domserializerimpl.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 1,175 行 · 第 1/4 页

        Document fDocument =(node.getNodeType() == Node.DOCUMENT_NODE)
                ? (Document) node
                : node.getOwnerDocument();
        // this should run under JDK 1.1.8...
        try {
            getXmlVersion =
                fDocument.getClass().getMethod("getXmlVersion", new Class[] {});
            if (getXmlVersion != null) {
                ver = (String) getXmlVersion.invoke(fDocument, null);
            }
        } catch (Exception e) {
            // no way to test the version...
            // ignore the exception
        }
        if (ver != null && ver.equals("1.1")) {
            if (xml11Serializer == null) {
                xml11Serializer = new XML11Serializer();
                initSerializer(xml11Serializer);
            }
            // copy setting from "main" serializer to XML 1.1 serializer
            copySettings(serializer, xml11Serializer);
            ser = xml11Serializer;
        } else {
            ser = serializer;
        }        

        try {
            Method getEncoding =
                fDocument.getClass().getMethod("getInputEncoding", new Class[] {});
            if (getEncoding != null) {
                encoding = (String) getEncoding.invoke(fDocument, null);
            }
        } catch (Exception e) {
            // ignore the exception
        }
        if (encoding == null) {
            try {
                Method getEncoding =
                    fDocument.getClass().getMethod("getXmlEncoding", new Class[] {});
                if (getEncoding != null) {
                    encoding = (String) getEncoding.invoke(fDocument, null);
                }
            } catch (Exception e) {
                // ignore the exception
            }
            if (encoding == null) {
                encoding = "UTF-8";
            }
        }

        try {
            prepareForSerialization(ser, node);
            ser._format.setEncoding(encoding);
            
            // URI was specified. Handle relative URIs.
            String expanded = XMLEntityManager.expandSystemId(URI, null, true);
            URL url = new URL(expanded != null ? expanded : URI);
            OutputStream out = null;
            String protocol = url.getProtocol();
            String host = url.getHost();
            // Use FileOutputStream if this URI is for a local file.
            if (protocol.equals("file") 
                && (host == null || host.length() == 0 || host.equals("localhost"))) {
                // REVISIT: We have to decode %nn sequences. For
                // now files containing spaces and other characters
                // which were escaped in the URI will fail. -- mrglavas
                out = new FileOutputStream(new File(url.getPath()));
            }
            // Try to write to some other kind of URI. Some protocols
            // won't support this, though HTTP should work.
            else {
                URLConnection urlCon = url.openConnection();
                urlCon.setDoInput(false);
                urlCon.setDoOutput(true);
                urlCon.setUseCaches(false); // Enable tunneling.
                if (urlCon instanceof HttpURLConnection) {
                    // The DOM L3 LS CR says if we are writing to an HTTP URI
                    // it is to be done with an HTTP PUT. 
                    HttpURLConnection httpCon = (HttpURLConnection) urlCon;
                    httpCon.setRequestMethod("PUT");
                }
                out = urlCon.getOutputStream();
            }
            ser.setOutputByteStream(out);

            if (node.getNodeType() == Node.DOCUMENT_NODE)
                ser.serialize((Document) node);
            else if (node.getNodeType() == Node.DOCUMENT_FRAGMENT_NODE)
                ser.serialize((DocumentFragment) node);
            else if (node.getNodeType() == Node.ELEMENT_NODE)
                ser.serialize((Element) node);
            else
                return false;
        } catch (RuntimeException e) {
            if (e == DOMNormalizer.abort){
                // stopped at user request
                return false;
            }
            throw new LSException(LSException.SERIALIZE_ERR, e.toString());            
        } catch (Exception e) {
            if (ser.fDOMErrorHandler != null) {
                DOMErrorImpl error = new DOMErrorImpl();
                error.fException = e;
                error.fMessage = e.getMessage();
                error.fSeverity = DOMError.SEVERITY_ERROR;
                ser.fDOMErrorHandler.handleError(error);
            }
            throw new LSException(LSException.SERIALIZE_ERR, e.toString());
        }
        return true;
    } //writeURI
    
    
    //
    //  Private methods
    //

    private void prepareForSerialization(XMLSerializer ser, Node node) {
        ser.reset();
        ser.features = features;
        ser.fDOMErrorHandler = fErrorHandler;
        ser.fNamespaces = (features & NAMESPACES) !=0;
        ser._format.setOmitComments((features & COMMENTS)==0);
        ser._format.setOmitXMLDeclaration((features & XMLDECL) == 0);   
 
        if ((features & WELLFORMED) != 0) {
            // REVISIT: this is inefficient implementation of well-formness. Instead, we should check
            // well-formness as we serialize the tree
            Node next, root;
            root = node;
            Method versionChanged;
            boolean verifyNames = true;
            Document document =(node.getNodeType() == Node.DOCUMENT_NODE)
                    ? (Document) node
                    : node.getOwnerDocument();
            try {
                versionChanged = document.getClass().getMethod("isXMLVersionChanged()", new Class[] {});
                if (versionChanged != null) {
                    verifyNames = ((Boolean)versionChanged.invoke(document, null)).booleanValue();
                }
            } catch (Exception e) {
                //no way to test the version...
                //ignore the exception
            }
            while (node != null) {
              verify(node, verifyNames, false);
              // Move down to first child
              next = node.getFirstChild();
              // No child nodes, so walk tree
              while (next == null) {
                // Move to sibling if possible.
                next = node.getNextSibling();
                if (next == null){
                    node = node.getParentNode();
                    if (root == node){
                        next = null;
                        break;                   
                    }
                    next = node.getNextSibling();
                }
              }
              node = next;
          }
 

