/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.cocoon.components.language.markup.xsp;

import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.CallableStatement;
import java.sql.Connection;

/**
 * Database specific EsqlQuery
 * @author <a href="mailto:tcurdt@apache.org">Torsten Curdt</a>
 * @version CVS $Id$
 */
final public class SybaseEsqlQuery extends AbstractEsqlQuery {

    public SybaseEsqlQuery(Connection connection, String query) {
        super(connection, query);
    }

    /**
     * Only newInstance may use this contructor
     * @param resultSet
     */
    private SybaseEsqlQuery(final ResultSet resultSet) {
        super(resultSet);
    }

    /**
     * Create a EsqlQuery of the same type
     * @param resultSet
     */
    public AbstractEsqlQuery newInstance(ResultSet resultSet) {
        return(new SybaseEsqlQuery(resultSet));
    }

    public String getQueryString() throws SQLException {
        if (getMaxRows() > -1) {
            String original = super.getQueryString().trim();
            int command = original.indexOf(' ');
            return (new StringBuffer()
                    .append(original.substring(0,command))
                    .append(" TOP ").append(getMaxRows()+1 + getSkipRows())
                    .append(original.substring(command))
                    .toString());
        }
        else {
            return (super.getQueryString());
        }
    }

    public PreparedStatement prepareStatement() throws SQLException {
        return (
                setPreparedStatement(
                        getConnection().prepareStatement(
                                getQueryString(),
                                ResultSet.TYPE_SCROLL_INSENSITIVE,
                                ResultSet.CONCUR_READ_ONLY)
                ));
    }

    public CallableStatement prepareCall() throws SQLException {
        return (
                (CallableStatement) setPreparedStatement(
                        getConnection().prepareCall(
                                getQueryString(),
                                ResultSet.TYPE_SCROLL_INSENSITIVE,
                                ResultSet.CONCUR_READ_ONLY
                        )
                )
                );
    }

    public void getResultRows() throws SQLException {
        final int skip = getSkipRows();
        if (skip > 0) {
            getResultSet().absolute(skip);
        }
        setPosition(skip);
    }

}