| /* |
| * 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.Expression; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XString; |
| import org.apache.xpath.objects.XNumber; |
| import org.apache.xpath.objects.XRTreeFrag; |
| import org.apache.xpath.objects.XRTreeFragSelectWrapper; |
| import org.apache.xml.utils.QName; |
| import org.apache.xalan.trace.SelectionEvent; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.transformer.TransformerImpl; |
| |
| import org.apache.xalan.extensions.ExtensionsTable; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| |
| import org.apache.xalan.extensions.ExtensionNamespaceSupport; |
| import org.apache.xalan.extensions.ExtensionHandlerExsltFunction; |
| |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * Implement func:function. |
| */ |
| public class ElemExsltFunction extends ElemTemplate |
| { |
| |
| /** |
| * Get an integer representation of the element type. |
| * |
| * @return An integer representation of the element, defined in the |
| * Constants class. |
| * @see org.apache.xalan.templates.Constants |
| */ |
| public int getXSLToken() |
| { |
| return Constants.EXSLT_ELEMNAME_FUNCTION; |
| } |
| |
| /** |
| * Return the node name, defined in the |
| * Constants class. |
| * @see org.apache.xalan.templates.Constants. |
| * @return The node name |
| * |
| */ |
| public String getNodeName() |
| { |
| return Constants.EXSLT_ELEMNAME_FUNCTION_STRING; |
| } |
| |
| public void execute(TransformerImpl transformer, XObject[] args) |
| throws TransformerException |
| { |
| XPathContext xctxt = transformer.getXPathContext(); |
| VariableStack vars = xctxt.getVarStack(); |
| |
| // Set parameters. |
| NodeList children = this.getChildNodes(); |
| int numparams =0; |
| for (int i = 0; i < args.length; i ++) |
| { |
| Node child = children.item(i); |
| if (children.item(i) instanceof ElemParam) |
| { |
| numparams++; |
| ElemParam param = (ElemParam)children.item(i); |
| vars.setLocalVariable (param.m_index, args[i]); |
| } |
| } |
| if (numparams < args.length) |
| throw new TransformerException ("function called with too many args"); |
| |
| // Removed ElemTemplate 'push' and 'pop' of RTFContext, in order to avoid losing the RTF context |
| // before a value can be returned. ElemExsltFunction operates in the scope of the template that called |
| // the function. |
| // xctxt.pushRTFContext(); |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireTraceEvent(this); |
| |
| // Be sure the return value is not set (so can verify that only one result |
| // is generated per ElemExsltFunction execute). |
| vars.setLocalVariable(_resultIndex, null); |
| transformer.executeChildTemplates(this, true); |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireTraceEndEvent(this); |
| |
| // Following ElemTemplate 'pop' removed -- see above. |
| // xctxt.popRTFContext(); |
| |
| } |
| //int m_inArgsSize; |
| //public int m_frameSize; |
| |
| /** |
| * Called after everything else has been |
| * recomposed, and allows the function to set remaining |
| * values that may be based on some other property that |
| * depends on recomposition. Also adds a slot to the variable |
| * stack for the return value. The result element will place |
| * its value in this slot. |
| */ |
| public void compose(StylesheetRoot sroot) throws TransformerException |
| { |
| super.compose(sroot); |
| StylesheetRoot.ComposeState cstate = sroot.getComposeState(); |
| // Add a position on the variable stack for the return value. |
| setResultIndex(cstate.addVariableName |
| (new QName(Constants.S_EXSLT_COMMON_URL, "result"))); |
| |
| // Register the function namespace (if not already registered). |
| String namespace = getName().getNamespace(); |
| String handlerClass = "org.apache.xalan.extensions.ExtensionHandlerExsltFunction"; |
| Object[] args ={namespace, sroot}; |
| ExtensionNamespaceSupport extNsSpt = |
| new ExtensionNamespaceSupport(namespace, handlerClass, args); |
| sroot.getExtensionNamespacesManager().registerExtension(extNsSpt); |
| // Make sure there is a handler for the EXSLT functions namespace |
| // -- for isElementAvailable(). |
| if (!(namespace.equals(Constants.S_EXSLT_FUNCTIONS_URL))) |
| { |
| namespace = Constants.S_EXSLT_FUNCTIONS_URL; |
| args = new Object[]{namespace, sroot}; |
| extNsSpt = new ExtensionNamespaceSupport(namespace, handlerClass, args); |
| sroot.getExtensionNamespacesManager().registerExtension(extNsSpt); |
| } |
| } |
| |
| /** |
| * Add the namespace to the StylesheetRoot vector of extension namespaces. Be sure the |
| * exslt:function namespace is also added. |
| */ |
| /* public void runtimeInit(TransformerImpl transformer) throws TransformerException |
| { |
| //System.out.println("ElemExsltFunction.runtimeInit()"); |
| String namespace = getName().getNamespace(); |
| ExtensionsTable etable = transformer.getExtensionsTable(); |
| StylesheetRoot sroot = transformer.getStylesheet(); |
| ExtensionHandlerExsltFunction exsltHandler = |
| new ExtensionHandlerExsltFunction(namespace, sroot); |
| //etable.addExtensionNamespace(namespace, exsltHandler); |
| // Make sure there is a handler for the EXSLT functions namespace |
| // -- for isElementAvailable(). |
| if (!(namespace.equals(Constants.S_EXSLT_FUNCTIONS_URL))) |
| { |
| exsltHandler = new ExtensionHandlerExsltFunction( |
| Constants.S_EXSLT_FUNCTIONS_URL, |
| sroot); |
| // etable.addExtensionNamespace(Constants.S_EXSLT_FUNCTIONS_URL, |
| // exsltHandler); |
| } |
| } |
| */ |
| |
| private int _resultIndex; |
| |
| /** |
| * Sets aside a position on the local variable stack index |
| * to refer to the result element return value. |
| */ |
| void setResultIndex(int stackIndex) |
| { |
| _resultIndex = stackIndex; |
| } |
| |
| /** |
| * Provides the EXSLT extension handler access to the return value. |
| */ |
| public int getResultIndex() |
| { |
| return _resultIndex; |
| } |
| |
| } |