/* SQLData.java -- Custom mapping for a user defined datatype
   Copyright (C) 1999, 2000, 2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

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package java.sql;

/**
 * This interface is used for mapping SQL data to user defined datatypes.
 *
 * @author Aaron M. Renn (arenn@urbanophile.com)
 */
public interface SQLData 
{
  /**
   * This method returns the user defined datatype name for this object.
   *
   * @return The user defined data type name for this object.
   * @exception SQLException If an error occurs.
   */
  String getSQLTypeName() throws SQLException;

  /**
   * This method populates the data in the object from the specified stream.
   *
   * @param stream The stream to read the data from.
   * @param typeName The data type name of the data on the stream.
   * @exception SQLException If an error occurs.
   */
  void readSQL(SQLInput stream, String typeName) throws SQLException;

  /**
   * This method writes the data in this object to the specified stream.
   *
   * @param stream The stream to write the data to.
   * @exception SQLException If an error occurs.
   */
  void writeSQL(SQLOutput stream) throws SQLException;
}