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/* Copyright 2013 David Wolverton
 * 
 * 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 com.googlecode.genericdao.dao.hibernate;

import java.io.Serializable;
import java.util.List;

import com.googlecode.genericdao.dao.DAOUtil;
import com.googlecode.genericdao.search.ExampleOptions;
import com.googlecode.genericdao.search.Filter;
import com.googlecode.genericdao.search.ISearch;
import com.googlecode.genericdao.search.Search;
import com.googlecode.genericdao.search.SearchResult;

/**
 * Implementation of GenericDAO using Hibernate.
 * The SessionFactory property is annotated for automatic resource injection.
 * 
 * @author dwolverton
 * 
 * @param 
 *            The type of the domain object for which this instance is to be
 *            used.
 * @param 
 *            The type of the id of the domain object for which this instance is
 *            to be used.
 */
@SuppressWarnings("unchecked")
public class GenericDAOImpl extends
		HibernateBaseDAO implements GenericDAO {

	protected Class persistentClass = (Class) DAOUtil.getTypeArguments(GenericDAOImpl.class, this.getClass()).get(0);

	public int count(ISearch search) {
		if (search == null)
			search = new Search();
		return _count(persistentClass, search);
	}

	public T find(Serializable id) {
		return _get(persistentClass, id);
	}

	public T[] find(Serializable... ids) {
		return _get(persistentClass, ids);
	}

	public List findAll() {
		return _all(persistentClass);
	}

	public void flush() {
		_flush();
	}

	public T getReference(Serializable id) {
		return _load(persistentClass, id);
	}

	public T[] getReferences(Serializable... ids) {
		return _load(persistentClass, ids);
	}

	public boolean isAttached(T entity) {
		return _sessionContains(entity);
	}

	public void refresh(T... entities) {
		_refresh(entities);
	}

	public boolean remove(T entity) {
		return _deleteEntity(entity);
	}

	public void remove(T... entities) {
		_deleteEntities(entities);
	}

	public boolean removeById(Serializable id) {
		return _deleteById(persistentClass, id);
	}

	public void removeByIds(Serializable... ids) {
		_deleteById(persistentClass, ids);
	}

	public boolean save(T entity) {
		return _saveOrUpdateIsNew(entity);
	}

	public boolean[] save(T... entities) {
		return _saveOrUpdateIsNew(entities);
	}

	public  List search(ISearch search) {
		if (search == null)
			return (List) findAll();
		return _search(persistentClass, search);
	}

	public  SearchResult searchAndCount(ISearch search) {
		if (search == null) {
			SearchResult result = new SearchResult();
			result.setResult((List) findAll());
			result.setTotalCount(result.getResult().size());
			return result;
		}
		return _searchAndCount(persistentClass, search);
	}

	public  RT searchUnique(ISearch search) {
		return (RT) _searchUnique(persistentClass, search);
	}

	public Filter getFilterFromExample(T example) {
		return _getFilterFromExample(example);
	}

	public Filter getFilterFromExample(T example, ExampleOptions options) {
		return _getFilterFromExample(example, options);
	}	
}