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/*******************************************************************************
* Copyright (c) 2010-2013, Abel Hegedus, Istvan Rath and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.api.scope;
/**
* Listener interface for change notifications from the VIATRA Base index.
*
* @author Abel Hegedus
* @since 0.9
*
*/
public interface ViatraBaseIndexChangeListener {
/**
* NOTE: it is possible that this method is called only ONCE! Consider returning a constant value that is set in the constructor.
*
* @return true, if the listener should be notified only after index changes, false if notification is needed after each model change
*/
public boolean onlyOnIndexChange();
/**
* Called after a model change is handled by the VIATRA Base index and if <code>indexChanged == onlyOnIndexChange()</code>.
*
* @param indexChanged true, if the model change also affected the contents of the base index
*/
public void notifyChanged(boolean indexChanged);
}
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