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135 lines
3.1 KiB
135 lines
3.1 KiB
//==============================================================================
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//
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// Copyright (c) 2014-
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// Authors:
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// * Joachim Klein <klein@tcs.inf.tu-dresden.de> (TU Dresden)
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//
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//------------------------------------------------------------------------------
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//
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// This file is part of PRISM.
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//
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// PRISM is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// PRISM is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with PRISM; if not, write to the Free Software Foundation,
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// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//==============================================================================
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package acceptance;
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import java.util.BitSet;
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import jdd.JDDVars;
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/**
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* A reachability acceptance condition (based on BitSet state sets).
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* The acceptance is defined via a set of goal states and
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* has to be "upward-closed", i.e., once a goal state has been reached,
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* all successor states are goal states as well.
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*/
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public class AcceptanceReach implements AcceptanceOmega
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{
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/** The set of goal states */
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private BitSet goalStates = new BitSet();
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/** Constructor (no goal states) */
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public AcceptanceReach()
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{
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}
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/** Constructor (set goal states) */
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public AcceptanceReach(BitSet goalStates)
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{
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this.goalStates = goalStates;
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}
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/** Get the goal state set */
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public BitSet getGoalStates()
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{
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return goalStates;
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}
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/** Set the goal state set */
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public void setGoalStates(BitSet goalStates)
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{
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this.goalStates = goalStates;
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}
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/** Make a copy of the acceptance condition. */
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public AcceptanceReach clone()
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{
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return new AcceptanceReach((BitSet)goalStates.clone());
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}
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@Override
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public boolean isBSCCAccepting(BitSet bscc_states)
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{
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return bscc_states.intersects(goalStates);
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}
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@Override
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public void lift(LiftBitSet lifter)
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{
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goalStates=lifter.lift(goalStates);
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}
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@Override
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public AcceptanceReachDD toAcceptanceDD(JDDVars ddRowVars)
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{
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return new AcceptanceReachDD(this, ddRowVars);
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}
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@Override
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public AcceptanceGeneric toAcceptanceGeneric()
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{
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return new AcceptanceGeneric(AcceptanceGeneric.ElementType.INF, (BitSet) goalStates.clone());
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}
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@Override
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public String getSignatureForState(int i)
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{
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return goalStates.get(i) ? "!" : " ";
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}
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/** Returns a textual representation of this acceptance condition. */
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@Override
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public String toString()
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{
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return goalStates.toString();
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}
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@Override
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public String getSizeStatistics()
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{
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return goalStates.cardinality()+" goal states";
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}
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@Override
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public AcceptanceType getType()
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{
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return AcceptanceType.REACH;
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}
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@Override
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public String getTypeAbbreviated()
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{
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return "F";
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}
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@Override
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public String getTypeName()
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{
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return "Finite";
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}
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}
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