| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.catalina.storeconfig; |
| |
| import org.apache.tomcat.util.digester.Rule; |
| import org.xml.sax.Attributes; |
| |
| /** |
| * <p> |
| * Rule that creates a new <code>IStoreFactory</code> instance, and associates |
| * it with the top object on the stack (which must implement |
| * <code>IStoreFactory</code>). |
| * </p> |
| */ |
| |
| public class StoreFactoryRule extends Rule { |
| |
| // ----------------------------------------------------------- Constructors |
| |
| /** |
| * Construct a new instance of this Rule. |
| * |
| * @param storeFactoryClass |
| * Default name of the StoreFactory implementation class to be |
| * created |
| * @param attributeName |
| * Name of the attribute that optionally includes an override |
| * name of the IStoreFactory class |
| */ |
| public StoreFactoryRule(String storeFactoryClass, String attributeName, |
| String storeAppenderClass, String appenderAttributeName) { |
| |
| this.storeFactoryClass = storeFactoryClass; |
| this.attributeName = attributeName; |
| this.appenderAttributeName = appenderAttributeName; |
| this.storeAppenderClass = storeAppenderClass; |
| |
| } |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| /** |
| * The attribute name of an attribute that can override the implementation |
| * class name. |
| */ |
| private String attributeName; |
| |
| private String appenderAttributeName; |
| |
| /** |
| * The name of the <code>IStoreFactory</code> implementation class. |
| */ |
| private String storeFactoryClass; |
| |
| private String storeAppenderClass; |
| |
| // --------------------------------------------------------- Public Methods |
| |
| /** |
| * Handle the beginning of an XML element. |
| * |
| * @param attributes |
| * The attributes of this element |
| * |
| * @exception Exception |
| * if a processing error occurs |
| */ |
| @Override |
| public void begin(String namespace, String name, Attributes attributes) |
| throws Exception { |
| |
| IStoreFactory factory = (IStoreFactory) newInstance(attributeName, |
| storeFactoryClass, attributes); |
| StoreAppender storeAppender = (StoreAppender) newInstance( |
| appenderAttributeName, storeAppenderClass, attributes); |
| factory.setStoreAppender(storeAppender); |
| |
| // Add this StoreFactory to our associated component |
| StoreDescription desc = (StoreDescription) digester.peek(0); |
| StoreRegistry registry = (StoreRegistry) digester.peek(1); |
| factory.setRegistry(registry); |
| desc.setStoreFactory(factory); |
| |
| } |
| |
| /** |
| * create new instance from attribte className! |
| * |
| * @param attr class Name attribute |
| * @param defaultName Default Class |
| * @param attributes current digester attribute elements |
| * @return new config object instance |
| * @throws ClassNotFoundException |
| * @throws InstantiationException |
| * @throws IllegalAccessException |
| */ |
| protected Object newInstance(String attr, String defaultName, |
| Attributes attributes) throws ClassNotFoundException, |
| InstantiationException, IllegalAccessException { |
| String className = defaultName; |
| if (attr != null) { |
| String value = attributes.getValue(attr); |
| if (value != null) |
| className = value; |
| } |
| Class<?> clazz = Class.forName(className); |
| return clazz.newInstance(); |
| } |
| } |