| /* |
| * 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. |
| */ |
| /* |
| * $Id: TreeWalker2Result.java 468645 2006-10-28 06:57:24Z minchau $ |
| */ |
| package org.apache.xalan.transformer; |
| |
| import org.apache.xalan.serialize.SerializerUtils; |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.ref.DTMTreeWalker; |
| import org.apache.xml.serializer.SerializationHandler; |
| import org.apache.xpath.XPathContext; |
| |
| /** |
| * Handle a walk of a tree, but screen out attributes for |
| * the result tree. |
| * @xsl.usage internal |
| */ |
| public class TreeWalker2Result extends DTMTreeWalker |
| { |
| |
| /** The transformer instance */ |
| TransformerImpl m_transformer; |
| |
| /** The result tree handler */ |
| SerializationHandler m_handler; |
| |
| /** Node where to start the tree walk */ |
| int m_startNode; |
| |
| /** |
| * Constructor. |
| * |
| * @param transformer Non-null transformer instance |
| * @param handler The Result tree handler to use |
| */ |
| public TreeWalker2Result(TransformerImpl transformer, |
| SerializationHandler handler) |
| { |
| |
| super(handler, null); |
| |
| m_transformer = transformer; |
| m_handler = handler; |
| } |
| |
| /** |
| * Perform a pre-order traversal non-recursive style. |
| * |
| * @param pos Start node for traversal |
| * |
| * @throws TransformerException |
| */ |
| public void traverse(int pos) throws org.xml.sax.SAXException |
| { |
| m_dtm = m_transformer.getXPathContext().getDTM(pos); |
| m_startNode = pos; |
| |
| super.traverse(pos); |
| } |
| |
| /** |
| * End processing of given node |
| * |
| * |
| * @param node Node we just finished processing |
| * |
| * @throws org.xml.sax.SAXException |
| */ |
| protected void endNode(int node) throws org.xml.sax.SAXException |
| { |
| super.endNode(node); |
| if(DTM.ELEMENT_NODE == m_dtm.getNodeType(node)) |
| { |
| m_transformer.getXPathContext().popCurrentNode(); |
| } |
| } |
| |
| /** |
| * Start traversal of the tree at the given node |
| * |
| * |
| * @param node Starting node for traversal |
| * |
| * @throws TransformerException |
| */ |
| protected void startNode(int node) throws org.xml.sax.SAXException |
| { |
| |
| XPathContext xcntxt = m_transformer.getXPathContext(); |
| try |
| { |
| |
| if (DTM.ELEMENT_NODE == m_dtm.getNodeType(node)) |
| { |
| xcntxt.pushCurrentNode(node); |
| |
| if(m_startNode != node) |
| { |
| super.startNode(node); |
| } |
| else |
| { |
| String elemName = m_dtm.getNodeName(node); |
| String localName = m_dtm.getLocalName(node); |
| String namespace = m_dtm.getNamespaceURI(node); |
| |
| //xcntxt.pushCurrentNode(node); |
| // SAX-like call to allow adding attributes afterwards |
| m_handler.startElement(namespace, localName, elemName); |
| boolean hasNSDecls = false; |
| DTM dtm = m_dtm; |
| for (int ns = dtm.getFirstNamespaceNode(node, true); |
| DTM.NULL != ns; ns = dtm.getNextNamespaceNode(node, ns, true)) |
| { |
| SerializerUtils.ensureNamespaceDeclDeclared(m_handler,dtm, ns); |
| } |
| |
| |
| for (int attr = dtm.getFirstAttribute(node); |
| DTM.NULL != attr; attr = dtm.getNextAttribute(attr)) |
| { |
| SerializerUtils.addAttribute(m_handler, attr); |
| } |
| } |
| |
| } |
| else |
| { |
| xcntxt.pushCurrentNode(node); |
| super.startNode(node); |
| xcntxt.popCurrentNode(); |
| } |
| } |
| catch(javax.xml.transform.TransformerException te) |
| { |
| throw new org.xml.sax.SAXException(te); |
| } |
| } |
| } |