org.hibernate.criterion.PropertyProjection.java Source code

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Here is the source code for org.hibernate.criterion.PropertyProjection.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.criterion;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.type.Type;

/**
 * A property value, or grouped property value
 *
 * @author Gavin King
 * @author Steve Ebersole
 */
public class PropertyProjection extends SimpleProjection {
    private String propertyName;
    private boolean grouped;

    protected PropertyProjection(String prop, boolean grouped) {
        this.propertyName = prop;
        this.grouped = grouped;
    }

    protected PropertyProjection(String prop) {
        this(prop, false);
    }

    @Override
    public boolean isGrouped() {
        return grouped;
    }

    public String getPropertyName() {
        return propertyName;
    }

    @Override
    public Type[] getTypes(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
        return new Type[] { criteriaQuery.getType(criteria, propertyName) };
    }

    @Override
    public String toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery)
            throws HibernateException {
        final StringBuilder buf = new StringBuilder();
        final String[] cols = criteriaQuery.getColumns(propertyName, criteria);
        for (int i = 0; i < cols.length; i++) {
            buf.append(cols[i]).append(" as y").append(position + i).append('_');
            if (i < cols.length - 1) {
                buf.append(", ");
            }
        }
        return buf.toString();
    }

    @Override
    public String toGroupSqlString(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
        if (!grouped) {
            return super.toGroupSqlString(criteria, criteriaQuery);
        } else {
            return String.join(", ", criteriaQuery.getColumns(propertyName, criteria));
        }
    }

    @Override
    public String toString() {
        return propertyName;
    }

}