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/*
 * Copyright (c) 1997, 2019 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
 */

package com.sun.xml.ws.message.saaj;

import com.sun.istack.FragmentContentHandler;
import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
import com.sun.istack.XMLStreamException2;
import com.sun.xml.bind.api.Bridge;
import com.sun.xml.bind.unmarshaller.DOMScanner;
import com.sun.xml.ws.api.SOAPVersion;
import com.sun.xml.ws.api.message.*;
import com.sun.xml.ws.message.AttachmentUnmarshallerImpl;
import com.sun.xml.ws.spi.db.XMLBridge;
import com.sun.xml.ws.streaming.DOMStreamReader;
import com.sun.xml.ws.util.ASCIIUtility;
import com.sun.xml.ws.util.DOMUtil;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
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.activation.DataHandler;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.soap.*;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.ws.WebServiceException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * {@link Message} implementation backed by {@link SOAPMessage}.
 *
 * @author Vivek Pandey
 * @author Rama Pulavarthi
 */
public class SAAJMessage extends Message {
    // flag to switch between representations
    private boolean parsedMessage;
    // flag to check if Message API is exercised;
    private boolean accessedMessage;
    private final SOAPMessage sm;

    private MessageHeaders headers;
    private List bodyParts;
    private Element payload;

    private String payloadLocalName;
    private String payloadNamespace;
    private SOAPVersion soapVersion;

    //Collect the attrbutes on the enclosing elements so that the same message can be reproduced without loss of any
    // valuable info
    private NamedNodeMap bodyAttrs, headerAttrs, envelopeAttrs;

    public SAAJMessage(SOAPMessage sm) {
        this.sm = sm;
    }

    /**
     * This constructor is a convenience and called by the {@link #copy}
     *
     * @param headers
     * @param sm
     */
    private SAAJMessage(MessageHeaders headers, AttachmentSet as, SOAPMessage sm, SOAPVersion version) {
        this.sm = sm;
        this.parse();
        if(headers == null)
            headers = new HeaderList(version);
        this.headers = headers;
        this.attachmentSet = as;
    }

    private void parse() {
        if (!parsedMessage) {
            try {
                access();
                if (headers == null)
                    headers = new HeaderList(getSOAPVersion());
                SOAPHeader header = sm.getSOAPHeader();
                if (header != null) {
                    headerAttrs = header.getAttributes();
                    Iterator iter = header.examineAllHeaderElements();
                    while (iter.hasNext()) {
                        headers.add(new SAAJHeader((SOAPHeaderElement) iter.next()));
                    }
                }
                attachmentSet = new SAAJAttachmentSet(sm);

                parsedMessage = true;
            } catch (SOAPException e) {
                throw new WebServiceException(e);
            }
        }
    }
    
    protected void access() {
        if (!accessedMessage) {
            try {
                envelopeAttrs = sm.getSOAPPart().getEnvelope().getAttributes();
                Node body = sm.getSOAPBody();
                bodyAttrs = body.getAttributes();
                soapVersion = SOAPVersion.fromNsUri(body.getNamespaceURI());
                //cature all the body elements
                bodyParts = DOMUtil.getChildElements(body);
                //we treat payload as the first body part
                payload = bodyParts.size() > 0 ? bodyParts.get(0) : null;
                // hope this is correct. Caching the localname and namespace of the payload should be fine
                // but what about if a Handler replaces the payload with something else? Weel, may be it
                // will be error condition anyway
                if (payload != null) {
                    payloadLocalName = payload.getLocalName();
                    payloadNamespace = payload.getNamespaceURI();
                }
                accessedMessage = true;
            } catch (SOAPException e) {
                throw new WebServiceException(e);
            }
        }
    }

    public boolean hasHeaders() {
        parse();
        return headers.hasHeaders();
    }

    public @NotNull MessageHeaders getHeaders() {
        parse();
        return headers;
    }

