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• org.cg.rooster
• 1.0.0
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• DataRepository.java

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org.cg.rooster.DataRepository Maven / Gradle / Ivy

package org.cg.rooster;

import java.io.Serializable;
import org.cg.rooster.core.Query;
import org.springframework.data.domain.Persistable;

/**
 * Interface for generic CRUD operations on a repository for a specific type. 
 * @author WZ
 *
 * @param 
 * @param 
 */
public interface DataRepository, ID extends Serializable> {

	/**
	 * save (create/update) the entity
	 * 
	 * @param entity the entity to save
	 * @return the saved entity, or null if failed
	 */
	public  S save (S entity);
	
	/**
	 * save (create/update) a collection of entities
	 * 
	 * @param entities the entities to save
	 * @return the saved entities, or empty if failed
	 */
	public  Iterable save (final Iterable entities);
	
	/**
	 * check if the entity exist by id
	 * 
	 * @param id the id
	 * @return true if the entity exists
	 */
	public boolean exists (ID id);
	
	/**
	 * get the total number of entities in the table
	 * 
	 * @return the number of rows
	 */
	public long count ();
	
	/**
	 * delete a entity by id
	 *
	 * @param id the id
	 * @return if succeed
	 */
	public boolean delete (ID id);
	
	
	/**
	 * delete a collection of entities by their ids
	 * 
	 * @param ids the ids list
	 * @return if succeed
	 */
	public boolean delete (final Iterable ids);
	
	/**
	 * get a entity by id
	 * 
	 * @param id the id
	 * @return the entity
	 */
	public T get (ID id);
	    	
	/**
	 * find all entities
	 * 
	 * @return a collection of entities
	 */
	public Iterable findAll ();
	
	/**
	 * find entities with query
	 * 
	 * @param query the query
	 * @return a collection of entities
	 */
	public Iterable find (Query query);
	
	/**
	 * find entities with a collection of ids
	 * 
	 * @param ids the ids list
	 * @return a collection of entities
	 */
	public Iterable find (final Iterable ids);
	
	/**
	 * find entities with a collection of ids and query
	 * 
	 * @param ids the ids list
	 * @param query the query
	 * @return a collection of entities
	 */
	public Iterable find (final Iterable ids, Query query);
}