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/*******************************************************************************
* Copyright (c) 2010-2012, Bergmann Gabor, 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;
import java.util.function.Consumer;
/**
* A default implementation of {@link IMatchUpdateListener} that contains two match processors, one for appearance, one
* for disappearance. Any of the two can be null; in this case, corresponding notifications will be ignored.
*
* <p>
* Instantiate using either constructor.
*
* @author Bergmann Gabor
*
*/
public class MatchUpdateAdapter<Match extends IPatternMatch> implements IMatchUpdateListener<Match> {
Consumer<Match> appearCallback;
Consumer<Match> disappearCallback;
/**
* Constructs an instance without any match processors registered yet.
*
* Use {@link #setAppearCallback(Consumer)} and {@link #setDisappearCallback(Consumer)} to specify
* optional match processors for match appearance and disappearance, respectively.
*/
public MatchUpdateAdapter() {
super();
}
/**
* Constructs an instance by specifying match processors.
*
* @param appearCallback
* a match processor that will be invoked on each new match that appears. If null, no callback will be
* executed on match appearance. See {@link Consumer} for details on how to implement.
* @param disappearCallback
* a match processor that will be invoked on each existing match that disappears. If null, no callback
* will be executed on match disappearance. See {@link Consumer} for details on how to implement.
* @since 2.0
*/
public MatchUpdateAdapter(Consumer<Match> appearCallback, Consumer<Match> disappearCallback) {
super();
setAppearCallback(appearCallback);
setDisappearCallback(disappearCallback);
}
/**
* @return the match processor that will be invoked on each new match that appears. If null, no callback will be
* executed on match appearance.
* @since 2.0
*/
public Consumer<Match> getAppearCallback() {
return appearCallback;
}
/**
* @param appearCallback
* a match processor that will be invoked on each new match that appears. If null, no callback will be
* executed on match appearance. See {@link Consumer} for details on how to implement.
* @since 2.0
*/
public void setAppearCallback(Consumer<Match> appearCallback) {
this.appearCallback = appearCallback;
}
/**
* @return the match processor that will be invoked on each existing match that disappears. If null, no callback
* will be executed on match disappearance.
* @since 2.0
*/
public Consumer<Match> getDisappearCallback() {
return disappearCallback;
}
/**
* @param disappearCallback
* a match processor that will be invoked on each existing match that disappears. If null, no callback
* will be executed on match disappearance. See {@link Consumer} for details on how to implement.
* @since 2.0
*/
public void setDisappearCallback(Consumer<Match> disappearCallback) {
this.disappearCallback = disappearCallback;
}
@Override
public void notifyAppearance(Match match) {
if (appearCallback != null)
appearCallback.accept(match);
}
@Override
public void notifyDisappearance(Match match) {
if (disappearCallback != null)
disappearCallback.accept(match);
}
}
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