corner.orm.hibernate.impl.EntityServiceImpl.java Source code

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Here is the source code for corner.orm.hibernate.impl.EntityServiceImpl.java

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/* 
 * Copyright 2009 The Corner Team.
 * 
 * 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 corner.orm.hibernate.impl;

import java.io.Serializable;
import java.sql.SQLException;
import java.util.Iterator;

import org.apache.tapestry5.ioc.services.TypeCoercer;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.springframework.dao.DataAccessException;
import org.springframework.orm.ObjectRetrievalFailureException;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;

import corner.orm.hibernate.Hibernate;
import corner.orm.model.PaginationList;
import corner.orm.model.PaginationOptions;
import corner.orm.services.EntityService;

/**
 * ?.
 * @author <a href="jun.tsai@ganshane.net">Jun Tsai</a>
 * @version $Revision$
 * @since 0.0.1
 */
@Hibernate
public class EntityServiceImpl implements EntityService {
    private final HibernateTemplate template;
    private PaginatedEntityService paginatedService;

    public EntityServiceImpl(final Session session, final TypeCoercer typeCoercer) {
        this.template = new HibernateTemplate() {
            /**
             * @see org.springframework.orm.hibernate3.HibernateTemplate#execute(org.springframework.orm.hibernate3.HibernateCallback, boolean)
             */
            @Override
            public Object doExecute(HibernateCallback action, boolean enforceNewSession,
                    boolean enforceNativeSessio) throws DataAccessException {
                try {
                    return action.doInHibernate(session);
                } catch (HibernateException ex) {
                    throw convertHibernateAccessException(ex);
                } catch (SQLException ex) {
                    throw convertJdbcAccessException(ex);
                }
            }
        };
        this.paginatedService = new PaginatedEntityService(template, typeCoercer);

    }

    @Override
    public long count(Class<?> persistClass, Object conditions) {
        return paginatedService.count(persistClass, conditions);
    }

    @Override
    public <T> void delete(T object) {
        this.template.delete(object);
    }

    @Override
    public <T> Iterator<T> find(Class<T> persistClass, Object conditions, String order) {
        return this.find(persistClass, conditions, order, 0, Integer.MAX_VALUE);
    }

    @Override
    public <T> Iterator<T> find(Class<T> persistClass, Object conditions, String order, int start, int offset) {
        return paginatedService.find(persistClass, conditions, order, start, offset);
    }

    @Override
    public <T> T get(Class<T> clazz, Object id) {
        return (T) this.template.get(clazz, (Serializable) id);
    }

    @Override
    public <T> PaginationList<T> paginate(Class<T> persistClass, Object conditions, String order,
            PaginationOptions options) {
        return paginatedService.paginate(persistClass, conditions, order, options);
    }

    @Override
    public <T> void save(T object) {
        this.template.save(object);

    }

    @Override
    public <T> void update(T object) {
        template.update(object);

    }

    @Override
    public <T> void refresh(T entity) {
        template.refresh(entity);
    }

    @Override
    public <T> void saveOrUpdate(T entity) {
        template.saveOrUpdate(entity);
    }

    @Override
    public Class getEntityClass(Object entity) {
        return org.hibernate.Hibernate.getClass(entity);
    }

    @Override
    public <T> T findUnique(Class<T> clazz, Object[] conditions) {
        Iterator<T> it = this.find(clazz, conditions, null);
        T result = null;
        if (it.hasNext()) {
            result = it.next();
        }
        if (it.hasNext()) {
            throw new ObjectRetrievalFailureException("?!,?.", null);
        }
        return result;
    }
}