98 lines
3.8 KiB
Java
98 lines
3.8 KiB
Java
/*************************************************************************
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*
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* $RCSfile: ComponentTreeTraversal.java,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: hr $ $Date: 2003-06-30 15:26:50 $
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*
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* The Contents of this file are made available subject to the terms of
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* the BSD license.
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*
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* Copyright (c) 2003 by Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*************************************************************************/
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import com.sun.star.uno.*;
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import com.sun.star.container.*;
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import com.sun.star.lang.*;
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/**************************************************************************/
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/** an abstract interface for components doing an action on a form component
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*/
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interface IFormComponentAction
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{
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public abstract void handle( Object aFormComponent ) throws java.lang.Exception;
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};
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/**************************************************************************/
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/** a helper class for travelling a form component tree
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*/
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class ComponentTreeTraversal implements IFormComponentAction
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{
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/* ------------------------------------------------------------------ */
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/** Indicator method to decide wether to step down the tree.
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<p>The default implementation checks if the container given is a grid
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control model or a <service scope="com.sun.star.form">FormComponents</service>
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instance.</p>
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*/
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protected boolean shouldStepInto( XIndexContainer xContainer ) throws com.sun.star.uno.Exception
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{
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// step down the tree, if possible
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XServiceInfo xSI = UNO.queryServiceInfo( xContainer );
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if ( null != xSI
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&& ( xSI.supportsService( "com.sun.star.form.FormComponents" )
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|| xSI.supportsService( "com.sun.star.form.component.GridControl" )
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)
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)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/* ------------------------------------------------------------------ */
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public void handle( Object aFormComponent ) throws com.sun.star.uno.Exception
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{
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XIndexContainer xCont = UNO.queryIndexContainer( aFormComponent );
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if ( ( null != xCont )
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&& shouldStepInto( xCont )
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)
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{
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for ( int i=0; i<xCont.getCount(); ++i )
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{
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handle( xCont.getByIndex( i ) );
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}
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}
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}
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}
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