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diff --git a/odk/examples/DevelopersGuide/Forms/GridFieldValidator.java b/odk/examples/DevelopersGuide/Forms/GridFieldValidator.java
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+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * The Contents of this file are made available subject to the terms of
+ * the BSD license.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Sun Microsystems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *************************************************************************/
+
+/**************************************************************************/
+import com.sun.star.uno.*;
+import com.sun.star.beans.*;
+import com.sun.star.form.*;
+import com.sun.star.lang.*;
+import com.sun.star.sdb.*;
+import com.sun.star.task.*;
+
+/**************************************************************************/
+/** helper class for validating a grid field before it is updated
+
+ <p>Actually, the mechanism for validating the field is not restricted to
+ grid control fields. Instead, it can be used for any bound controls.</p>
+*/
+class GridFieldValidator implements XUpdateListener
+{
+ private XComponentContext m_xCtx;
+ private XPropertySet m_xWatchedColumn;
+
+ private boolean m_bWatching;
+
+ /* ------------------------------------------------------------------ */
+ public GridFieldValidator( XComponentContext xCtx, XPropertySet xWatchedGridColumn )
+ {
+ // remember
+ m_xCtx = xCtx;
+ m_xWatchedColumn = xWatchedGridColumn;
+ DocumentHelper.getDocumentForComponent(xWatchedGridColumn,
+ xCtx);
+
+ m_bWatching = false;
+ }
+
+ /* ------------------------------------------------------------------ */
+ public void enableColumnWatch( boolean bEnable )
+ {
+ if ( bEnable == m_bWatching )
+ return;
+
+ XUpdateBroadcaster xUpdate = UnoRuntime.queryInterface(
+ XUpdateBroadcaster.class, m_xWatchedColumn );
+
+ if ( bEnable )
+ xUpdate.addUpdateListener( this );
+ else
+ xUpdate.removeUpdateListener( this );
+
+ m_bWatching = bEnable;
+ }
+
+ /* ------------------------------------------------------------------ */
+ /** shows a message that we can't do several things due to an implementation error
+ */
+ private void showInvalidValueMessage( )
+ {
+ try
+ {
+ // build the message we want to show
+ String sMessage = "The column \"";
+ sMessage += FLTools.getLabel( m_xWatchedColumn );
+ sMessage += "\" is not allowed to contain empty strings.";
+
+ SQLContext aError = new SQLContext(
+ "Invalid Value Entered",
+ null,
+ "S1000",
+ 0,
+ new Any( new Type(), null ),
+ sMessage
+ );
+
+ // instantiate an interaction handler who can handle SQLExceptions
+ XInteractionHandler xHandler = UnoRuntime.queryInterface(
+ XInteractionHandler.class,
+ m_xCtx.getServiceManager().createInstanceWithContext(
+ "com.sun.star.task.InteractionHandler", m_xCtx ) );
+
+ // create a new request and execute it
+ InteractionRequest aRequest = new InteractionRequest( aError );
+ xHandler.handle( aRequest );
+ }
+ catch( com.sun.star.uno.Exception e )
+ {
+ System.out.println(e);
+ e.printStackTrace();
+ }
+ }
+
+ /* ------------------------------------------------------------------ */
+ // XUpdateListener overridables
+ /* ------------------------------------------------------------------ */
+ public boolean approveUpdate( EventObject aEvent ) throws com.sun.star.uno.RuntimeException
+ {
+ boolean bApproved = true;
+ try
+ {
+ // the control model which fired the event
+ XPropertySet xSourceProps = UNO.queryPropertySet( aEvent.Source );
+
+ String sNewText = (String)xSourceProps.getPropertyValue( "Text" );
+ if ( 0 == sNewText.length() )
+ {
+ // say that the value is invalid
+ showInvalidValueMessage( );
+ bApproved = false;
+
+ // reset the control value
+ // for this, we take the current value from the row set field the control
+ // is bound to, and forward it to the control model
+ XColumn xBoundColumn = UNO.queryColumn( xSourceProps.getPropertyValue( "BoundField" ) );
+ if ( null != xBoundColumn )
+ {
+ xSourceProps.setPropertyValue( "Text", xBoundColumn.getString() );
+ }
+ }
+ }
+ catch( com.sun.star.uno.Exception e )
+ {
+ System.out.println(e);
+ e.printStackTrace();
+ }
+ return bApproved;
+ }
+
+ /* ------------------------------------------------------------------ */
+ public void updated( EventObject aEvent ) throws com.sun.star.uno.RuntimeException
+ {
+ }
+
+ /* ------------------------------------------------------------------ */
+ // XEventListener overridables
+ /* ------------------------------------------------------------------ */
+ public void disposing( EventObject aEvent )
+ {
+ // not interested in
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */