TUSCANY-2663 - Merging latest code to support extended elements to 2.x development stream

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@736500 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 114 insertions, 258 deletions

diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java
index 38da7740cd..68c46a2301 100644
--- a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/AnyElementProcessor.java
@@ -18,50 +18,45 @@
  */
 package org.apache.tuscany.sca.contribution.processor.xml;
 
+import static javax.xml.stream.XMLStreamConstants.CDATA;
+import static javax.xml.stream.XMLStreamConstants.CHARACTERS;
 import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
 import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
 
 import java.util.ArrayList;
-import java.util.logging.Level;
-import java.util.logging.Logger;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
+import javax.xml.namespace.NamespaceContext;
 import javax.xml.namespace.QName;
-import javax.xml.parsers.DocumentBuilderFactory;
-import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamException;
 import javax.xml.stream.XMLStreamReader;
 import javax.xml.stream.XMLStreamWriter;
+import javax.xml.stream.events.XMLEvent;
 
+import org.apache.tuscany.sca.contribution.Constants;
 import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
 import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
 import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
 import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
 import org.apache.tuscany.sca.core.FactoryExtensionPoint;
 import org.apache.tuscany.sca.monitor.Monitor;
-import org.apache.tuscany.sca.monitor.Problem;
-import org.apache.tuscany.sca.monitor.Problem.Severity;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.NamedNodeMap;
-import org.w3c.dom.Node;
-import org.w3c.dom.traversal.DocumentTraversal;
-import org.w3c.dom.traversal.NodeFilter;
-import org.w3c.dom.traversal.NodeIterator;
-import org.w3c.dom.traversal.TreeWalker;
 
 public class AnyElementProcessor implements StAXArtifactProcessor<Object> {
-	private static final QName ANY_ELEMENT = new QName("http://www.w3.org/2001/XMLSchema", "anyElement");
-	
-	private static final Logger logger = Logger.getLogger(AnyElementProcessor.class.getName());
-	private DocumentBuilderFactory documentBuilderFactory;
-	private Document document;
-	private Monitor monitor;
-	
-	public AnyElementProcessor(FactoryExtensionPoint modelFactories, Monitor monitor) {
-		documentBuilderFactory = modelFactories.getFactory(DocumentBuilderFactory.class);
-		this.monitor = monitor;
-	}
-	
+    private static final QName ANY_ELEMENT = new QName(Constants.XMLSCHEMA_NS, "anyElement");
+
+    private XMLInputFactory xmlInputFactory;
+    @SuppressWarnings("unused")
+    private Monitor monitor;
+
+
+    public AnyElementProcessor(FactoryExtensionPoint modelFactories, Monitor monitor) {
+        xmlInputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        this.monitor = monitor;
+    }
 
     public QName getArtifactType() {
         return ANY_ELEMENT;
@@ -70,240 +65,97 @@ public class AnyElementProcessor implements StAXArtifactProcessor<Object> {
     public Class<Object> getModelType() {
         return Object.class;
     }
-    
-	/**
-	 * Reads the contetns of the unknown elements and generates the DOM	
-	 * @param reader
-	 * @param name
-	 * @return
-	 * @throws XMLStreamException
-	 */
+
+    /**
+     * Reads the contetns of the unknown elements and generates a custom
+     * implementation of XMLStreamReader i.e. XMLEventsStreamReader
+     * 
+     * @param reader
+     * @return
+     * @throws XMLStreamException
+     */
+    @SuppressWarnings("unchecked")
     public Object read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
-		
-		int event = reader.getEventType();
-		int level = 0;
-		ArrayList<String> elementList = new ArrayList<String>();
-		document = createDocument();
-		
-		QName name = reader.getName();
-		
-		while(reader.hasNext()){
-	    	switch(event){
-		    	case START_ELEMENT:
-		    		elementList.add(reader.getName().getLocalPart());
-		    		if(level == 0){
-		    			generateDOM(reader,null);
-		    			level++;
-		    		}
-		    		else{
-		    			generateDOM(reader,elementList.get(elementList.size()-2).toString());
-		    		}
-		    		
-		    		break;
-		    	case END_ELEMENT:
-		    		elementList.remove(reader.getName().getLocalPart());
-	    	}
-	    	if(reader.hasNext()){
-	    		event = reader.next();
-	    	}
-	      	
-	      	if(event == START_ELEMENT || event == END_ELEMENT){
-	      		if(reader.getName().equals(name)){
-	      			break;
-	      		}
-	      	}
-	    }
-		return document;
-	}
 
-	/**
-	 * Writes unknown portions back to the writer
-	 * @param model
-	 * @param writer
-	 */
-	public void write(Object model, XMLStreamWriter writer) {
-		
-		if( ! (model instanceof Document)) {
-			return;
-		}
-		
-		Document doc = (Document)model;
-		try{
-			DocumentTraversal traversal = (DocumentTraversal)doc;
-			TreeWalker walker = traversal.createTreeWalker(doc.getDocumentElement(),NodeFilter.SHOW_ALL, null, true);
-			writeDOM(walker,writer);
-		}
-		catch(Exception e){
-			if (logger.isLoggable(Level.SEVERE)) {
-                logger.log(Level.SEVERE, "Document not created ");
-            }
-			error("Document not created",document,e);
-		}
-	}
+        // Custom variables
+        String currentElement = null;
+        List eventsList = new ArrayList();
 
