Source Code Cross Referenced for SpringWebApplication.java in  » J2EE » wicket » wicket » spring » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » wicket » wicket.spring 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: SpringWebApplication.java 459061 2006-02-08 18:25:54Z ivaynberg $
003:         * $Revision: 459061 $
004:         * $Date: 2006-02-08 19:25:54 +0100 (Wed, 08 Feb 2006) $
005:         * 
006:         * ==============================================================================
007:         * Licensed under the Apache License, Version 2.0 (the "License"); you may not
008:         * use this file except in compliance with the License. You may obtain a copy of
009:         * the License at
010:         * 
011:         * http://www.apache.org/licenses/LICENSE-2.0
012:         * 
013:         * Unless required by applicable law or agreed to in writing, software
014:         * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
015:         * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
016:         * License for the specific language governing permissions and limitations under
017:         * the License.
018:         */
019:        package wicket.spring;
020:
021:        import javax.servlet.ServletContext;
022:
023:        import org.springframework.beans.BeansException;
024:        import org.springframework.context.ApplicationContext;
025:        import org.springframework.context.ApplicationContextAware;
026:        import org.springframework.web.context.support.WebApplicationContextUtils;
027:
028:        import wicket.Application;
029:        import wicket.protocol.http.WebApplication;
030:        import wicket.proxy.LazyInitProxyFactory;
031:
032:        /**
033:         * Base class for spring aware wicket web application object. This class has
034:         * helper methods to create lazy init proxies based on spring beans, as well as
035:         * an implementation of {@link ISpringContextLocator}.
036:         * 
037:         * @author Igor Vaynberg (ivaynberg)
038:         */
039:        public abstract class SpringWebApplication extends WebApplication
040:                implements  ApplicationContextAware {
041:            private ApplicationContext applicationContext;
042:
043:            /**
044:             * Singleton instance of spring application context locator
045:             */
046:            private final static ISpringContextLocator contextLocator = new ISpringContextLocator() {
047:
048:                public ApplicationContext getSpringContext() {
049:                    Application app = Application.get();
050:                    return ((SpringWebApplication) app)
051:                            .internalGetApplicationContext();
052:                }
053:            };
054:
055:            /**
056:             * Construct.
057:             */
058:            public SpringWebApplication() {
059:
060:            }
061:
062:            /**
063:             * @see wicket.Application#internalInit()
064:             */
065:            protected void internalInit() {
066:                super .internalInit();
067:
068:                if (applicationContext == null) {
069:                    // this application was not created as a spring bean so we
070:                    // locate the app context from servlet context
071:
072:                    ServletContext sc = getWicketServlet().getServletContext();
073:                    applicationContext = WebApplicationContextUtils
074:                            .getRequiredWebApplicationContext(sc);
075:
076:                }
077:            }
078:
079:            /**
080:             * @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.ApplicationContext)
081:             */
082:            public final void setApplicationContext(
083:                    ApplicationContext applicationContext)
084:                    throws BeansException {
085:                this .applicationContext = applicationContext;
086:            }
087:
088:            /**
089:             * Retrieves the spring application context associated with this application
090:             * object
091:             * 
092:             * This method is protected and named internalGetApplicationContext so that
093:             * the subclass can choose whether or not to add a public
094:             * getApplicationContext() method
095:             * 
096:             * @return spring application context
097:             */
098:            protected final ApplicationContext internalGetApplicationContext() {
099:                return applicationContext;
100:            }
101:
102:            /**
103:             * Retrieves the spring application context locator object
104:             * 
105:             * @return spring application context locator object
106:             */
107:            public ISpringContextLocator getSpringContextLocator() {
108:                return contextLocator;
109:            }
110:
111:            /**
112:             * Creates a proxy for a spring bean that is safe to put into session and
113:             * serialize
114:             * 
115:             * @param clazz
116:             *            class of spring bean
117:             * @param beanName
118:             *            name of spring bean
119:             * @return proxy representing the spring bean
120:             */
121:            protected Object createSpringBeanProxy(Class clazz, String beanName) {
122:                return LazyInitProxyFactory.createProxy(clazz,
123:                        new SpringBeanLocator(beanName, clazz,
124:                                getSpringContextLocator()));
125:            }
126:
127:            /**
128:             * Creates a proxy for a spring bean that is safe to put into session and
129:             * serialize
130:             * 
131:             * @param clazz
132:             *            class of spring bean
133:             * @return proxy representing the spring bean
134:             */
135:            protected Object createSpringBeanProxy(Class clazz) {
136:                return LazyInitProxyFactory
137:                        .createProxy(clazz, new SpringBeanLocator(clazz,
138:                                getSpringContextLocator()));
139:            }
140:
141:        }
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