/* Copyright 2009 The Revere Group
*
* 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.chinasb.framework.core.base.dao.hibernate.original;
import java.io.Serializable;
import java.util.List;
import org.hibernate.NonUniqueResultException;
import org.chinasb.framework.core.base.dao.BaseDAODispatcher;
import org.chinasb.framework.core.base.dao.DAODispatcherException;
import org.chinasb.framework.core.base.search.ExampleOptions;
import org.chinasb.framework.core.base.search.Filter;
import org.chinasb.framework.core.base.search.ISearch;
import org.chinasb.framework.core.base.search.SearchResult;
/**
* <p>This is an implementation of GeneralDAO that delegates to other DAOs
* depending on what entity class is being processed.
*
* <p>Set the specificDAOs Map in order to configure which DAO will be used
* for which entity class. If the map contains no entry for a given class,
* the generalDAO is used.
*
* <p>For example to dispatch operation on com.myproject.model.Customer to a DAO called customerDAO,
* set the map like this. (Of course tools like Spring can be used to do this
* configuration more elequently.)
* <pre>
* Map<String,Object> specificDAOs = new HashMap<String,Object>();
* specificDAOs.put("com.myproject.model.Customer", customerDAO);
*
* DAODispatcher dispatcher = new DAODispatcher();
* dispatcher.setSpecificDAOs(specificDAOs);
* </pre>
*
* @author dwolverton
*
*/
@SuppressWarnings("unchecked")
public class DAODispatcher extends BaseDAODispatcher implements GeneralDAO {
protected GeneralDAO generalDAO;
/**
* GeneralDAO has default implementations for the standard DAO methods.
* Which model class it uses is specified when calling the particular
* method.
*/
public void setGeneralDAO(GeneralDAO generalDAO) {
this.generalDAO = generalDAO;
}
public void create(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
((GenericDAO) specificDAO).create(object);
} else {
callMethod(specificDAO, "create", object);
}
} else {
generalDAO.create(object);
}
}
public boolean createOrUpdate(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).createOrUpdate(object);
} else {
return (Boolean) callMethod(specificDAO, "createOrUpdate", object);
}
} else {
return generalDAO.createOrUpdate(object);
}
}
public boolean deleteById(Class<?> klass, Serializable id) {
Object specificDAO = getSpecificDAO(klass.getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).deleteById(id);
} else {
return (Boolean) callMethod(specificDAO, "deleteById", id);
}
} else {
return generalDAO.deleteById(klass, id);
}
}
public boolean deleteEntity(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).deleteEntity(object);
} else {
return (Boolean) callMethod(specificDAO, "deleteEntity", object);
}
} else {
return generalDAO.deleteEntity(object);
}
}
public <T> T fetch(Class<T> klass, Serializable id) {
Object specificDAO = getSpecificDAO(klass.getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return (T) ((GenericDAO) specificDAO).fetch(id);
} else {
return (T) callMethod(specificDAO, "fetch", id);
}
} else {
return generalDAO.fetch(klass, id);
}
}
public <T> List<T> fetchAll(Class<T> klass) {
Object specificDAO = getSpecificDAO(klass.getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).fetchAll();
} else {
return (List<T>) callMethod(specificDAO, "fetchAll");
}
} else {
return generalDAO.fetchAll(klass);
}
}
/**
* @deprecated use flush(Class<?>)
*/
public void flush() {
throw new DAODispatcherException(
"The flush() method cannot be used with DAODispatcher because it could does not include a Class type to dispatch to. Use flush(Class<?>).");
}
public void flush(Class<?> klass) {
Object specificDAO = getSpecificDAO(klass.getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
((GenericDAO) specificDAO).flush();
} else {
callMethod(specificDAO, "flush");
}
} else {
generalDAO.flush();
}
}
public boolean isConnected(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).isConnected(object);
} else {
return (Boolean) callMethod(specificDAO, "isConnected", object);
}
} else {
return generalDAO.isConnected(object);
}
}
public void refresh(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
((GenericDAO) specificDAO).refresh(object);
} else {
callMethod(specificDAO, "refresh", object);
}
} else {
generalDAO.refresh(object);
}
}
public List search(ISearch search) {
Object specificDAO = getSpecificDAO(search.getSearchClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).searchGeneric(search);
} else {
try {
return (List) callMethod(specificDAO, "searchGeneric", search);
} catch (DAODispatcherException ex) {
if (ex.getCause() instanceof NoSuchMethodException) {
return (List) callMethod(specificDAO, "search", search);
} else {
throw ex;
}
}
}
} else {
return generalDAO.search(search);
}
}
public SearchResult searchAndCount(ISearch search) {
Object specificDAO = getSpecificDAO(search.getSearchClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).searchAndCount(search);
} else {
return (SearchResult) callMethod(specificDAO,
"searchAndCount", search);
}
} else {
return generalDAO.searchAndCount(search);
}
}
public int count(ISearch search) {
Object specificDAO = getSpecificDAO(search.getSearchClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).count(search);
} else {
return (Integer) callMethod(specificDAO, "count", search);
}
} else {
return generalDAO.count(search);
}
}
public Object searchUnique(ISearch search) throws NonUniqueResultException {
Object specificDAO = getSpecificDAO(search.getSearchClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).searchUnique(search);
} else {
return callMethod(specificDAO, "searchUnique", search);
}
} else {
return generalDAO.searchUnique(search);
}
}
public void update(Object object) {
Object specificDAO = getSpecificDAO(object.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
((GenericDAO) specificDAO).update(object);
} else {
callMethod(specificDAO, "update", object);
}
} else {
generalDAO.update(object);
}
}
public Filter getFilterFromExample(Object example) {
Object specificDAO = getSpecificDAO(example.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).getFilterFromExample(example);
} else {
return (Filter) callMethod(specificDAO, "getFilterFromExample", example);
}
} else {
return generalDAO.getFilterFromExample(example);
}
}
public Filter getFilterFromExample(Object example, ExampleOptions options) {
Object specificDAO = getSpecificDAO(example.getClass().getName());
if (specificDAO != null) {
if (specificDAO instanceof GenericDAO) {
return ((GenericDAO) specificDAO).getFilterFromExample(example, options);
} else {
return (Filter) callMethod(specificDAO, "getFilterFromExample", example, options);
}
} else {
return generalDAO.getFilterFromExample(example, options);
}
}
}