        }
    }
    
    
    private void verify (Node node, boolean verifyNames, boolean xml11Version){

        int type = node.getNodeType();
        fLocator.fRelatedNode = node;
        boolean wellformed;
        switch (type) { 
            case Node.DOCUMENT_NODE:{
                break;
            }
            case Node.DOCUMENT_TYPE_NODE:{
                break;
            }
            case Node.ELEMENT_NODE:{               
                if (verifyNames){
                    if((features & NAMESPACES) != 0){
                        wellformed = CoreDocumentImpl.isValidQName(node.getPrefix() , node.getLocalName(), xml11Version) ;
                    }
                    else{
                        wellformed = CoreDocumentImpl.isXMLName(node.getNodeName() , xml11Version);
                    }
                    if (!wellformed){
                            if (!wellformed){
                                if (fErrorHandler != null) {
                                    String msg = DOMMessageFormatter.formatMessage(
                                        DOMMessageFormatter.DOM_DOMAIN, 
                                        "wf-invalid-character-in-node-name", 
                                        new Object[]{"Element", node.getNodeName()});
                                        DOMNormalizer.reportDOMError(fErrorHandler, fError, fLocator, msg, DOMError.SEVERITY_FATAL_ERROR, 
                                        "wf-invalid-character-in-node-name");
                                }
                        
                            }                       
                    }
                }
                
                AttributeMap attributes = (node.hasAttributes()) ? (AttributeMap) node.getAttributes() : null; 
                if (attributes != null) {
                    for (int i = 0; i < attributes.getLength(); ++i) {
                        Attr attr = (Attr) attributes.item(i);
                        fLocator.fRelatedNode = attr;
                        DOMNormalizer.isAttrValueWF( fErrorHandler, fError, fLocator, 
                                      attributes,(AttrImpl) attr, attr.getValue(), xml11Version);
                        if (verifyNames) {
                            wellformed = CoreDocumentImpl.isXMLName( attr.getNodeName(), xml11Version);
                            if (!wellformed) {
                                    String msg =
                                        DOMMessageFormatter.formatMessage(
                                            DOMMessageFormatter.DOM_DOMAIN,
                                            "wf-invalid-character-in-node-name",
                                            new Object[] { "Attr", node.getNodeName()});
                                    DOMNormalizer.reportDOMError( fErrorHandler, fError, fLocator, msg, DOMError.SEVERITY_FATAL_ERROR,
                                        "wf-invalid-character-in-node-name");
                            }
                        }
                    }

                }
                
                break;
            }
        
        case Node.COMMENT_NODE: {
            // only verify well-formness if comments included in the tree
            if ((features & COMMENTS) != 0)
                DOMNormalizer.isCommentWF(fErrorHandler, fError, fLocator, ((Comment)node).getData(), xml11Version);
            break;
        }
        case Node.ENTITY_REFERENCE_NODE: {
            // only if entity is preserved in the tree
            if (verifyNames && (features & ENTITIES) != 0){
                CoreDocumentImpl.isXMLName(node.getNodeName() , xml11Version);
            }
            break;
            
        }
        case Node.CDATA_SECTION_NODE: {
            // verify content
            DOMNormalizer.isXMLCharWF(fErrorHandler, fError, fLocator, node.getNodeValue(), xml11Version);
            // the ]]> string will be checked during serialization
            break;
        }
        case Node.TEXT_NODE:{
            DOMNormalizer.isXMLCharWF(fErrorHandler, fError, fLocator, node.getNodeValue(), xml11Version);
            break;
        }
        case Node.PROCESSING_INSTRUCTION_NODE:{
            ProcessingInstruction pinode = (ProcessingInstruction)node ;
            String target = pinode.getTarget();
            if (verifyNames) {
                if (xml11Version) {
                    wellformed = XML11Char.isXML11ValidName(target);
                } else {
                    wellformed = XMLChar.isValidName(target);
                }

                if (!wellformed) {
                    String msg =
                        DOMMessageFormatter.formatMessage(
                            DOMMessageFormatter.DOM_DOMAIN,
                            "wf-invalid-character-in-node-name",
                            new Object[] { "Element", node.getNodeName()});
                    DOMNormalizer.reportDOMError(
                        fErrorHandler,
                        fError,
                        fLocator,
                        msg,
                        DOMError.SEVERITY_FATAL_ERROR,
                        "wf-invalid-character-in-node-name");
                }
            }              
            DOMNormalizer.isXMLCharWF(fErrorHandler, fError, fLocator, pinode.getData(), xml11Version);
            break;
        }        
        }
               
    }

}//DOMSerializerImpl