| /* |
| * 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: ElemCopyOf.java 468643 2006-10-28 06:56:03Z minchau $ |
| */ |
| package org.apache.xalan.templates; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.transformer.TransformerImpl; |
| import org.apache.xalan.transformer.TreeWalker2Result; |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.dtm.ref.DTMTreeWalker; |
| import org.apache.xalan.serialize.SerializerUtils; |
| import org.apache.xml.serializer.SerializationHandler; |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.objects.XObject; |
| |
| /** |
| * Implement xsl:copy-of. |
| * <pre> |
| * <!ELEMENT xsl:copy-of EMPTY> |
| * <!ATTLIST xsl:copy-of select %expr; #REQUIRED> |
| * </pre> |
| * @see <a href="http://www.w3.org/TR/xslt#copy-of">copy-of in XSLT Specification</a> |
| * @xsl.usage advanced |
| */ |
| public class ElemCopyOf extends ElemTemplateElement |
| { |
| static final long serialVersionUID = -7433828829497411127L; |
| |
| /** |
| * The required select attribute contains an expression. |
| * @serial |
| */ |
| public XPath m_selectExpression = null; |
| |
| /** |
| * Set the "select" attribute. |
| * The required select attribute contains an expression. |
| * |
| * @param expr Expression for select attribute |
| */ |
| public void setSelect(XPath expr) |
| { |
| m_selectExpression = expr; |
| } |
| |
| /** |
| * Get the "select" attribute. |
| * The required select attribute contains an expression. |
| * |
| * @return Expression for select attribute |
| */ |
| public XPath getSelect() |
| { |
| return m_selectExpression; |
| } |
| |
| /** |
| * This function is called after everything else has been |
| * recomposed, and allows the template to set remaining |
| * values that may be based on some other property that |
| * depends on recomposition. |
| */ |
| public void compose(StylesheetRoot sroot) throws TransformerException |
| { |
| super.compose(sroot); |
| |
| StylesheetRoot.ComposeState cstate = sroot.getComposeState(); |
| m_selectExpression.fixupVariables(cstate.getVariableNames(), cstate.getGlobalsSize()); |
| } |
| |
| /** |
| * Get an int constant identifying the type of element. |
| * @see org.apache.xalan.templates.Constants |
| * |
| * @return The token ID for this element |
| */ |
| public int getXSLToken() |
| { |
| return Constants.ELEMNAME_COPY_OF; |
| } |
| |
| /** |
| * Return the node name. |
| * |
| * @return The element's name |
| */ |
| public String getNodeName() |
| { |
| return Constants.ELEMNAME_COPY_OF_STRING; |
| } |
| |
| /** |
| * The xsl:copy-of element can be used to insert a result tree |
| * fragment into the result tree, without first converting it to |
| * a string as xsl:value-of does (see [7.6.1 Generating Text with |
| * xsl:value-of]). |
| * |
| * @param transformer non-null reference to the the current transform-time state. |
| * |
| * @throws TransformerException |
| */ |
| public void execute( |
| TransformerImpl transformer) |
| throws TransformerException |
| { |
| try |
| { |
| XPathContext xctxt = transformer.getXPathContext(); |
| int sourceNode = xctxt.getCurrentNode(); |
| XObject value = m_selectExpression.execute(xctxt, sourceNode, this); |
| |
| SerializationHandler handler = transformer.getSerializationHandler(); |
| |
| if (null != value) |
| { |
| int type = value.getType(); |
| String s; |
| |
| switch (type) |
| { |
| case XObject.CLASS_BOOLEAN : |
| case XObject.CLASS_NUMBER : |
| case XObject.CLASS_STRING : |
| s = value.str(); |
| |
| handler.characters(s.toCharArray(), 0, s.length()); |
| break; |
| case XObject.CLASS_NODESET : |
| |
| // System.out.println(value); |
| DTMIterator nl = value.iter(); |
| |
| // Copy the tree. |
| DTMTreeWalker tw = new TreeWalker2Result(transformer, handler); |
| int pos; |
| |
| while (DTM.NULL != (pos = nl.nextNode())) |
| { |
| DTM dtm = xctxt.getDTMManager().getDTM(pos); |
| short t = dtm.getNodeType(pos); |
| |
| // If we just copy the whole document, a startDoc and endDoc get |
| // generated, so we need to only walk the child nodes. |
| if (t == DTM.DOCUMENT_NODE) |
| { |
| for (int child = dtm.getFirstChild(pos); child != DTM.NULL; |
| child = dtm.getNextSibling(child)) |
| { |
| tw.traverse(child); |
| } |
| } |
| else if (t == DTM.ATTRIBUTE_NODE) |
| { |
| SerializerUtils.addAttribute(handler, pos); |
| } |
| else |
| { |
| tw.traverse(pos); |
| } |
| } |
| // nl.detach(); |
| break; |
| case XObject.CLASS_RTREEFRAG : |
| SerializerUtils.outputResultTreeFragment( |
| handler, value, transformer.getXPathContext()); |
| break; |
| default : |
| |
| s = value.str(); |
| |
| handler.characters(s.toCharArray(), 0, s.length()); |
| break; |
| } |
| } |
| |
| // I don't think we want this. -sb |
| // if (transformer.getDebug()) |
| // transformer.getTraceManager().fireSelectedEvent(sourceNode, this, |
| // "endSelect", m_selectExpression, value); |
| |
| } |
| catch(org.xml.sax.SAXException se) |
| { |
| throw new TransformerException(se); |
| } |
| |
| } |
| |
| /** |
| * Add a child to the child list. |
| * |
| * @param newChild Child to add to this node's child list |
| * |
| * @return Child just added to child list |
| */ |
| public ElemTemplateElement appendChild(ElemTemplateElement newChild) |
| { |
| |
| error(XSLTErrorResources.ER_CANNOT_ADD, |
| new Object[]{ newChild.getNodeName(), |
| this.getNodeName() }); //"Can not add " +((ElemTemplateElement)newChild).m_elemName + |
| |
| //" to " + this.m_elemName); |
| return null; |
| } |
| |
| /** |
| * Call the children visitors. |
| * @param visitor The visitor whose appropriate method will be called. |
| */ |
| protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs) |
| { |
| if(callAttrs) |
| m_selectExpression.getExpression().callVisitors(m_selectExpression, visitor); |
| super.callChildVisitors(visitor, callAttrs); |
| } |
| |
| } |