com.eu.evaluation.server.dao.dictionary.ObjectRelationDAO.java Source code

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Here is the source code for com.eu.evaluation.server.dao.dictionary.ObjectRelationDAO.java

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package com.eu.evaluation.server.dao.dictionary;

import com.eu.evaluation.model.dictionary.ObjectRelation;
import com.eu.evaluation.server.dao.AbstractDAO;
import java.util.List;
import javax.persistence.NoResultException;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.stereotype.Repository;

/**
 *
 * @author dell
 */
@Repository
public class ObjectRelationDAO extends AbstractDAO<ObjectRelation> {

    /**
     * 
     * @param selfClassID
     * @param parentClassID
     * @return 
     */
    public ObjectRelation findByParent(String selfClass, String relationClass) {
        String jpql = "select t from ObjectRelation t where t.selfClass = :selfClass and t.relationClass = :relationClass";
        MapSqlParameterSource params = new MapSqlParameterSource("selfClass", selfClass);
        params.addValue("relationClass", relationClass);
        List<ObjectRelation> result = this.query(jpql, params);
        if (result.isEmpty()) {
            return null;
        } else if (result.size() == 1) {
            return result.get(0);
        } else {
            throw new RuntimeException("?? = " + selfClass + " ;  = "
                    + selfClass + "?????");
        }
    }

    /**
     * ?
     * @param selfClassID
     * @return 
     */
    public List<ObjectRelation> findChild(String selfClass) {
        String jpql = "select t from ObjectRelation t where t.relationClass = :relationClass";
        MapSqlParameterSource params = new MapSqlParameterSource("relationClass", selfClass);
        return this.query(jpql, params);
    }

    public int removeAll() {
        String jpql = "delete from ObjectRelation t";
        return this.createQuery(jpql, null).executeUpdate();
    }

}