EntityReferenceQueryImpl.java

package fr.openwide.core.jpa.business.generic.query;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import com.google.common.primitives.Ints;

import fr.openwide.core.jpa.business.generic.model.GenericEntity;
import fr.openwide.core.jpa.business.generic.model.GenericEntityCollectionReference;
import fr.openwide.core.jpa.business.generic.service.IEntityService;

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class EntityReferenceQueryImpl<T extends GenericEntity<?, ?>> implements IEntityReferenceQuery<T> {
	
	private GenericEntityCollectionReference<?, T> reference;
	
	@Autowired
	private IEntityService entityService;
	
	@Override
	public EntityReferenceQueryImpl<T> setReference(GenericEntityCollectionReference<?, T> reference) {
		this.reference = reference;
		return this;
	}

	@Override
	@Transactional(readOnly = true)
	public List<T> fullList() {
		return entityService.listEntity(reference);
	}

	@Override
	@Transactional(readOnly = true)
	public List<T> list(long offset, long limit) {
		GenericEntityCollectionReference<?, T> subset =
				reference.subset(Ints.checkedCast(offset), Ints.checkedCast(limit));
		return entityService.listEntity(subset);
	}

	@Override
	public long count() {
		return reference.getEntityIdList().size();
	}

}