- /*
- * 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;
- }
-
- }