19f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 29f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 39f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * or more contributor license agreements. See the NOTICE file 49f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed with this work for additional information 59f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * regarding copyright ownership. The ASF licenses this file 69f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 79f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * you may not use this file except in compliance with the License. 89f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * You may obtain a copy of the License at 99f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Unless required by applicable law or agreed to in writing, software 139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * See the License for the specific language governing permissions and 169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * limitations under the License. 179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * $Id: ElemExsltFunction.java 468643 2006-10-28 06:56:03Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xalan.templates; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport javax.xml.transform.TransformerException; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xalan.extensions.ExtensionNamespaceSupport; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xalan.transformer.TransformerImpl; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.VariableStack; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XObject; 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.w3c.dom.Node; 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.w3c.dom.NodeList; 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Implement func:function. 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @xsl.usage advanced 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class ElemExsltFunction extends ElemTemplate 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = 272154954793534771L; 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get an integer representation of the element type. 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return An integer representation of the element, defined in the 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Constants class. 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see org.apache.xalan.templates.Constants 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getXSLToken() 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCTION; 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Return the node name, defined in the 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Constants class. 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see org.apache.xalan.templates.Constants 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return The node name 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNodeName() 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCTION_STRING; 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void execute(TransformerImpl transformer, XObject[] args) 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws TransformerException 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathContext xctxt = transformer.getXPathContext(); 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson VariableStack vars = xctxt.getVarStack(); 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Increment the frame bottom of the variable stack by the 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // frame size 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int thisFrame = vars.getStackFrame(); 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int nextFrame = vars.link(m_frameSize); 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (m_inArgsSize < args.length) { 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throw new TransformerException ("function called with too many args"); 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Set parameters, 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // have to clear the section of the stack frame that has params. 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (m_inArgsSize > 0) { 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.clearLocalSlots(0, m_inArgsSize); 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (args.length > 0) { 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setStackFrame(thisFrame); 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson NodeList children = this.getChildNodes(); 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson for (int i = 0; i < args.length; i ++) { 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Node child = children.item(i); 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (children.item(i) instanceof ElemParam) { 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson ElemParam param = (ElemParam)children.item(i); 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setLocalVariable(param.getIndex(), args[i], nextFrame); 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setStackFrame(nextFrame); 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Removed ElemTemplate 'push' and 'pop' of RTFContext, in order to avoid losing the RTF context 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // before a value can be returned. ElemExsltFunction operates in the scope of the template that called 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // the function. 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // xctxt.pushRTFContext(); 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setStackFrame(nextFrame); 1089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson transformer.executeChildTemplates(this, true); 1099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Reset the stack frame after the function call 1119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.unlink(thisFrame); 1129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Following ElemTemplate 'pop' removed -- see above. 1149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // xctxt.popRTFContext(); 1159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Called after everything else has been 1209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * recomposed, and allows the function to set remaining 1219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * values that may be based on some other property that 1229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * depends on recomposition. 1239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void compose(StylesheetRoot sroot) throws TransformerException 1259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.compose(sroot); 1279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Register the function namespace (if not already registered). 1299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String namespace = getName().getNamespace(); 1309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String handlerClass = sroot.getExtensionHandlerClass(); 1319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Object[] args ={namespace, sroot}; 1329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson ExtensionNamespaceSupport extNsSpt = 1339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson new ExtensionNamespaceSupport(namespace, handlerClass, args); 1349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson sroot.getExtensionNamespacesManager().registerExtension(extNsSpt); 1359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Make sure there is a handler for the EXSLT functions namespace 1369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // -- for isElementAvailable(). 1379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (!(namespace.equals(Constants.S_EXSLT_FUNCTIONS_URL))) 1389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson namespace = Constants.S_EXSLT_FUNCTIONS_URL; 1409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson args = new Object[]{namespace, sroot}; 1419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson extNsSpt = new ExtensionNamespaceSupport(namespace, handlerClass, args); 1429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson sroot.getExtensionNamespacesManager().registerExtension(extNsSpt); 1439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 146