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Diffstat (limited to '')
-rw-r--r-- | sca-java-1.x/tags/1.6.2-RC1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6.2-RC1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java b/sca-java-1.x/tags/1.6.2-RC1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/impl/DOMHelper.java new file mode 100644 index 0000000000..64b3d22c10 --- /dev/null +++ b/sca-java-1.x/tags/1.6.2-RC1/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; + } + +} |