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/*************************************************************************
*
* $RCSfile: ComponentTreeTraversal.java,v $
*
* $Revision: 1.3 $
*
* last change: $Author: hr $ $Date: 2003/06/30 15:26:50 $
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright (c) 2003 by Sun Microsystems, Inc.
* 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.container.*;
import com.sun.star.lang.*;
/**************************************************************************/
/** an abstract interface for components doing an action on a form component
*/
interface IFormComponentAction
{
public abstract void handle( Object aFormComponent ) throws java.lang.Exception;
};
/**************************************************************************/
/** a helper class for travelling a form component tree
*/
class ComponentTreeTraversal implements IFormComponentAction
{
/* ------------------------------------------------------------------ */
/** Indicator method to decide wether to step down the tree.
<p>The default implementation checks if the container given is a grid
control model or a <service scope="com.sun.star.form">FormComponents</service>
instance.</p>
*/
protected boolean shouldStepInto( XIndexContainer xContainer ) throws com.sun.star.uno.Exception
{
// step down the tree, if possible
XServiceInfo xSI = UNO.queryServiceInfo( xContainer );
if ( null != xSI
&& ( xSI.supportsService( "com.sun.star.form.FormComponents" )
|| xSI.supportsService( "com.sun.star.form.component.GridControl" )
)
)
{
return true;
}
else
{
return false;
}
}
/* ------------------------------------------------------------------ */
public void handle( Object aFormComponent ) throws com.sun.star.uno.Exception
{
XIndexContainer xCont = UNO.queryIndexContainer( aFormComponent );
if ( ( null != xCont )
&& shouldStepInto( xCont )
)
{
for ( int i=0; i<xCont.getCount(); ++i )
{
handle( xCont.getByIndex( i ) );
}
}
}
}
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