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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
*
* 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:
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.moka.fuml.Semantics.Activities.IntermediateActivities;
import org.eclipse.papyrus.moka.fuml.Semantics.Classes.Kernel.Value;
public class ForkedToken extends Token {
public Token baseToken;
/*
* The remaining number of outstanding offers for this token on outgoing
* edges of the fork node.
*/
public Integer remainingOffersCount;
/*
* Indicates whether withdraw() has been called on the base token.
*/
public Boolean baseTokenIsWithdrawn;
public Boolean isControl() {
// Test if the base token is a control token.
return this.baseToken.isControl();
}
public void withdraw() {
// If the base token is not withdrawn, then withdraw it.
// Decrement the remaining offers count.
// When the remaining number of offers is zero, then remove this token
// from its holder.
if(!this.baseTokenIsWithdrawn & !this.baseToken.isWithdrawn()) {
this.baseToken.withdraw();
// NOTE: This keeps a base token that is a forked token from being
// withdrawn more than once, since withdrawing a forked token may
// not actually remove it from its fork node holder.
this.baseTokenIsWithdrawn = true;
}
if(this.remainingOffersCount > 0) {
this.remainingOffersCount = this.remainingOffersCount - 1;
}
if(this.remainingOffersCount == 0) {
super.withdraw();
}
}
public Token copy() {
// Return a copy of the base token.
return this.baseToken.copy();
}
public Boolean equals(Token otherToken) {
// Test if this token is equal to another token.
return this == otherToken;
}
public Value getValue() {
// Return the value of the base token.
return this.baseToken.getValue();
}
}
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