-    public void resolve(Object arg0, ModelResolver arg1) throws ContributionResolveException {
-    	
-    }
-    
-	/**
-	 * Method to generate the DOM
-	 * @param reader
-	 * @param parent
-	 * @throws Exception 
-	 */
-	//private void generateDOM(String elementText, String parent) {
-	private void generateDOM(XMLStreamReader reader, String parent) {
-		try{
-			String elePrefix = reader.getPrefix();
-			String eleQName = reader.getLocalName();
-			if (elePrefix != null && elePrefix.length() != 0) {
-                eleQName = elePrefix + ":" + eleQName;
-            }
-			
-			Element element = document.createElementNS(reader.getNamespaceURI(), eleQName);
-				
-			int attributeCount = reader.getAttributeCount();
-			for(int i = 0;i < attributeCount;i++){
-				String ns = reader.getAttributeNamespace(i);
-                String prefix = reader.getAttributePrefix(i);
-                String qname = reader.getAttributeLocalName(i);
-                String value = reader.getAttributeValue(i);
-                if (prefix != null && prefix.length() != 0) {
-                    qname = prefix + ":" + qname;
-                }
-                element.setAttributeNS(ns,qname,value);
-			}
-			if(parent == null){
-				if(document != null){
-					document.appendChild(element);
-				}
-				else{
-					if (logger.isLoggable(Level.SEVERE)) {
-	                    logger.log(Level.SEVERE, "Document not created ");
-	                }
-					error("Document not created",document,element);
-				}
-			}
-			else{
-				Node parentNode = getParentNode(document,parent);
-				if(parentNode != null){
-					parentNode.appendChild(element);
-				}
-				else{
-					if (logger.isLoggable(Level.SEVERE)) {
-						logger.log(Level.SEVERE, "Parent node not found");
-					}
-					error("Parent node not found",document,parentNode.getNodeName());
-				}
-			}
-		}
-		catch(Exception e){
-			e.printStackTrace();
-			if (logger.isLoggable(Level.SEVERE)) {
-                logger.log(Level.SEVERE, "Document not created ");
-            }
-			error("Document not created",document,e);
-		}
-	}
+        Map<String, NamespaceContext> eventContext = new HashMap<String, NamespaceContext>();
 
-	/**
-	 * Method to create an empty document
-	 * @return
-	 */
-	private Document createDocument() {
-		try {
-	        document = documentBuilderFactory.newDocumentBuilder().newDocument();
-	        return document;
-	    } catch (ParserConfigurationException e) {
-	    	e.printStackTrace();
-	    }
-	    return null;
-	}
+        try {
+            // Cast the block of unknown elements into document
+            XMLDocumentStreamReader docReader = new XMLDocumentStreamReader(reader);
 
-	/**
-	 * Method to traverse the DOM structure and write the elements 
-	 * @param walker
-	 * @param writer
-	 * @throws XMLStreamException
-	 */
-	private void writeDOM(TreeWalker walker,XMLStreamWriter writer) throws XMLStreamException {
-	  
-	    Node parent = walker.getCurrentNode();
-	    
-	    writer.writeStartElement(parent.getPrefix(), parent.getLocalName(), parent.getNamespaceURI());
-	    
-	    NamedNodeMap attributes = parent.getAttributes();
-	   
-	    for(int i = 0;i<attributes.getLength();i++){
-		   writer.writeAttribute(attributes.item(i).getPrefix(), attributes.item(i).getNamespaceURI(), attributes.item(i).getLocalName(), attributes.item(i).getNodeValue());
-	    }
-	    	   
-	    for (Node n = walker.firstChild();n != null;n = walker.nextSibling()) {
-	      writeDOM(walker,writer);
-	    }
-	    writer.writeEndElement();
-	    
-	    walker.setCurrentNode(parent);
-	}
+            XMLEventReader xmlEventReader = xmlInputFactory.createXMLEventReader(docReader);
 