    /**
     * Gets the attachments of this message
     * (attachments live outside a message.)
     */
    @Override
    public @NotNull AttachmentSet getAttachments() {
        if (attachmentSet == null) attachmentSet = new SAAJAttachmentSet(sm);
        return attachmentSet;
    }

    /**
     * Optimization hint for the derived class to check
     * if we may have some attachments.
     */
    @Override
    protected boolean hasAttachments() {
        return !getAttachments().isEmpty();
    }
        
    public @Nullable String getPayloadLocalPart() {
        soapBodyFirstChild();
        return payloadLocalName;
    }

    public String getPayloadNamespaceURI() {
        soapBodyFirstChild();
        return payloadNamespace;
    }

    public boolean hasPayload() {
        return soapBodyFirstChild() != null;
    }

    private void addAttributes(Element e, NamedNodeMap attrs) {
        if(attrs == null)
            return;
        String elPrefix = e.getPrefix();
        for(int i=0; i < attrs.getLength();i++) {
            Attr a = (Attr)attrs.item(i);
            //check if attr is ns declaration
            if("xmlns".equals(a.getPrefix()) || "xmlns".equals(a.getLocalName())) {
                if(elPrefix == null && a.getLocalName().equals("xmlns")) {
                    // the target element has already default ns declaration, dont' override it
                    continue;
                } else if(elPrefix != null && "xmlns".equals(a.getPrefix()) && elPrefix.equals(a.getLocalName())) {
                    //dont bind the prefix to ns again, its already in the target element.
                    continue;
                }
                e.setAttributeNS(a.getNamespaceURI(),a.getName(),a.getValue());
                continue;
            }
            e.setAttributeNS(a.getNamespaceURI(),a.getName(),a.getValue());
        }
    }

    public Source readEnvelopeAsSource() {
        try {
            if (!parsedMessage) {
                SOAPEnvelope se = sm.getSOAPPart().getEnvelope();
                return new DOMSource(se);

            } else {
				SOAPMessage msg = soapVersion.getMessageFactory().createMessage();
                addAttributes(msg.getSOAPPart().getEnvelope(),envelopeAttrs);

                SOAPBody newBody = msg.getSOAPPart().getEnvelope().getBody();
                addAttributes(newBody, bodyAttrs);
                for (Element part : bodyParts) {
                    Node n = newBody.getOwnerDocument().importNode(part, true);
                    newBody.appendChild(n);
                }
                addAttributes(msg.getSOAPHeader(),headerAttrs);
                for (Header header : headers.asList()) {
                    header.writeTo(msg);
                }
                SOAPEnvelope se = msg.getSOAPPart().getEnvelope();
                return new DOMSource(se);
            }
        } catch (SOAPException e) {
            throw new WebServiceException(e);
        }
    } 

    public SOAPMessage readAsSOAPMessage() throws SOAPException {
        if (!parsedMessage) {
            return sm;
        } else {
            SOAPMessage msg = soapVersion.getMessageFactory().createMessage();
            addAttributes(msg.getSOAPPart().getEnvelope(),envelopeAttrs);
            SOAPBody newBody = msg.getSOAPPart().getEnvelope().getBody();
            addAttributes(newBody, bodyAttrs);
            for (Element part : bodyParts) {
                Node n = newBody.getOwnerDocument().importNode(part, true);
                newBody.appendChild(n);
            }
            addAttributes(msg.getSOAPHeader(),headerAttrs);
            for (Header header : headers.asList()) {
              header.writeTo(msg);
            }
            for (Attachment att : getAttachments()) {
              AttachmentPart part = msg.createAttachmentPart();
              part.setDataHandler(att.asDataHandler());
              part.setContentId('<' + att.getContentId() + '>');
              addCustomMimeHeaders(att, part);
              msg.addAttachmentPart(part);
            }
            msg.saveChanges();
            return msg;
        }
    }

