/*
 * Copyright 2004-2013 the Seasar Foundation and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.seasar.extension.jdbc.impl;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

import org.seasar.extension.jdbc.ResultSetHandler;
import org.seasar.extension.jdbc.ValueType;
import org.seasar.extension.jdbc.types.ValueTypes;

/**
 * 単独のオブジェクトを返す {@link ResultSetHandler}です。
 * 
 * @author higa
 * 
 */
public class ObjectResultSetHandler implements ResultSetHandler {

    /**
     * {@link ObjectResultSetHandler}を作成します。
     */
    public ObjectResultSetHandler() {
    }

    public Object handle(ResultSet rs) throws SQLException {
        if (rs.next()) {
            ResultSetMetaData rsmd = rs.getMetaData();
            ValueType valueType = ValueTypes
                    .getValueType(rsmd.getColumnType(1));
            return valueType.getValue(rs, 1);
        }
        return null;
    }
}