/*******************************************************************************
* Copyright (c) 2009-2013 CWI
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* * Anya Helene Bagge - anya@ii.uib.no (Univ. Bergen)
*******************************************************************************/
package org.rascalmpl.tasks;
import java.util.Collection;
import org.rascalmpl.debug.IRascalMonitor;
public interface ITask<KeyType,NameType,ValueType> {
/**
* Produce the fact requested by the <key,name> combination, and define it in tr.
*
* The allowed key arguments are given by getKeys() below.
*
* May also produce additional facts.
*
* @return true if the task was authorative for this key/name combination, false if
* it failed to produce the fact and was not authorative (i.e., we should try again with
* a different task).
*/
boolean produce(IRascalMonitor monitor, ITransaction<KeyType,NameType,ValueType> tr, KeyType key, NameType name);
/**
* The facts this producer should be considered a primary supplier of.
*/
Collection<KeyType> getKeys();
}