	private void addCustomMimeHeaders(Attachment att, AttachmentPart part) {
		if (att instanceof AttachmentEx) {
			Iterator allMimeHeaders = ((AttachmentEx) att).getMimeHeaders();
			while (allMimeHeaders.hasNext()) {
				AttachmentEx.MimeHeader mh = allMimeHeaders.next();
				String name = mh.getName();
				if (!"Content-Type".equalsIgnoreCase(name)
						&& !"Content-Id".equalsIgnoreCase(name)) {
					part.addMimeHeader(name, mh.getValue());
				}
			}
		}
	}

    public Source readPayloadAsSource() {
        access();
        return (payload != null) ? new DOMSource(payload) : null;
    }

    public  T readPayloadAsJAXB(Unmarshaller unmarshaller) throws JAXBException {
        access();
        if (payload != null) {
            if(hasAttachments())
                unmarshaller.setAttachmentUnmarshaller(new AttachmentUnmarshallerImpl(getAttachments()));
            return (T) unmarshaller.unmarshal(payload);

        }
        return null;
    }

    /** @deprecated */
    public  T readPayloadAsJAXB(Bridge bridge) throws JAXBException {
        access();
        if (payload != null)
            return bridge.unmarshal(payload,hasAttachments()? new AttachmentUnmarshallerImpl(getAttachments()) : null);
        return null;
    }
    public  T readPayloadAsJAXB(XMLBridge bridge) throws JAXBException {
        access();
        if (payload != null)
            return bridge.unmarshal(payload,hasAttachments()? new AttachmentUnmarshallerImpl(getAttachments()) : null);
        return null;
    }

    public XMLStreamReader readPayload() throws XMLStreamException {
        return soapBodyFirstChildReader();
    }

    public void writePayloadTo(XMLStreamWriter sw) throws XMLStreamException {
        access();
        try {
            for (Element part : bodyParts)
                DOMUtil.serializeNode(part, sw);
        } catch (XMLStreamException e) {
            throw new WebServiceException(e);
        }
    }

    public void writeTo(XMLStreamWriter writer) throws XMLStreamException {
        try {
            writer.writeStartDocument();
            if (!parsedMessage) {
                DOMUtil.serializeNode(sm.getSOAPPart().getEnvelope(), writer);
            } else {
                SOAPEnvelope env = sm.getSOAPPart().getEnvelope();
                DOMUtil.writeTagWithAttributes(env, writer);
                if (hasHeaders()) {
                    if(env.getHeader() != null) {
                        DOMUtil.writeTagWithAttributes(env.getHeader(), writer);
                    } else {
                        writer.writeStartElement(env.getPrefix(), "Header", env.getNamespaceURI());
                    }
                    for (Header h : headers.asList()) {
                        h.writeTo(writer);
                    }
                    writer.writeEndElement();
                }

                DOMUtil.serializeNode(sm.getSOAPBody(), writer);
                writer.writeEndElement();
            }
            writer.writeEndDocument();
            writer.flush();
        } catch (SOAPException ex) {
            throw new XMLStreamException2(ex);
            //for now. ask jaxws team what to do.
        }
    }

    public void writeTo(ContentHandler contentHandler, ErrorHandler errorHandler) throws SAXException {
        String soapNsUri = soapVersion.nsUri;
        if (!parsedMessage) {
            DOMScanner ds = new DOMScanner();
            ds.setContentHandler(contentHandler);
            ds.scan(sm.getSOAPPart());
        } else {
            contentHandler.setDocumentLocator(NULL_LOCATOR);
            contentHandler.startDocument();
            contentHandler.startPrefixMapping("S", soapNsUri);
            startPrefixMapping(contentHandler, envelopeAttrs,"S");
            contentHandler.startElement(soapNsUri, "Envelope", "S:Envelope", getAttributes(envelopeAttrs));
            if (hasHeaders()) {
                startPrefixMapping(contentHandler, headerAttrs,"S");
                contentHandler.startElement(soapNsUri, "Header", "S:Header", getAttributes(headerAttrs));
                MessageHeaders headers = getHeaders();
                for (Header h : headers.asList()) {
                    h.writeTo(contentHandler, errorHandler);
                }
                endPrefixMapping(contentHandler, headerAttrs,"S");
                contentHandler.endElement(soapNsUri, "Header", "S:Header");

