/*
* Copyright 2015 herd contributors
*
* 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 org.finra.herd.dao.impl;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.springframework.stereotype.Repository;
import org.finra.herd.dao.NamespaceDao;
import org.finra.herd.model.api.xml.NamespaceKey;
import org.finra.herd.model.jpa.NamespaceEntity;
import org.finra.herd.model.jpa.NamespaceEntity_;
@Repository
public class NamespaceDaoImpl extends AbstractHerdDao implements NamespaceDao
{
@Override
public NamespaceEntity getNamespaceByKey(NamespaceKey namespaceKey)
{
return getNamespaceByCd(namespaceKey.getNamespaceCode());
}
@Override
public NamespaceEntity getNamespaceByCd(String namespaceCode)
{
// Create the criteria builder and the criteria.
CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery<NamespaceEntity> criteria = builder.createQuery(NamespaceEntity.class);
// The criteria root is the namespace.
Root<NamespaceEntity> namespaceEntity = criteria.from(NamespaceEntity.class);
// Create the standard restrictions (i.e. the standard where clauses).
Predicate queryRestriction = builder.equal(builder.upper(namespaceEntity.get(NamespaceEntity_.code)), namespaceCode.toUpperCase());
criteria.select(namespaceEntity).where(queryRestriction);
return executeSingleResultQuery(criteria, String.format("Found more than one namespace with namespaceCode=\"%s\".", namespaceCode));
}
@Override
public List<NamespaceKey> getNamespaces()
{
// Create the criteria builder and a tuple style criteria query.
CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery<String> criteria = builder.createQuery(String.class);
// The criteria root is the business object definition.
Root<NamespaceEntity> namespaceEntity = criteria.from(NamespaceEntity.class);
// Get the columns.
Path<String> namespaceCodeColumn = namespaceEntity.get(NamespaceEntity_.code);
// Add the select clause.
criteria.select(namespaceCodeColumn);
// Add the order by clause.
criteria.orderBy(builder.asc(namespaceCodeColumn));
// Run the query to get a list of namespace codes back.
List<String> namespaceCodes = entityManager.createQuery(criteria).getResultList();
// Populate the "keys" objects from the returned namespace codes.
List<NamespaceKey> namespaceKeys = new ArrayList<>();
for (String namespaceCode : namespaceCodes)
{
namespaceKeys.add(new NamespaceKey(namespaceCode));
}
return namespaceKeys;
}
}