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package com.sun.gjc.spi.jdbc30;

import com.sun.gjc.spi.base.PreparedStatementWrapper;

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

/**
 * Wrapper for JDBC 3.0 PreparedStatement
 */
public class PreparedStatementWrapper30 extends PreparedStatementWrapper {

    /**
     * Creates a new instance of PreparedStatement Wrapper for JDBC 3.0<br>
     *
     * @param con       ConnectionWrapper<br>
     * @param statement PreparedStatement that is wrapped<br>
     */
    public PreparedStatementWrapper30(Connection con,
                                      PreparedStatement statement, boolean enableCaching)
            throws SQLException {
        super(con, statement, enableCaching);
    }

    /**
     * Executes the SQL query in this <code>PreparedStatement</code> object
     * and returns the <code>ResultSet</code> object generated by the query.
     *
     * @return a <code>ResultSet</code> object that contains the data produced by the
     *         query; never <code>null</code>
     * @throws java.sql.SQLException if a database access error occurs or the SQL
     *                               statement does not return a <code>ResultSet</code> object
     */
    public java.sql.ResultSet executeQuery() throws java.sql.SQLException {
        ResultSet rs = preparedStatement.executeQuery();
        return new ResultSetWrapper30(this, rs);
    }

    /**
     * Executes the given SQL statement, which returns a single
     * <code>ResultSet</code> object.
     *
     * @param sql an SQL statement to be sent to the database, typically a
     *            static SQL <code>SELECT</code> statement
     * @return a <code>ResultSet</code> object that contains the data produced
     *         by the given query; never <code>null</code>
     * @throws java.sql.SQLException if a database access error occurs or the given
     *                               SQL statement produces anything other than a single
     *                               <code>ResultSet</code> object
     */
    public java.sql.ResultSet executeQuery(String sql) throws
            java.sql.SQLException {
        ResultSet rs = preparedStatement.executeQuery(sql);
        return new ResultSetWrapper30(this, rs);
    }

    /**
     * Retrieves any auto-generated keys created as a result of executing this
     * <code>Statement</code> object. If this <code>Statement</code> object did
     * not generate any keys, an empty <code>ResultSet</code>
     * object is returned.
     *
     * @return a <code>ResultSet</code> object containing the auto-generated key(s)
     *         generated by the execution of this <code>Statement</code> object
     * @throws java.sql.SQLException if a database access error occurs
     * @since 1.4
     */
    public java.sql.ResultSet getGeneratedKeys() throws java.sql.SQLException {
        ResultSet rs = preparedStatement.getGeneratedKeys();
        if (rs == null)
            return null;
        return new ResultSetWrapper30(this, rs);
    }

    /**
     * Retrieves the current result as a <code>ResultSet</code> object.
     * This method should be called only once per result.
     *
     * @return the current result as a <code>ResultSet</code> object or
     *         <code>null</code> if the result is an update count or there are no more results
     * @throws java.sql.SQLException if a database access error occurs
     * @see #execute
     */
    public java.sql.ResultSet getResultSet() throws java.sql.SQLException {
        ResultSet rs = preparedStatement.getResultSet();
        if (rs == null)
            return null;
        return new ResultSetWrapper30(this, rs);
    }
}