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94 lines
2.5 KiB
94 lines
2.5 KiB
//==============================================================================
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//
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// Copyright (c) 2002-
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// Authors:
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// * Dave Parker <d.a.parker@cs.bham.ac.uk> (University of Birmingham/Oxford)
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// * Aistis Simaitis <aistis.aimaitis@cs.ox.ac.uk> (University of Oxford)
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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 strat;
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import prism.PrismLog;
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/**
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* Classes to store memoryless deterministic (MD) strategies.
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*/
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public abstract class MDStrategy implements Strategy
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{
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/**
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* Current state of model
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*/
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protected int currentState = -1;
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/**
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* Get the number of states of the model associated with this strategy.
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*/
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public abstract int getNumStates();
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/**
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* Get the type of choice information stored for state s.
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*/
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public abstract Strategy.Choice getChoice(int s);
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/**
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* Get the index of the choice taken in state s.
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* The index is defined with respect to a particular model, stored locally.
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* Other possible values: -1 (unknown), -2 (arbitrary), -3 (unreachable)
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*/
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public abstract int getChoiceIndex(int s);
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/**
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* Get the action taken in state s.
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*/
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public abstract Object getChoiceAction(int s);
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// Methods for Strategy
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@Override
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public void initialise(int s)
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{
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currentState = s;
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}
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@Override
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public void update(Object action, int s)
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{
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currentState = s;
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}
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@Override
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public Object getChoiceAction()
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{
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return getChoiceAction(currentState);
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}
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@Override
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public void exportActions(PrismLog out)
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{
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int n = getNumStates();
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for (int s = 0; s < n; s++) {
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// Only print actions for reachable states
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if (getChoice(s) != Choice.UNREACHABLE)
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out.println(s + ":" + getChoiceAction(s));
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}
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}
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}
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