-	/**
-	 * Method to get the Parent node out of the DOM structure
-	 * @param doc
-	 * @param parent
-	 * @return
-	 */
-	private Node getParentNode(Node doc,String parent) {
-		Node parentNode = null;
-		try{
-			DocumentTraversal traversal = (DocumentTraversal)doc;
-			
-			CharSequence prefixChar = ":";
-			NodeIterator iterator = traversal.createNodeIterator(document.getDocumentElement(), NodeFilter.SHOW_ELEMENT, null, true);
-			for (Node n = iterator.nextNode(); n != null; n = iterator.nextNode()) {
-				String nodeName = n.getNodeName();
-				String[] str = null;
-				if(n.getNodeName().contains(prefixChar)){
-					str = nodeName.split(":");
-					nodeName = str[str.length-1];
-				}
-				if(parent.equalsIgnoreCase(nodeName)){
-			    	  parentNode = n;
-			    	}
-			    }
-			return parentNode;
-		}
-		catch(Exception e){
-			e.printStackTrace();
-		}
-		return parentNode;
-	}
-	
-	 /**
-     * Marshals exceptions into the monitor
-     * 
-     * @param problems
-     * @param message
-     * @param model
-     */
-    private void error(String message, Object model, Exception ex) {
-    	if (monitor != null) {
-	        Problem problem = monitor.createProblem(this.getClass().getName(), "contribution-validation-messages", Severity.ERROR, model, message, ex);
-	        monitor.problem(problem);
-    	}
+            while (xmlEventReader.hasNext()) {
+                XMLEvent event = xmlEventReader.nextEvent();
+
+                // Populate the eventContext map with the current element's name
+                // and corresponding NamesapceContext
+                if (currentElement != null && !(eventContext.containsKey(currentElement))) {
+                    eventContext.put(currentElement, reader.getNamespaceContext());
+                }
+
+                // Populate the list with the XMLEvents
+                eventsList.add(event);
+                if (event.isStartElement()) {
+                    currentElement = reader.getName().getLocalPart();
+                }
+                if (event.isEndDocument()) {
+                    return new XMLEventsStreamReader(eventsList, eventContext);
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null;
     }
-    
+
     /**
-     * Report a error.
+     * Writes unknown portions back to the writer
      * 
-     * @param problems
-     * @param message
      * @param model
+     * @param writer
      */
-    private void error(String message, Object model, Object... messageParameters) {
-    	if (monitor != null) {
-	        Problem problem = monitor.createProblem(this.getClass().getName(), "contribution-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
-	        monitor.problem(problem);
-    	}
+    public void write(Object model, XMLStreamWriter writer) throws XMLStreamException {
+        if (!(model instanceof XMLStreamReader)) {
+            return;
+        }
+        XMLStreamReader reader = (XMLStreamReader)model;
+
+        int event = reader.getEventType();
+        while (reader.hasNext()) {
+            switch (event) {
+                case START_ELEMENT:
+
+                    writer.writeStartElement(reader.getPrefix(), reader.getLocalName(), reader.getNamespaceURI());
+                    for (int i = 1; i <= reader.getAttributeCount(); i++) {
+                        writer.writeAttribute(reader.getAttributePrefix(i), reader.getAttributeNamespace(i), reader
+                            .getAttributeLocalName(i), reader.getAttributeValue(i));
+                    }
+                    break;
+
+                case CHARACTERS:
+                    writer.writeCharacters(reader.getText());
+                    break;
+
+                case CDATA:
+                    writer.writeCData(reader.getText());
+                    break;
+
+                case END_ELEMENT:
+                    writer.writeEndElement();
+                    break;
+            }
+            if (reader.hasNext()) {
+                event = reader.next();
+            }
+        }
+    }
+
+    public void resolve(Object model, ModelResolver resolver) throws ContributionResolveException {
+
     }
-	
 }
diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java
index 70398deaa9..7e8b3a9d9e 100644
--- a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLDocumentStreamReader.java
@@ -37,16 +37,16 @@ import javax.xml.stream.XMLStreamReader;
  */
 public class XMLDocumentStreamReader implements XMLStreamReader {
     private static final int STATE_COMPLETE_AT_NEXT = 2; // The wrapper
-    // will produce
-    // END_DOCUMENT
+													     // will produce
+													     // END_DOCUMENT
 
-    private static final int STATE_COMPLETED = 3; // Done
+    private static final int STATE_COMPLETED = 3;        // Done
 
-    private static final int STATE_INIT = 0; // The wrapper will produce
-    // START_DOCUMENT
+    private static final int STATE_INIT = 0;             // The wrapper will produce
+    										             // START_DOCUMENT
 
-    private static final int STATE_SWITCHED = 1; // The real reader will
-    // produce events
+    private static final int STATE_SWITCHED = 1;         // The real reader will
+    											         // produce events
 
     private XMLStreamReader realReader;
     private boolean fragment;
diff --git a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java
index eecdee5ba6..351929d8a1 100644
--- a/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java
+++ b/java/sca/modules/contribution-xml/src/main/java/org/apache/tuscany/sca/contribution/processor/xml/XMLEventsStreamReader.java
@@ -20,9 +20,11 @@ package org.apache.tuscany.sca.contribution.processor.xml;
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Stack;
+
+import java.util.Iterator;
 
 import javax.xml.namespace.NamespaceContext;
 import javax.xml.namespace.QName;
@@ -39,12 +41,14 @@ public class XMLEventsStreamReader implements XMLStreamReader {
 
 	@SuppressWarnings("unused")
 	private ArrayList<XMLEvent> events = null;
+	@SuppressWarnings("unchecked")
 	private HashMap<String, NamespaceContext> eventContext = null;
 
 	private int state;
 	private java.util.Iterator<XMLEvent> iterator;
 	private XMLEvent current;
 
+	@SuppressWarnings("unchecked")
 	public XMLEventsStreamReader(List<XMLEvent> events,Map<String, NamespaceContext> map) {
 		this.events = (ArrayList<XMLEvent>) events;
 		this.eventContext = (HashMap<String, NamespaceContext>) map;