Repository.java

package com.acme.jpa;

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

public interface Repository {
    public void create(Serializable entity);

    public void delete(Serializable entity);

    public <T> T retrieveById(Class<T> type, Long id);

    public <T> List<T> retrieveByQuery(Class<T> type, String query, String... params);

    public void update(Serializable entity);

    public void saveNonManaged(Serializable entity);

    public boolean isManaging(Serializable entity);

    public void close();
}