| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xalan.templates; |
| |
| //import org.w3c.dom.*; |
| import org.apache.xml.dtm.DTM; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xpath.*; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xalan.trace.SelectionEvent; |
| import org.apache.xml.utils.QName; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.transformer.TransformerImpl; |
| |
| import javax.xml.transform.TransformerException; |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * Implement xsl:choose. |
| * <pre> |
| * <!ELEMENT xsl:choose (xsl:when+, xsl:otherwise?)> |
| * <!ATTLIST xsl:choose %space-att;> |
| * </pre> |
| * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:choose">XXX in XSLT Specification</a> |
| */ |
| public class ElemChoose extends ElemTemplateElement |
| { |
| |
| /** |
| * 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_CHOOSE; |
| } |
| |
| /** |
| * Return the node name. |
| * |
| * @return The element's name |
| */ |
| public String getNodeName() |
| { |
| return Constants.ELEMNAME_CHOOSE_STRING; |
| } |
| |
| /** |
| * Constructor ElemChoose |
| * |
| */ |
| public ElemChoose(){} |
| |
| /** |
| * Execute the xsl:choose transformation. |
| * |
| * |
| * @param transformer non-null reference to the the current transform-time state. |
| * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>. |
| * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>. |
| * |
| * @throws TransformerException |
| */ |
| public void execute(TransformerImpl transformer) throws TransformerException |
| { |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireTraceEvent(this); |
| |
| boolean found = false; |
| |
| for (ElemTemplateElement childElem = getFirstChildElem(); |
| childElem != null; childElem = childElem.getNextSiblingElem()) |
| { |
| int type = childElem.getXSLToken(); |
| |
| if (Constants.ELEMNAME_WHEN == type) |
| { |
| found = true; |
| |
| ElemWhen when = (ElemWhen) childElem; |
| |
| // must be xsl:when |
| XPathContext xctxt = transformer.getXPathContext(); |
| int sourceNode = xctxt.getCurrentNode(); |
| |
| if (TransformerImpl.S_DEBUG) |
| { |
| XObject test = when.getTest().execute(xctxt, sourceNode, when); |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireSelectedEvent(sourceNode, when, |
| "test", when.getTest(), test); |
| |
| if (test.bool()) |
| { |
| transformer.getTraceManager().fireTraceEvent(when); |
| transformer.executeChildTemplates(when, true); |
| |
| return; |
| } |
| |
| } |
| else if (when.getTest().bool(xctxt, sourceNode, when)) |
| { |
| transformer.executeChildTemplates(when, true); |
| |
| return; |
| } |
| } |
| else if (Constants.ELEMNAME_OTHERWISE == type) |
| { |
| found = true; |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireTraceEvent(childElem); |
| |
| // xsl:otherwise |
| transformer.executeChildTemplates(childElem, true); |
| |
| return; |
| } |
| } |
| |
| if (!found) |
| transformer.getMsgMgr().error( |
| this, XSLTErrorResources.ER_CHOOSE_REQUIRES_WHEN); |
| } |
| |
| /** |
| * Add a child to the child list. |
| * |
| * @param newChild Child to add to this node's child list |
| * |
| * @return The child that was just added to the child list |
| * |
| * @throws DOMException |
| */ |
| public ElemTemplateElement appendChild(ElemTemplateElement newChild) |
| { |
| |
| int type = ((ElemTemplateElement) newChild).getXSLToken(); |
| |
| switch (type) |
| { |
| case Constants.ELEMNAME_WHEN : |
| case Constants.ELEMNAME_OTHERWISE : |
| |
| // TODO: Positional checking |
| break; |
| default : |
| error(XSLTErrorResources.ER_CANNOT_ADD, |
| new Object[]{ newChild.getNodeName(), |
| this.getNodeName() }); //"Can not add " +((ElemTemplateElement)newChild).m_elemName + |
| |
| //" to " + this.m_elemName); |
| } |
| |
| return super.appendChild(newChild); |
| } |
| } |