/*
* 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.FileTypeDao;
import org.finra.herd.model.api.xml.FileTypeKey;
import org.finra.herd.model.jpa.FileTypeEntity;
import org.finra.herd.model.jpa.FileTypeEntity_;
@Repository
public class FileTypeDaoImpl extends AbstractHerdDao implements FileTypeDao
{
@Override
public FileTypeEntity getFileTypeByCode(String code)
{
// Create the criteria builder and the criteria.
CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery<FileTypeEntity> criteria = builder.createQuery(FileTypeEntity.class);
// The criteria root is the file types.
Root<FileTypeEntity> fileType = criteria.from(FileTypeEntity.class);
// Create the standard restrictions (i.e. the standard where clauses).
Predicate fileTypeCodeRestriction = builder.equal(builder.upper(fileType.get(FileTypeEntity_.code)), code.toUpperCase());
criteria.select(fileType).where(fileTypeCodeRestriction);
return executeSingleResultQuery(criteria, String.format("Found more than one file type with code \"%s\".", code));
}
@Override
public List<FileTypeKey> getFileTypes()
{
// 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 file type.
Root<FileTypeEntity> fileTypeEntity = criteria.from(FileTypeEntity.class);
// Get the columns.
Path<String> fileTypeCodeColumn = fileTypeEntity.get(FileTypeEntity_.code);
// Add the select clause.
criteria.select(fileTypeCodeColumn);
// Add the order by clause.
criteria.orderBy(builder.asc(fileTypeCodeColumn));
// Run the query to get a list of file type codes back.
List<String> fileTypeCodes = entityManager.createQuery(criteria).getResultList();
// Populate the "keys" objects from the returned file type codes.
List<FileTypeKey> fileTypeKeys = new ArrayList<>();
for (String fileTypeCode : fileTypeCodes)
{
fileTypeKeys.add(new FileTypeKey(fileTypeCode));
}
return fileTypeKeys;
}
}