saximpl.java

java1.6众多例子参考

                if (getNSType(nextNode) == nsType) {
                    break;
                }
            }

            _currentNode = nextNode;

            return returnNode(node);
        }
    }  // end of NamespaceAttributeIterator

    /**
     * Returns an iterator with all descendants of a node that are of
     * a given type.
     */
    public DTMAxisIterator getTypedDescendantIterator(int type)
    {
        return new TypedDescendantIterator(type);
    }

    /**
     * Returns the nth descendant of a node
     */
    public DTMAxisIterator getNthDescendant(int type, int n, boolean includeself)
    {
        DTMAxisIterator source = (DTMAxisIterator) new TypedDescendantIterator(type);
        return new NthDescendantIterator(n);
    }

    /**
     * Copy the string value of a node directly to an output handler
     */
    public void characters(final int node, SerializationHandler handler)
        throws TransletException
    {
        if (node != DTM.NULL) {
            try {
                dispatchCharactersEvents(node, handler, false);
            } catch (SAXException e) {
                throw new TransletException(e);
            }
        }
    }
    
    /**
     * Copy a node-set to an output handler
     */
    public void copy(DTMAxisIterator nodes, SerializationHandler handler)
        throws TransletException
    {
        int node;
        while ((node = nodes.next()) != DTM.NULL) {
            copy(node, handler);
        }
    }

    /**
     * Copy the whole tree to an output handler
     */
    public void copy(SerializationHandler handler) throws TransletException
    {
        copy(getDocument(), handler);
    }

    /**
     * Performs a deep copy (ref. XSLs copy-of())
     *
     * TODO: Copy namespace declarations. Can't be done until we
     *       add namespace nodes and keep track of NS prefixes
     * TODO: Copy comment nodes
     */
    public void copy(final int node, SerializationHandler handler)
        throws TransletException
    {
        copy(node, handler, false );
    }


 private final void copy(final int node, SerializationHandler handler, boolean isChild)
        throws TransletException
    {
     int nodeID = makeNodeIdentity(node);
        int eType = _exptype2(nodeID);
        int type = _exptype2Type(eType);

        try {
            switch(type)
            {
                case DTM.ROOT_NODE:
                case DTM.DOCUMENT_NODE:
                    for(int c = _firstch2(nodeID); c != DTM.NULL; c = _nextsib2(c)) {
                        copy(makeNodeHandle(c), handler, true);
                    }
                    break;
                case DTM.PROCESSING_INSTRUCTION_NODE:
                    copyPI(node, handler);
                    break;
                case DTM.COMMENT_NODE:
                    handler.comment(getStringValueX(node));
                    break;
                case DTM.TEXT_NODE:
                    boolean oldEscapeSetting = false;
                    boolean escapeBit = false;

                    if (_dontEscape != null) {
                        escapeBit = _dontEscape.getBit(getNodeIdent(node));
                        if (escapeBit) {
                            oldEscapeSetting = handler.setEscaping(false);
                        }
                    }
                    
                    copyTextNode(nodeID, handler);
        
                    if (escapeBit) {
                        handler.setEscaping(oldEscapeSetting);
                    }
                    break;
                case DTM.ATTRIBUTE_NODE:
                    copyAttribute(nodeID, eType, handler);
                    break;
                case DTM.NAMESPACE_NODE:
                    handler.namespaceAfterStartElement(getNodeNameX(node), getNodeValue(node));
                    break;
                default:
                    if (type == DTM.ELEMENT_NODE) 
                    {
                        // Start element definition
                        final String name = copyElement(nodeID, eType, handler);
                        //if(isChild) => not to copy any namespaces  from parents
                        // else copy all namespaces in scope
                        copyNS(nodeID, handler,!isChild);
                        copyAttributes(nodeID, handler);
                        // Copy element children
                        for (int c = _firstch2(nodeID); c != DTM.NULL; c = _nextsib2(c)) {
                            copy(makeNodeHandle(c), handler, true);
                        }
          
                        // Close element definition
                        handler.endElement(name);
                    }
                    // Shallow copy of attribute to output handler
                    else {
                        final String uri = getNamespaceName(node);
                        if (uri.length() != 0) {
                            final String prefix = getPrefix(node);
                            handler.namespaceAfterStartElement(prefix, uri);
                        }
                        handler.addAttribute(getNodeName(node), getNodeValue(node));
                    }
                    break;
            }
        } 
        catch (Exception e) {
            throw new TransletException(e);
        }
    
    }
    /**
     * Copies a processing instruction node to an output handler
     */
    private void copyPI(final int node, SerializationHandler handler)
	throws TransletException
    {
        final String target = getNodeName(node);
        final String value = getStringValueX(node);
      
        try {
            handler.processingInstruction(target, value);
        } catch (Exception e) {
            throw new TransletException(e);
        }
    }