            }
            startPrefixMapping(contentHandler, bodyAttrs,"S");
            // write the body
            contentHandler.startElement(soapNsUri, "Body", "S:Body", getAttributes(bodyAttrs));
            writePayloadTo(contentHandler, errorHandler, true);
            endPrefixMapping(contentHandler, bodyAttrs,"S");
            contentHandler.endElement(soapNsUri, "Body", "S:Body");
            endPrefixMapping(contentHandler, envelopeAttrs,"S");
            contentHandler.endElement(soapNsUri, "Envelope", "S:Envelope");
        }
    }
    /**
     * Gets the Attributes that are not namesapce declarations
     * @param attrs
     * @return
     */
    private AttributesImpl getAttributes(NamedNodeMap attrs) {
        AttributesImpl atts = new AttributesImpl();
        if(attrs == null)
            return EMPTY_ATTS;
        for(int i=0; i < attrs.getLength();i++) {
            Attr a = (Attr)attrs.item(i);
            //check if attr is ns declaration
            if("xmlns".equals(a.getPrefix()) || "xmlns".equals(a.getLocalName())) {
              continue;
            }
            atts.addAttribute(fixNull(a.getNamespaceURI()),a.getLocalName(),a.getName(),a.getSchemaTypeInfo().getTypeName(),a.getValue());
        }
        return atts;
    }

    /**
     * Collects the ns declarations and starts the prefix mapping, consequently the associated endPrefixMapping needs to be called.
     * @param contentHandler
     * @param attrs
     * @param excludePrefix , this is to excldue the global prefix mapping "S" used at the start
     * @throws SAXException
     */
    private void startPrefixMapping(ContentHandler contentHandler, NamedNodeMap attrs, String excludePrefix) throws SAXException {
        if(attrs == null)
            return;
        for(int i=0; i < attrs.getLength();i++) {
            Attr a = (Attr)attrs.item(i);
            //check if attr is ns declaration
            if("xmlns".equals(a.getPrefix()) || "xmlns".equals(a.getLocalName())) {
                if(!fixNull(a.getPrefix()).equals(excludePrefix)) {
                    contentHandler.startPrefixMapping(fixNull(a.getPrefix()), a.getNamespaceURI());
                }
            }
        }
    }

    private void endPrefixMapping(ContentHandler contentHandler, NamedNodeMap attrs, String excludePrefix) throws SAXException {
        if(attrs == null)
            return;
        for(int i=0; i < attrs.getLength();i++) {
            Attr a = (Attr)attrs.item(i);
            //check if attr is ns declaration
            if("xmlns".equals(a.getPrefix()) || "xmlns".equals(a.getLocalName())) {
                if(!fixNull(a.getPrefix()).equals(excludePrefix)) {
                    contentHandler.endPrefixMapping(fixNull(a.getPrefix()));
                }
            }
        }
    }

    private static String fixNull(String s) {
        if(s==null) return "";
        else        return s;
    }
    
    private void writePayloadTo(ContentHandler contentHandler, ErrorHandler errorHandler, boolean fragment) throws SAXException {
        if(fragment)
            contentHandler = new FragmentContentHandler(contentHandler);
        DOMScanner ds = new DOMScanner();
        ds.setContentHandler(contentHandler);
        ds.scan(payload);
    }

    /**
     * Creates a copy of a {@link com.sun.xml.ws.api.message.Message}.
     * 
*
* This method creates a new {@link com.sun.xml.ws.api.message.Message} whose header/payload/attachments/properties * are identical to this {@link com.sun.xml.ws.api.message.Message}. Once created, the created {@link com.sun.xml.ws.api.message.Message} * and the original {@link com.sun.xml.ws.api.message.Message} behaves independently --- adding header/ * attachment to one {@link com.sun.xml.ws.api.message.Message} doesn't affect another {@link com.sun.xml.ws.api.message.Message} * at all. *
*

