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: ExtensionNamespaceSupport.java 468637 2006-10-28 06:51:02Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xalan.extensions; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport java.lang.reflect.Constructor; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport javax.xml.transform.TransformerException; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * During styleseet composition, an ExtensionNamespaceSupport object is created for each extension 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * namespace the stylesheet uses. At the beginning of a transformation, TransformerImpl generates 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * an ExtensionHandler for each of these objects and adds an entry to the ExtensionsTable hashtable. 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class ExtensionNamespaceSupport 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Namespace, ExtensionHandler class name, constructor signature 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // and arguments. 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String m_namespace = null; 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String m_handlerClass = null; 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Class [] m_sig = null; 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Object [] m_args = null; 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public ExtensionNamespaceSupport(String namespace, 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String handlerClass, 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Object[] constructorArgs) 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_namespace = namespace; 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_handlerClass = handlerClass; 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_args = constructorArgs; 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Create the constructor signature. 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_sig = new Class[m_args.length]; 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson for (int i = 0; i < m_args.length; i++) 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (m_args[i] != null) 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_sig[i] = m_args[i].getClass();//System.out.println("arg class " + i + " " +m_sig[i]); 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else // If an arguments is null, pick the constructor later. 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_sig = null; 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson break; 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNamespace() 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_namespace; 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Launch the ExtensionHandler that this ExtensionNamespaceSupport object defines. 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public ExtensionHandler launch() 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws TransformerException 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson ExtensionHandler handler = null; 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson try 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Class cl = ExtensionHandler.getClassForName(m_handlerClass); 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Constructor con = null; 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson //System.out.println("class " + cl + " " + m_args + " " + m_args.length + " " + m_sig); 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (m_sig != null) 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson con = cl.getConstructor(m_sig); 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else // Pick the constructor based on number of args. 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Constructor[] cons = cl.getConstructors(); 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson for (int i = 0; i < cons.length; i ++) 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (cons[i].getParameterTypes().length == m_args.length) 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson con = cons[i]; 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson break; 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // System.out.println("constructor " + con); 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (con != null) 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson handler = (ExtensionHandler)con.newInstance(m_args); 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throw new TransformerException("ExtensionHandler constructor not found"); 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson catch (Exception e) 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throw new TransformerException(e); 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return handler; 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 107