Source Code Cross Referenced for ModuleConfigFactory.java in  » Web-Framework » struts-1.3.8 » org » apache » struts » config » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » struts 1.3.8 » org.apache.struts.config 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: ModuleConfigFactory.java 471754 2006-11-06 14:55:09Z husted $
003:         *
004:         * Licensed to the Apache Software Foundation (ASF) under one
005:         * or more contributor license agreements.  See the NOTICE file
006:         * distributed with this work for additional information
007:         * regarding copyright ownership.  The ASF licenses this file
008:         * to you under the Apache License, Version 2.0 (the
009:         * "License"); you may not use this file except in compliance
010:         * with the License.  You may obtain a copy of the License at
011:         *
012:         *  http://www.apache.org/licenses/LICENSE-2.0
013:         *
014:         * Unless required by applicable law or agreed to in writing,
015:         * software distributed under the License is distributed on an
016:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017:         * KIND, either express or implied.  See the License for the
018:         * specific language governing permissions and limitations
019:         * under the License.
020:         */
021:        package org.apache.struts.config;
022:
023:        import org.apache.commons.logging.Log;
024:        import org.apache.commons.logging.LogFactory;
025:        import org.apache.struts.util.RequestUtils;
026:
027:        /**
028:         * A factory interface for creating {@link ModuleConfig}s.
029:         *
030:         * @version $Rev: 471754 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
031:         *          $
032:         * @see ModuleConfig
033:         */
034:        public abstract class ModuleConfigFactory {
035:            /**
036:             * The Java class to be used for <code>ModuleConfigFactory</code>
037:             * instances.
038:             */
039:            protected static Class clazz = null;
040:
041:            /**
042:             * Commons Logging instance.
043:             */
044:            private static final Log LOG = LogFactory
045:                    .getLog(ModuleConfigFactory.class);
046:
047:            /**
048:             * The fully qualified class name to be used for <code>ModuleConfigFactory</code>
049:             * instances.
050:             */
051:            protected static String factoryClass = "org.apache.struts.config.impl.DefaultModuleConfigFactory";
052:
053:            /**
054:             * Create and return a newly instansiated {@link ModuleConfig}. This
055:             * method must be implemented by concrete subclasses.
056:             *
057:             * @param prefix Module prefix for Configuration
058:             */
059:            public abstract ModuleConfig createModuleConfig(String prefix);
060:
061:            // ------------------------------------------------------ Static Properties
062:
063:            /**
064:             * The fully qualified class name that is used for <code>ModuleConfigFactory</code>
065:             * instances.
066:             *
067:             * @return class name that is used for <code>ModuleConfigFactory</code>
068:             *         instances
069:             */
070:            public static String getFactoryClass() {
071:                return (ModuleConfigFactory.factoryClass);
072:            }
073:
074:            /**
075:             * Set the fully qualified class name that is used for
076:             * <code>ModuleConfigFactory</code> instances.
077:             *
078:             * @param factoryClass name that is used for <code>ModuleConfigFactory</code>
079:             *                     instances
080:             */
081:            public static void setFactoryClass(String factoryClass) {
082:                ModuleConfigFactory.factoryClass = factoryClass;
083:                ModuleConfigFactory.clazz = null;
084:            }
085:
086:            // --------------------------------------------------------- Static Methods
087:
088:            /**
089:             * Create and return a <code>ModuleConfigFactory</code> instance of the
090:             * appropriate class, which can be used to create customized
091:             * <code>ModuleConfig</code> instances.  If no such factory can be
092:             * created, return <code>null</code> instead.
093:             */
094:            public static ModuleConfigFactory createFactory() {
095:                ModuleConfigFactory factory = null;
096:
097:                try {
098:                    if (clazz == null) {
099:                        clazz = RequestUtils.applicationClass(factoryClass);
100:                    }
101:
102:                    factory = (ModuleConfigFactory) clazz.newInstance();
103:                } catch (ClassNotFoundException e) {
104:                    LOG.error("ModuleConfigFactory.createFactory()", e);
105:                } catch (InstantiationException e) {
106:                    LOG.error("ModuleConfigFactory.createFactory()", e);
107:                } catch (IllegalAccessException e) {
108:                    LOG.error("ModuleConfigFactory.createFactory()", e);
109:                }
110:
111:                return factory;
112:            }
113:        }
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