Java tutorial
/* * Copyright 2008-2010 the original author or authors. * * Licensed 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.synyx.hades.extensions.beans; import java.io.Serializable; import java.util.Collection; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import org.springframework.beans.PropertyEditorRegistrar; import org.springframework.beans.PropertyEditorRegistry; import org.springframework.beans.factory.BeanFactoryUtils; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.synyx.hades.dao.GenericDao; import org.synyx.hades.util.ClassUtils; /** * Simple helper class to use Hades DAOs to provide * {@link java.beans.PropertyEditor}s for domain classes. To get this working * configure a * {@link org.springframework.web.bind.support.ConfigurableWebBindingInitializer} * for your * {@link org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter} * and register the {@link GenericDaoPropertyEditorRegistrar} there: <code> * <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> * <property name="webBindingInitializer"> * <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer"> * <property name="propertyEditorRegistrars"> * <bean class="org.synyx.hades.extensions.beans.GenericDaoPropertyEditorRegistrar" /> * </property> * </bean> * </property> * </bean> * </code> * * @author Oliver Gierke */ public class GenericDaoPropertyEditorRegistrar implements PropertyEditorRegistrar, ApplicationContextAware { private final Map<Class<?>, GenericDao<?, Serializable>> daoMap = new HashMap<Class<?>, GenericDao<?, Serializable>>(); /* * (non-Javadoc) * * @see * org.springframework.beans.PropertyEditorRegistrar#registerCustomEditors * (org.springframework.beans.PropertyEditorRegistry) */ public void registerCustomEditors(PropertyEditorRegistry registry) { for (Entry<Class<?>, GenericDao<?, Serializable>> entry : daoMap.entrySet()) { registry.registerCustomEditor(entry.getKey(), new DomainClassPropertyEditor<Serializable>(entry.getValue(), registry)); } } /* * (non-Javadoc) * * @see * org.springframework.context.ApplicationContextAware#setApplicationContext * (org.springframework.context.ApplicationContext) */ @SuppressWarnings("unchecked") public void setApplicationContext(ApplicationContext context) { @SuppressWarnings("rawtypes") Collection<GenericDao> daos = BeanFactoryUtils.beansOfTypeIncludingAncestors(context, GenericDao.class) .values(); for (GenericDao<?, ?> dao : daos) { this.daoMap.put(getDomainClass(dao), (GenericDao<?, Serializable>) dao); } } /** * Derives the domain class from the given DAO class. * * @param dao * @return */ private Class<?> getDomainClass(GenericDao<?, ?> dao) { return ClassUtils.getDomainClass(dao.getClass()); } }