1 files changed, 163 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC5/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java b/tags/java/sca/2.0-M3-RC5/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java
new file mode 100644
index 0000000000..64b3d22c10
--- /dev/null
+++ b/tags/java/sca/2.0-M3-RC5/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java
@@ -0,0 +1,163 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.databinding.impl;
+
+import javax.xml.namespace.QName;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.apache.tuscany.sca.databinding.TransformationContext;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.w3c.dom.Attr;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+/**
+ * Helper for DOM
+ *
+ * @version $Rev$ $Date$
+ */
+public final class DOMHelper {
+    private static DocumentBuilderFactory FACTORY;
+
+    private DOMHelper() {
+    }
+
+    public static Document newDocument() throws ParserConfigurationException {
+        return newDocumentBuilder().newDocument();
+    }
+
+    public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException {
+        init();
+        return FACTORY.newDocumentBuilder();
+    }
+
+    /**
+     * 
+     */
+    private static synchronized void init() {
+        if (FACTORY == null) {
+            FACTORY = DocumentBuilderFactory.newInstance();
+            FACTORY.setNamespaceAware(true);
+        }
+    }
+
+    public static QName getQName(Node node) {
+        String ns = node.getNamespaceURI();
+        if (ns == null) {
+            ns = "";
+        }
+        // node.getLocalName() will return null if it is created using DOM Level
+        // 1 method
+        // such as createElement()
+        return new QName(ns, node.getNodeName());
+    }
+
+    public static Element createElement(Document document, QName name) {
+        String prefix = name.getPrefix();
+        String qname =
+            (prefix != null && prefix.length() > 0) ? prefix + ":" + name.getLocalPart() : name.getLocalPart();
+        return document.createElementNS(name.getNamespaceURI(), qname);
+    }
+
+    /**
+     * Wrap an element as a DOM document
+     * @param node
+     * @return
+     */
+    public static Document promote(Node node) {
+        if (node instanceof Document) {
+            return (Document)node;
+        }
+        Element element = (Element)node;
+        Document doc = element.getOwnerDocument();
+        if (doc.getDocumentElement() == element) {
+            return doc;
+        }
+        doc = (Document)element.getOwnerDocument().cloneNode(false);
+        Element schema = (Element)doc.importNode(element, true);
+        doc.appendChild(schema);
+        Node parent = element.getParentNode();
+        while (parent instanceof Element) {
+            Element root = (Element)parent;
+            NamedNodeMap nodeMap = root.getAttributes();
+            for (int i = 0; i < nodeMap.getLength(); i++) {
+                Attr attr = (Attr)nodeMap.item(i);
+                String name = attr.getName();
+                if ("xmlns".equals(name) || name.startsWith("xmlns:")) {
+                    if (schema.getAttributeNode(name) == null) {
+                        schema.setAttributeNodeNS((Attr)doc.importNode(attr, true));
+                    }
+                }
+            }
+            parent = parent.getParentNode();
+        }
+        return doc;
+    }
+
+    /**
+     * @param context
+     * @param element
+     */
+    public static Element adjustElementName(TransformationContext context, Element element) {
+        if (context != null) {
+            DataType dataType = context.getTargetDataType();
+            Object logical = dataType == null ? null : dataType.getLogical();
+            if (!(logical instanceof XMLType)) {
+                return element;
+            }
+            XMLType xmlType = (XMLType)logical;
+            QName name = new QName(element.getNamespaceURI(), element.getLocalName());
+            if (xmlType.isElement() && !xmlType.getElementName().equals(name)) {
+                QName newName = xmlType.getElementName();
+                String prefix = newName.getPrefix();
+                String qname = newName.getLocalPart();
+                if (prefix != null && !prefix.equals("")) {
+                    qname = prefix + ":" + qname;
+                }
+                Document doc = element.getOwnerDocument();
+                Element newElement = doc.createElementNS(newName.getNamespaceURI(), qname);
+                // Copy the attributes to the new element
+                NamedNodeMap attrs = element.getAttributes();
+                for (int i = 0; i < attrs.getLength(); i++) {
+                    Attr attr = (Attr)doc.importNode(attrs.item(i), true);
+                    newElement.getAttributes().setNamedItem(attr);
+                }
+
+                // Move all the children
+                while (element.hasChildNodes()) {
+                    newElement.appendChild(element.getFirstChild());
+                }
+
+                // Replace the old node with the new node
+                if (element.getParentNode() != null) {
+                    element.getParentNode().replaceChild(newElement, element);
+                }
+
+                return newElement;
+            }
+        }
+        return element;
+    }
+
+}