org.ednovo.gooru.infrastructure.persistence.hibernate.SubjectRepositoryHibernate.java Source code

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Here is the source code for org.ednovo.gooru.infrastructure.persistence.hibernate.SubjectRepositoryHibernate.java

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/////////////////////////////////////////////////////////////
// SubjectRepositoryHibernate.java
// gooru-api
// Created by Gooru on 2015
// Copyright (c) 2015 Gooru. All rights reserved.
// http://www.goorulearning.org/
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/////////////////////////////////////////////////////////////
package org.ednovo.gooru.infrastructure.persistence.hibernate;

import java.util.List;
import java.util.Map;

import org.ednovo.gooru.core.api.model.Subject;
import org.ednovo.gooru.core.constant.ConstantProperties;
import org.ednovo.gooru.core.constant.ParameterProperties;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.springframework.stereotype.Repository;

@Repository
public class SubjectRepositoryHibernate extends BaseRepositoryHibernate
        implements SubjectRepository, ParameterProperties, ConstantProperties {

    private static final String SUBJECT_MAX = "SELECT COALESCE(MAX(displaySequence),0) FROM Subject";
    private static final String SUBJECTS = "FROM Subject subject where subject.activeFlag=1";
    private static final String SUBJECT = "FROM Subject subject WHERE subject.subjectId=:subjectId";
    private static final String COURSES = "select c.course_id courseId,c.name,c.image_path imagePath from subject s inner join course c on s.subject_id=c.subject_id where s.subject_id=:subjectId";

    @Override
    public Subject getSubject(Integer subjectId) {
        Query query = getSession().createQuery(SUBJECT).setParameter(SUBJECT_ID, subjectId);
        return (Subject) (query.list().size() > 0 ? query.list().get(0) : null);
    }

    @Override
    public List<Map<String, Object>> getCourses(int offset, int limit, int subjectId) {
        Query query = getSession().createSQLQuery(COURSES).setParameter(SUBJECT_ID, subjectId);
        query.setMaxResults(limit != 0 ? (limit > MAX_LIMIT ? MAX_LIMIT : limit) : limit);
        query.setFirstResult(offset);
        query.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP);
        return list(query);
    }

    public List<Subject> getSubjects(Integer classificationTypeId, int limit, int offset) {
        StringBuilder hql = new StringBuilder(SUBJECTS);
        if (classificationTypeId != null) {
            hql.append(" and subject.classificationTypeId=:classificationTypeId");
        }
        hql.append(" order by displaySequence");
        Query query = getSession().createQuery(hql.toString());
        query.setMaxResults(limit != 0 ? (limit > MAX_LIMIT ? MAX_LIMIT : limit) : limit);
        query.setFirstResult(offset);
        if (classificationTypeId != null) {
            query.setParameter(CLASSIFICATION_TYPE_ID, classificationTypeId);
        }
        return list(query);
    }

    @Override
    public Integer getMaxSequence() {
        Query query = getSession().createQuery(SUBJECT_MAX);
        return (Integer) query.list().get(0);
    }

}