001 /**************************************************************** 002 * Licensed to the Apache Software Foundation (ASF) under one * 003 * or more contributor license agreements. See the NOTICE file * 004 * distributed with this work for additional information * 005 * regarding copyright ownership. The ASF licenses this file * 006 * to you under the Apache License, Version 2.0 (the * 007 * "License"); you may not use this file except in compliance * 008 * with the License. You may obtain a copy of the License at * 009 * * 010 * http://www.apache.org/licenses/LICENSE-2.0 * 011 * * 012 * Unless required by applicable law or agreed to in writing, * 013 * software distributed under the License is distributed on an * 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 015 * KIND, either express or implied. See the License for the * 016 * specific language governing permissions and limitations * 017 * under the License. * 018 ****************************************************************/ 019 020 package org.apache.james.jspf.wiring; 021 022 023 import java.lang.reflect.InvocationTargetException; 024 import java.lang.reflect.Method; 025 import java.util.Hashtable; 026 import java.util.Iterator; 027 028 /** 029 * This class associates "Enabling interfaces" to the service that provides the 030 * dependency. 031 */ 032 public class WiringServiceTable extends Hashtable<Class<?>,Object> implements WiringService { 033 034 private static final long serialVersionUID = -9151935136150279119L; 035 036 /** 037 * @see org.apache.james.jspf.wiring.WiringService#wire(java.lang.Object) 038 */ 039 public void wire(Object component) throws WiringServiceException { 040 Iterator<Class<?>> i = keySet().iterator(); 041 while (i.hasNext()) { 042 Class<?> enablingClass = i.next(); 043 if (enablingClass.isInstance(component)) { 044 Method[] m = enablingClass.getDeclaredMethods(); 045 if (m!=null && m.length == 1 && m[0] != null) { 046 try { 047 m[0].invoke(component, new Object[] {get(enablingClass)}); 048 } catch (IllegalArgumentException e) { 049 throw new WiringServiceException("Illegal argument invoking enabled service: "+enablingClass.toString(), e); 050 } catch (InvocationTargetException e) { 051 throw new WiringServiceException("Unable to invoke enabled service: "+enablingClass.toString(), e); 052 } catch (IllegalAccessException e) { 053 throw new WiringServiceException("Unable to invoke enabled service: "+enablingClass.toString(), e); 054 } 055 } 056 } 057 } 058 059 } 060 061 }