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diff --git a/libjava/java/sql/SQLData.java b/libjava/java/sql/SQLData.java
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+/* SQLData.java -- Custom mapping for a user defined datatype
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+
+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.
+  */
+public abstract 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 name The data type name of the data on the stream.
+  *
+  * @exception SQLException If an error occurs.
+  */
+public abstract void
+readSQL(SQLInput stream, String name) 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.
+  */
+public abstract void
+writeSQL(SQLOutput stream) throws SQLException;
+
+} // interface SQLData
+