Design Rationale

*
* Since a {@link com.sun.xml.ws.api.message.Message} body is read-once, sometimes * (such as when you do fail-over, or WS-RM) you need to * create an idential copy of a {@link com.sun.xml.ws.api.message.Message}. *
*
* The actual copy operation depends on the layout * of the data in memory, hence it's best to be done by * the {@link com.sun.xml.ws.api.message.Message} implementation itself. */ public Message copy() { Message result = null; try { access(); if (!parsedMessage) { result = new SAAJMessage(readAsSOAPMessage()); } else { SOAPMessage msg = soapVersion.getMessageFactory().createMessage(); SOAPBody newBody = msg.getSOAPPart().getEnvelope().getBody(); for (Element part : bodyParts) { Node n = newBody.getOwnerDocument().importNode(part, true); newBody.appendChild(n); } addAttributes(newBody, bodyAttrs); result = new SAAJMessage(getHeaders(), getAttachments(), msg, soapVersion); } return result.copyFrom(this); } catch (SOAPException e) { throw new WebServiceException(e); } } private static final AttributesImpl EMPTY_ATTS = new AttributesImpl(); private static final LocatorImpl NULL_LOCATOR = new LocatorImpl(); protected static class SAAJAttachment implements AttachmentEx { final AttachmentPart ap; String contentIdNoAngleBracket; public SAAJAttachment(AttachmentPart part) { this.ap = part; } /** * Content ID of the attachment. Uniquely identifies an attachment. */ public String getContentId() { if (contentIdNoAngleBracket == null) { contentIdNoAngleBracket = ap.getContentId(); if (contentIdNoAngleBracket != null && contentIdNoAngleBracket.charAt(0) == '<') contentIdNoAngleBracket = contentIdNoAngleBracket.substring(1, contentIdNoAngleBracket.length()-1); } return contentIdNoAngleBracket; } /** * Gets the MIME content-type of this attachment. */ public String getContentType() { return ap.getContentType(); } /** * Gets the attachment as an exact-length byte array. */ public byte[] asByteArray() { try { return ap.getRawContentBytes(); } catch (SOAPException e) { throw new WebServiceException(e); } } /** * Gets the attachment as a {@link javax.activation.DataHandler}. */ public DataHandler asDataHandler() { try { return ap.getDataHandler(); } catch (SOAPException e) { throw new WebServiceException(e); } } /** * Gets the attachment as a {@link javax.xml.transform.Source}. * Note that there's no guarantee that the attachment is actually an XML. */ public Source asSource() { try { return new StreamSource(ap.getRawContent()); } catch (SOAPException e) { throw new WebServiceException(e); } } /** * Obtains this attachment as an {@link java.io.InputStream}. */ public InputStream asInputStream() { try { return ap.getRawContent(); } catch (SOAPException e) { throw new WebServiceException(e); } } /** * Writes the contents of the attachment into the given stream. */ public void writeTo(OutputStream os) throws IOException { try { ASCIIUtility.copyStream(ap.getRawContent(), os); } catch (SOAPException e) { throw new WebServiceException(e); } } /** * Writes this attachment to the given {@link javax.xml.soap.SOAPMessage}. */ public void writeTo(SOAPMessage saaj) { saaj.addAttachmentPart(ap); } AttachmentPart asAttachmentPart(){ return ap; } public Iterator getMimeHeaders() { final Iterator it = ap.getAllMimeHeaders(); return new Iterator() { public boolean hasNext() { return it.hasNext(); } public MimeHeader next() { final javax.xml.soap.MimeHeader mh = (javax.xml.soap.MimeHeader) it.next(); return new MimeHeader() { public String getName() { return mh.getName(); } public String getValue() { return mh.getValue(); } }; } public void