com.nec.harvest.service.impl.SmallCategoryServiceImpl.java Source code

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Here is the source code for com.nec.harvest.service.impl.SmallCategoryServiceImpl.java

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/*
 * Copyright(C) 2014
 * NEC Corporation All rights reserved.
 * 
 * No permission to use, copy, modify and distribute this software
 * and its documentation for any purpose is granted.
 * This software is provided under applicable license agreement only.
 */
package com.nec.harvest.service.impl;

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

import org.apache.commons.lang.StringUtils;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.transform.Transformers;

import com.nec.crud.hibernate.HibernateSessionManager;
import com.nec.harvest.constant.SqlConstants;
import com.nec.harvest.exception.ServiceException;
import com.nec.harvest.model.SmallCategory;
import com.nec.harvest.repository.SmallCategoryRepository;
import com.nec.harvest.service.SmallCategoryService;

/**
 * {@link SmallCategoryService}
 * 
 * @author huonghv
 *
 */
public class SmallCategoryServiceImpl implements SmallCategoryService {

    private static final String SMALL_CATEGORY_CLASSIFY = "2";

    private SmallCategoryRepository repository;

    public SmallCategoryServiceImpl(SmallCategoryRepository smallCategoryRepository) {
        this.repository = smallCategoryRepository;
    }

    /** {@inheritDoc} */
    @Override
    public List<SmallCategory> findAll() throws ServiceException {
        return findByClassify(SMALL_CATEGORY_CLASSIFY);
    }

    /** {@inheritDoc} */
    @Override
    public List<SmallCategory> findByClassify(String classifyCategory) throws ServiceException {
        if (StringUtils.isEmpty(classifyCategory)) {
            throw new IllegalArgumentException("The category classify must not be empty");
        }

        final Session session = HibernateSessionManager.getSession();
        Transaction tx = null;

        List<SmallCategory> smallCategories = new ArrayList<SmallCategory>();
        try {
            tx = session.beginTransaction();
            Query query = repository.getNamedQuery(session, SqlConstants.SQL_FIND_SMALL_CATEGORY);
            query.setResultTransformer(Transformers.aliasToBean(SmallCategory.class));
            smallCategories = repository.findByQuery(query);

            // Release transaction
            tx.commit();
        } catch (HibernateException ex) {
            if (tx != null) {
                tx.rollback();
            }
            throw new ServiceException(
                    "Hibernate runtime exception occur when get small category with its classify "
                            + classifyCategory,
                    ex);
        } finally {
            HibernateSessionManager.closeSession(session);
        }
        return smallCategories;
    }

}