    /**
     * Performs a shallow copy (ref. XSLs copy())
     */
    public String shallowCopy(final int node, SerializationHandler handler)
        throws TransletException
    {
        int nodeID = makeNodeIdentity(node);
        int exptype = _exptype2(nodeID);
        int type = _exptype2Type(exptype);
      
        try {
            switch(type)
            {
                case DTM.ELEMENT_NODE:
                    final String name = copyElement(nodeID, exptype, handler);
                    copyNS(nodeID, handler, true);
                    return name;
                case DTM.ROOT_NODE:
                case DTM.DOCUMENT_NODE:
                    return EMPTYSTRING;
                case DTM.TEXT_NODE:
                    copyTextNode(nodeID, handler);
                    return null;
                case DTM.PROCESSING_INSTRUCTION_NODE:
                    copyPI(node, handler);
                    return null;
                case DTM.COMMENT_NODE:
                    handler.comment(getStringValueX(node));
                    return null;
                case DTM.NAMESPACE_NODE:
                    handler.namespaceAfterStartElement(getNodeNameX(node), getNodeValue(node));
                    return null;
                case DTM.ATTRIBUTE_NODE:
                    copyAttribute(nodeID, exptype, handler);
                    return null;  
                default:
                    final String uri1 = getNamespaceName(node);
                    if (uri1.length() != 0) {
                        final String prefix = getPrefix(node);
                        handler.namespaceAfterStartElement(prefix, uri1);
                    }
                    handler.addAttribute(getNodeName(node), getNodeValue(node));
                    return null;
            }
        } catch (Exception e) {
            throw new TransletException(e);
        }   
    }
    
    /**
     * Returns a node' defined language for a node (if any)
     */
    public String getLanguage(int node)
    {
        int parent = node;
    	while (DTM.NULL != parent) {
            if (DTM.ELEMENT_NODE == getNodeType(parent)) {
                int langAttr = getAttributeNode(parent, "http://www.w3.org/XML/1998/namespace", "lang");

                if (DTM.NULL != langAttr) {
                    return getNodeValue(langAttr);     
                }
            }

            parent = getParent(parent);
        }      
        return(null);
    }

    /**
     * Returns an instance of the DOMBuilder inner class
     * This class will consume the input document through a SAX2
     * interface and populate the tree.
     */
    public DOMBuilder getBuilder()
    {
	return this;
    }
    
    /**
     * Return a SerializationHandler for output handling.
     * This method is used by Result Tree Fragments.
     */
    public SerializationHandler getOutputDomBuilder()
    {
        return new ToXMLSAXHandler(this, "UTF-8");
    }
    
    /**
     * Return a instance of a DOM class to be used as an RTF
     */ 
    public DOM getResultTreeFrag(int initSize, int rtfType)
    {
        return getResultTreeFrag(initSize, rtfType, true);
    }
        
    /**
     * Return a instance of a DOM class to be used as an RTF
     *
     * @param initSize The initial size of the DOM.
     * @param rtfType The type of the RTF
     * @param addToManager true if the RTF should be registered with the DTMManager.
     * @return The DOM object which represents the RTF.
     */ 
    public DOM getResultTreeFrag(int initSize, int rtfType, boolean addToManager)
    {
    	if (rtfType == DOM.SIMPLE_RTF) {
            if (addToManager) {
                int dtmPos = _dtmManager.getFirstFreeDTMID();
    	        SimpleResultTreeImpl rtf = new SimpleResultTreeImpl(_dtmManager,
    	                                   dtmPos << DTMManager.IDENT_DTM_NODE_BITS);
    	        _dtmManager.addDTM(rtf, dtmPos, 0);
    	        return rtf;
    	    }
            else {
            	return new SimpleResultTreeImpl(_dtmManager, 0);
            }
    	}
    	else if (rtfType == DOM.ADAPTIVE_RTF) {
            if (addToManager) {
                int dtmPos = _dtmManager.getFirstFreeDTMID();
    	        AdaptiveResultTreeImpl rtf = new AdaptiveResultTreeImpl(_dtmManager,
    	                               dtmPos << DTMManager.IDENT_DTM_NODE_BITS,
    	                               m_wsfilter, initSize, m_buildIdIndex);
    	        _dtmManager.addDTM(rtf, dtmPos, 0);
    	        return rtf;
    	
    	    }
    	    else {
            	return new AdaptiveResultTreeImpl(_dtmManager, 0,
    	                               m_wsfilter, initSize, m_buildIdIndex);
            }    	
    	}
    	else {
    	    return (DOM) _dtmManager.getDTM(null, true, m_wsfilter,
                                            true, false, false,
                                            initSize, m_buildIdIndex);
        }
    }

    /**
     * %HZ% Need Javadoc
     */
    public Hashtable getElementsWithIDs() {
        if (m_idAttributes == null) {
            return null;
        }

        // Convert a java.util.Hashtable to an xsltc.runtime.Hashtable
        Enumeration idValues = m_idAttributes.keys();
        if (!idValues.hasMoreElements()) {
            return null;
        }

        Hashtable idAttrsTable = new Hashtable();

        while (idValues.hasMoreElements()) {
            Object idValue = idValues.nextElement();

            idAttrsTable.put(idValue, m_idAttributes.get(idValue));
        }

        return idAttrsTable;
    }

    /**
     * The getUnparsedEntityURI function returns the URI of the unparsed
     * entity with the specified name in the same document as the context
     * node (see [3.3 Unparsed Entities]). It returns the empty string if
     * there is no such entity.
     */
    public String getUnparsedEntityURI(String name)
    {
        // Special handling for DOM input
        if (_document != null) {
            String uri = "";
            DocumentType doctype = _document.getDoctype();
            if (doctype != null) {
                NamedNodeMap entities = doctype.getEntities();
                
                if (entities == null) {
                    return uri;
                }
                
                Entity entity = (Entity) entities.getNamedItem(name);
                
                if (entity == null) {
                    return uri;
                }
                
                String notationName = entity.getNotationName();
                if (notationName != null) {
                    uri = entity.getSystemId();
                    if (uri == null) {
                        uri = entity.getPublicId();
                    }
                }
            }
            return uri;
        }
        else {
            return super.getUnparsedEntityURI(name);
        }	
    }

}