package adql.search;
/*
* This file is part of ADQLLibrary.
*
* ADQLLibrary is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* ADQLLibrary 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with ADQLLibrary. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012 - UDS/Centre de Données astronomiques de Strasbourg (CDS)
*/
import adql.query.ADQLObject;
/**
* <p>In this handler the replacement ADQLObject is always <i>null</i>.
* It may be interpreted as a removal of the matched ADQL item from its ADQL parent.</p>
*
* <p><b><u>IMPORTANT:</u> It is the responsibility of the object which calls this method to apply the removal !</b></p>
*
* @author Grégory Mantelet (CDS)
* @version 11/2010
*/
public abstract class RemoveHandler extends SimpleReplaceHandler {
public RemoveHandler(){
super();
}
public RemoveHandler(boolean recursive, boolean onlyFirstMatch){
super(recursive, onlyFirstMatch);
}
public RemoveHandler(boolean recursive){
super(recursive);
}
/**
* Always returns <i>null</i>. It may be interpreted as a removal of the matched ADQL item from its ADQL parent.
*
* <p><b><u>IMPORTANT:</u> It is the responsibility of the object which calls this method to apply the removal !</b></p>
*
* @see adql.search.SimpleReplaceHandler#getReplacer(adql.query.ADQLObject)
*/
@Override
public ADQLObject getReplacer(ADQLObject objToReplace){
return null;
}
}