source: tapas/persistence/implementation/com/ether/EnumUserType.java @ 376

package com.ether;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

/**
 * The enum user type.
 */
public abstract class EnumUserType<E extends Enum<E>> extends SimpleUserType
{
    protected EnumUserType(final Class<E> clazz) {
        _clazz = clazz;
    }

    public int[] sqlTypes() {
        return SQL_TYPES;
    }

    public Class returnedClass() {
        return _clazz;
    }

    public Object nullSafeGet(final ResultSet resultSet, final String[] names,
            final Object owner) throws HibernateException, SQLException {
        final String name = resultSet.getString(names[0]);
        E result = null;
        if (!resultSet.wasNull()) {
            result = Enum.valueOf(_clazz, name);
        }
        return result;
    }

    public void nullSafeSet(final PreparedStatement preparedStatement,
            final Object value, final int index) throws HibernateException,
            SQLException {
        if (null == value) {
            HIBERNATE_TYPE_LOGGER.trace("binding null to parameter: " + index);
            preparedStatement.setNull(index, Types.NVARCHAR);
        } else {
            final String stringValue = ((Enum) value).name();
            HIBERNATE_TYPE_LOGGER.trace("binding '" + stringValue
                    + "' to parameter: " + index);
            preparedStatement.setString(index, stringValue);
        }
    }

    private static final Log HIBERNATE_TYPE_LOGGER = LogFactory.getLog(org.hibernate.type.Type.class);

    private static final int[] SQL_TYPES = { Types.NVARCHAR };

    private Class<E> _clazz = null;
}