion;

    protected @NotNull TagInfoset envelopeTag;
    protected @NotNull TagInfoset headerTag;
    protected @NotNull TagInfoset bodyTag;

    protected static final AttributesImpl EMPTY_ATTS;
    protected static final LocatorImpl NULL_LOCATOR = new LocatorImpl();
    protected static final List<TagInfoset> DEFAULT_TAGS;

    static void create(SOAPVersion v, List c) {
        int base = v.ordinal()*3;
        c.add(base, new TagInfoset(v.nsUri, "Envelope", "S", EMPTY_ATTS,"S", v.nsUri));
        c.add(base+1, new TagInfoset(v.nsUri, "Header", "S", EMPTY_ATTS));
        c.add(base+2, new TagInfoset(v.nsUri, "Body", "S", EMPTY_ATTS));
    }

    static {
        EMPTY_ATTS = new AttributesImpl();
        List<TagInfoset> tagList = new ArrayList<TagInfoset>();
        create(SOAPVersion.SOAP_11, tagList);
        create(SOAPVersion.SOAP_12, tagList);
        DEFAULT_TAGS = Collections.unmodifiableList(tagList);
    }

    protected AbstractMessageImpl(SOAPVersion soapVersion) {
        this.soapVersion = soapVersion;
    }

    @Override
    public SOAPVersion getSOAPVersion() {
        return soapVersion;
    }
    
Copy constructor.
/**
     * Copy constructor.
     */
    protected AbstractMessageImpl(AbstractMessageImpl that) {
        this.soapVersion = that.soapVersion;
        this.copyFrom(that);
    }

    @Override
    public Source readEnvelopeAsSource() {
        return new SAXSource(new XMLReaderImpl(this), XMLReaderImpl.THE_SOURCE);
    }

    @Override
    public <T> T readPayloadAsJAXB(Unmarshaller unmarshaller) throws JAXBException {
        if(hasAttachments())
            unmarshaller.setAttachmentUnmarshaller(new AttachmentUnmarshallerImpl(getAttachments()));
        try {
            return (T) unmarshaller.unmarshal(readPayloadAsSource());
        } finally{
            unmarshaller.setAttachmentUnmarshaller(null);
        }
    }
    
Deprecated:
/** @deprecated */
    @Override
    public <T> T readPayloadAsJAXB(Bridge<T> bridge) throws JAXBException {
        return bridge.unmarshal(readPayloadAsSource(),
            hasAttachments()? new AttachmentUnmarshallerImpl(getAttachments()) : null );
    }

    @Override
    public <T> T readPayloadAsJAXB(XMLBridge<T> bridge) throws JAXBException {
        return bridge.unmarshal(readPayloadAsSource(),
            hasAttachments()? new AttachmentUnmarshallerImpl(getAttachments()) : null );
    }

    public void writeToBodyStart(XMLStreamWriter w) throws XMLStreamException {
        String soapNsUri = soapVersion.nsUri;
        w.writeStartDocument();
        w.writeStartElement("S","Envelope",soapNsUri);
        w.writeNamespace("S",soapNsUri);
        if(hasHeaders()) {
            w.writeStartElement("S","Header",soapNsUri);
            MessageHeaders headers = getHeaders();
            for (Header h : headers.asList()) {
                h.writeTo(w);
            }
            w.writeEndElement();
        }
        // write the body
        w.writeStartElement("S","Body",soapNsUri);
    }

    
Default implementation that relies on Message.writePayloadTo(XMLStreamWriter) /**
     * Default implementation that relies on {@link #writePayloadTo(XMLStreamWriter)}
     */
    @Override
    public void writeTo(XMLStreamWriter w) throws XMLStreamException {
        writeToBodyStart(w);
        writePayloadTo(w);

        w.writeEndElement();
        w.writeEndElement();
        w.writeEndDocument();
    }

    
Writes the whole envelope as SAX events.
/**
     * Writes the whole envelope as SAX events.
     */
    @Override
    public void writeTo( ContentHandler contentHandler, ErrorHandler errorHandler ) throws SAXException {
        String soapNsUri = soapVersion.nsUri;

        contentHandler.setDocumentLocator(NULL_LOCATOR);
        contentHandler.startDocument();
        contentHandler.startPrefixMapping("S",soapNsUri);
        contentHandler.startElement(soapNsUri,"Envelope","S:Envelope",EMPTY_ATTS);
        if(hasHeaders()) {
            contentHandler.startElement(soapNsUri,"Header","S:Header",EMPTY_ATTS);
            MessageHeaders headers = getHeaders();
            for (Header h : headers.asList()) {
                h.writeTo(contentHandler,errorHandler);
            }
            contentHandler.endElement(soapNsUri,"Header","S:Header");
        }
        // write the body
        contentHandler.startElement(soapNsUri,"Body","S:Body",EMPTY_ATTS);
        writePayloadTo(contentHandler,errorHandler, true);
        contentHandler.endElement(soapNsUri,"Body","S:Body");
        contentHandler.endElement(soapNsUri,"Envelope","S:Envelope");
    }

    
Writes the payload to SAX events.
Params:
fragment – 
     if true, this method will fire SAX events without start/endDocument events,
     suitable for embedding this into a bigger SAX event sequence.
     if false, this method generaets a completely SAX event sequence on its own./**
     * Writes the payload to SAX events.
     *
     * @param fragment
     *      if true, this method will fire SAX events without start/endDocument events,
     *      suitable for embedding this into a bigger SAX event sequence.
     *      if false, this method generaets a completely SAX event sequence on its own.
     */
    protected abstract void writePayloadTo(ContentHandler contentHandler, ErrorHandler errorHandler, boolean fragment) throws SAXException;

    public Message toSAAJ(Packet p, Boolean inbound) throws SOAPException {
        SAAJMessage message = SAAJFactory.read(p);
        if (message instanceof MessageWritable)
            ((MessageWritable) message)
                    .setMTOMConfiguration(p.getMtomFeature());
        if (inbound != null) transportHeaders(p, inbound, message.readAsSOAPMessage());
        return message;
    }

    
Default implementation that uses writeTo(ContentHandler, ErrorHandler) /**
     * Default implementation that uses {@link #writeTo(ContentHandler, ErrorHandler)}
     */
    @Override
    public SOAPMessage readAsSOAPMessage() throws SOAPException {
        return SAAJFactory.read(soapVersion, this);
    }

    @Override
    public SOAPMessage readAsSOAPMessage(Packet packet, boolean inbound) throws SOAPException {
        SOAPMessage msg = SAAJFactory.read(soapVersion, this, packet);
        transportHeaders(packet, inbound, msg);
        return msg;
    }

    private void transportHeaders(Packet packet, boolean inbound, SOAPMessage msg) throws SOAPException {
        Map<String, List<String>> headers = getTransportHeaders(packet, inbound);
        if (headers != null) {
            addSOAPMimeHeaders(msg.getMimeHeaders(), headers);
        }
        if (msg.saveRequired()) msg.saveChanges();
    }
}