remove() { throw new UnsupportedOperationException(); } }; } } /** * {@link AttachmentSet} for SAAJ. * * SAAJ wants '<' and '>' for the content ID, but {@link AttachmentSet} * doesn't. S this class also does the conversion between them. */ protected static class SAAJAttachmentSet implements AttachmentSet { private Map attMap; private Iterator attIter; public SAAJAttachmentSet(SOAPMessage sm) { attIter = sm.getAttachments(); } /** * Gets the attachment by the content ID. * * @return null * if no such attachment exist. */ public Attachment get(String contentId) { // if this is the first time then create the attachment Map if (attMap == null) { if (!attIter.hasNext()) return null; attMap = createAttachmentMap(); } if(contentId.charAt(0) != '<'){ return attMap.get('<'+contentId+'>'); } return attMap.get(contentId); } public boolean isEmpty() { if(attMap!=null) return attMap.isEmpty(); else return !attIter.hasNext(); } /** * Returns an iterator over a set of elements of type T. * * @return an Iterator. */ public Iterator iterator() { if (attMap == null) { attMap = createAttachmentMap(); } return attMap.values().iterator(); } private Map createAttachmentMap() { HashMap map = new HashMap(); while (attIter.hasNext()) { AttachmentPart ap = (AttachmentPart) attIter.next(); map.put(ap.getContentId(), new SAAJAttachment(ap)); } return map; } public void add(Attachment att) { attMap.put('<'+att.getContentId()+'>', att); } } public SOAPVersion getSOAPVersion() { return soapVersion; } private XMLStreamReader soapBodyFirstChildReader; /** * This allow the subclass to retain the XMLStreamReader. */ protected XMLStreamReader getXMLStreamReader(SOAPElement soapElement) { return null; } protected XMLStreamReader createXMLStreamReader(SOAPElement soapElement) { DOMStreamReader dss = new DOMStreamReader(); dss.setCurrentNode(soapElement); return dss; } protected XMLStreamReader soapBodyFirstChildReader() { if (soapBodyFirstChildReader != null) return soapBodyFirstChildReader; soapBodyFirstChild(); if (soapBodyFirstChild != null) { soapBodyFirstChildReader = getXMLStreamReader(soapBodyFirstChild); if (soapBodyFirstChildReader == null) soapBodyFirstChildReader = createXMLStreamReader(soapBodyFirstChild); if (soapBodyFirstChildReader.getEventType() == XMLStreamReader.START_DOCUMENT) { try { while(soapBodyFirstChildReader.getEventType() != XMLStreamReader.START_ELEMENT) soapBodyFirstChildReader.next(); } catch (XMLStreamException e) { throw new RuntimeException(e); } } return soapBodyFirstChildReader; } else { payloadLocalName = null; payloadNamespace = null; return null; } } private SOAPElement soapBodyFirstChild; SOAPElement soapBodyFirstChild() { if (soapBodyFirstChild != null) return soapBodyFirstChild; try { boolean foundElement = false; for (Node n = sm.getSOAPBody().getFirstChild(); n != null && !foundElement; n = n.getNextSibling()) { if (n.getNodeType() == Node.ELEMENT_NODE) { foundElement = true; if (n instanceof SOAPElement) { soapBodyFirstChild = (SOAPElement) n; payloadLocalName = soapBodyFirstChild.getLocalName(); payloadNamespace = soapBodyFirstChild.getNamespaceURI(); return soapBodyFirstChild; } } } if(foundElement) for(Iterator i = sm.getSOAPBody().getChildElements(); i.hasNext();){ Object o = i.next(); if (o instanceof SOAPElement) { soapBodyFirstChild = (SOAPElement)o; payloadLocalName = soapBodyFirstChild.getLocalName(); payloadNamespace = soapBodyFirstChild.getNamespaceURI(); return soapBodyFirstChild; } } } catch (SOAPException e) { throw new RuntimeException(e); } return soapBodyFirstChild; } }




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