MicroBlogRepository.java

package br.com.dextra.dextranet.microblog;

import java.util.ArrayList;
import java.util.List;

import br.com.dextra.dextranet.persistencia.EntidadeOrdenacao;
import br.com.dextra.dextranet.persistencia.EntidadeRepository;

import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.EntityNotFoundException;
import com.google.appengine.api.datastore.PreparedQuery;
import com.google.appengine.api.datastore.Query;

public class MicroBlogRepository extends EntidadeRepository {

	public List<MicroPost> buscarMicroPosts() {
		Query query = new Query(MicroPost.class.getName());
		PreparedQuery prepared = this.datastore.prepare(query);
		return toMicroPosts(prepared.asIterable());
	}

	public List<MicroPost> lista(EntidadeOrdenacao... criterioOrdenacao) {
		return this.lista(null, null, criterioOrdenacao);
	}

	public List<MicroPost> lista(Integer registrosPorPagina, Integer numeroDaPagina, EntidadeOrdenacao... criterioOrdenacao) {
		List<MicroPost> microPosts = new ArrayList<MicroPost>();
		Iterable<Entity> entidades = super.lista(MicroPost.class, registrosPorPagina, numeroDaPagina, criterioOrdenacao);

		for (Entity entidade : entidades) {
			MicroPost microPost = new MicroPost(entidade);
			microPosts.add(microPost);
		}

		return microPosts;
	}

	public void remove(String id) {
		super.remove(id, MicroPost.class);
	}

	public List<MicroPost> toMicroPosts(Iterable<Entity> asIterable) {
		List<MicroPost> listaMicroPosts = new ArrayList<MicroPost>();

		for (Entity entity : asIterable) {
			listaMicroPosts.add(new MicroPost(entity));
		}

		return listaMicroPosts;
	}

	public void salvar(MicroPost micropost) {
		this.persiste(micropost);
	}

	public MicroPost obtemPorId(String id) throws EntityNotFoundException {
		Entity postEnt = super.obtemPorId(id, MicroPost.class);
		MicroPost microPost = new MicroPost(postEnt);
		return microPost;
	}
}