109 lines
4.1 KiB
Java
109 lines
4.1 KiB
Java
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package netscape.ldap;
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import java.lang.reflect.*;
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import java.util.Hashtable;
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/**
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* Utility class to dynamically find methods of a class and to invoke
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* them
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*/
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class DynamicInvoker {
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static Object invokeMethod(Object obj, String packageName,
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String methodName, Object[] args, String[] argNames)
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throws LDAPException {
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try {
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java.lang.reflect.Method m = getMethod(packageName, methodName,
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argNames);
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if (m != null) {
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return (m.invoke(obj, args));
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}
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} catch (Exception e) {
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throw new LDAPException("Invoking "+methodName+": "+
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e.toString(), LDAPException.PARAM_ERROR);
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}
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return null;
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}
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static java.lang.reflect.Method getMethod(String packageName,
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String methodName, String[] args) throws LDAPException {
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try {
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java.lang.reflect.Method method = null;
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String suffix = "";
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if (args != null)
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for (int i=0; i<args.length; i++)
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suffix = suffix+args[i].getClass().getName();
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String key = packageName+"."+methodName+"."+suffix;
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if ((method = (java.lang.reflect.Method)(m_methodLookup.get(key)))
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!= null)
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return method;
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Class c = Class.forName(packageName);
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java.lang.reflect.Method[] m = c.getMethods();
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for (int i = 0; i < m.length; i++ ) {
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Class[] params = m[i].getParameterTypes();
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if ((m[i].getName().equals(methodName)) &&
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signatureCorrect(params, args)) {
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m_methodLookup.put(key, m[i]);
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return m[i];
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}
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}
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throw new LDAPException("Method " + methodName + " not found in " +
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packageName);
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} catch (ClassNotFoundException e) {
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throw new LDAPException("Class "+ packageName + " not found");
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}
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}
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static private boolean signatureCorrect(Class params[], String args[]) {
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if (args == null)
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return true;
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if (params.length != args.length)
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return false;
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for (int i=0; i<params.length; i++) {
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if (!params[i].getName().equals(args[i]))
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return false;
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}
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return true;
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}
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private static Hashtable m_methodLookup = new Hashtable();
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}
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