| /* |
| * 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.extensions; |
| |
| import java.util.Hashtable; |
| |
| /** |
| * <meta name="usage" content="internal"/> |
| * Abstract base class handling the java language extensions for XPath. |
| * This base class provides cache management shared by all of the |
| * various java extension handlers. |
| * |
| */ |
| public abstract class ExtensionHandlerJava extends ExtensionHandler |
| { |
| |
| /** Extension class name */ |
| protected String m_className = ""; |
| |
| /** Table of cached methods */ |
| private Hashtable m_cachedMethods = new Hashtable(); |
| |
| /** |
| * Construct a new extension handler given all the information |
| * needed. |
| * |
| * @param namespaceUri the extension namespace URI that I'm implementing |
| * @param funcNames string containing list of functions of extension NS |
| * @param lang language of code implementing the extension |
| * @param srcURL value of src attribute (if any) - treated as a URL |
| * or a classname depending on the value of lang. If |
| * srcURL is not null, then scriptSrc is ignored. |
| * @param scriptSrc the actual script code (if any) |
| * @param scriptLang the scripting language |
| * @param className the extension class name |
| */ |
| protected ExtensionHandlerJava(String namespaceUri, String scriptLang, |
| String className) |
| { |
| |
| super(namespaceUri, scriptLang); |
| |
| m_className = className; |
| } |
| |
| /** |
| * Look up the entry in the method cache. |
| * @param methodKey A key that uniquely identifies this invocation in |
| * the stylesheet. |
| * @param objType A Class object or instance object representing the type |
| * @param methodArgs An array of the XObject arguments to be used for |
| * function mangling. |
| * |
| * @return The given method from the method cache |
| */ |
| public Object getFromCache(Object methodKey, Object objType, |
| Object[] methodArgs) |
| { |
| |
| // Eventually, we want to insert code to mangle the methodKey with methodArgs |
| return m_cachedMethods.get(methodKey); |
| } |
| |
| /** |
| * Add a new entry into the method cache. |
| * @param methodKey A key that uniquely identifies this invocation in |
| * the stylesheet. |
| * @param objType A Class object or instance object representing the type |
| * @param methodArgs An array of the XObject arguments to be used for |
| * function mangling. |
| * @param methodObj A Class object or instance object representing the method |
| * |
| * @return The cached method object |
| */ |
| public Object putToCache(Object methodKey, Object objType, |
| Object[] methodArgs, Object methodObj) |
| { |
| |
| // Eventually, we want to insert code to mangle the methodKey with methodArgs |
| return m_cachedMethods.put(methodKey, methodObj); |
| } |
| } |