/*
 * @(#)RowSetMetaData.java	1.10 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.sql;

import java.sql.*;

/**
 * An object that contains information about the columns in a
 * <code>RowSet</code> object.  This interface is
 * an extension of the <code>ResultSetMetaData</code> interface with 
 * methods for setting the values in a <code>RowSetMetaData</code> object.  
 * When a <code>RowSetReader</code> object reads data into a <code>RowSet</code>
 * object, it creates a <code>RowSetMetaData</code> object and initializes it
 * using the methods in the <code>RowSetMetaData</code> interface.  Then the
 * reader passes the <code>RowSetMetaData</code> object to the rowset.
 * <P>
 * The methods in this interface are invoked internally when an application
 * calls the method <code>RowSet.execute</code>; an application
 * programmer would not use them directly.
 * 
 * @since 1.4 
 */

public interface RowSetMetaData extends ResultSetMetaData {

  /**
   * Sets the number of columns in the <code>RowSet</code> object to
   * the given number.
   *
   * @param columnCount the number of columns in the <code>RowSet</code> object
   * @exception SQLException if a database access error occurs
   */
  void setColumnCount(int columnCount) throws SQLException;

  /**
   * Sets whether the designated column is automatically numbered, 
   * The default is for a <code>RowSet</code> object's
   * columns not to be automatically numbered.
   *
   * @param columnIndex the first column is 1, the second is 2, ...
   * @param property <code>true</code> if the column is automatically
   *                 numbered; <code>false</code> if it is not
   *
   * @exception SQLException if a database access error occurs
   */
  void setAutoIncrement(int columnIndex, boolean property) throws SQLException;

  /**
   * Sets whether the designated column is case sensitive.
   * The default is <code>false</code>.
   *
   * @param columnIndex the first column is 1, the second is 2, ...
   * @param property <code>true</code> if the column is case sensitive;
   *                 <code>false</code> if it is not
   *
   * @exception SQLException if a database access error occurs
   */
  void setCaseSensitive(int columnIndex, boolean property) throws SQLException;	

  /**
   * Sets whether the designated column can be used in a where clause.
   * The default is <code>false</code>.
   *
   * @param columnIndex the first column is 1, the second is 2, ...
   * @param property <code>true</code> if the column can be used in a 
   *                 <code>WHERE</code> clause; <code>false</code> if it cannot
   *
   * @exception SQLException if a database access error occurs
   */
  void setSearchable(int columnIndex, boolean property) throws SQLException;
  
  /**
   * Sets whether the designated column is a cash value.
   * The default is <code>false</code>.
   *
   * @param columnIndex the first column is 1, the second is 2, ...
   * @param property <code>true</code> if the column is a cash value;
   *                 <code>false</code> if it is not
   *
   * @exception SQLException if a database access error occurs
   */
  void setCurrency(int columnIndex, boolean property) throws SQLException;
  
  /**
   * Sets whether the designated column's value can be set to 
   * <code>NULL</code>.
   * The default is <code>ResultSetMetaData.columnNullableUnknown</code>
   *
   * @param columnIndex the first column is 1, the second is 2, ...
   * @param property one of the following constants:
   *                 <code>ResultSetMetaData.columnNoNulls</code>, 
   *                 <code>ResultSetMetaData.columnNullable</code>, or
   *                 <code>ResultSetMetaData.columnNullableUnknown</code> 
   *
   * @exception SQLException if a database access error occurs