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/*******************************************************************************
* Copyright (c) 2010-2016, Andras Szabolcs Nagy 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 org.eclipse.viatra.dse.designspace.api;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
public class DesignSpace implements IDesignSpace {
Set<Object> statesView;
Set<Object> rootStates;
Set<Object> rootStatesView;
Map<Object, List<Object>> statesAndActivations;
Random random = new Random();
public DesignSpace() {
rootStates = new HashSet<>();
rootStatesView = Collections.unmodifiableSet(rootStates);
statesAndActivations = new HashMap<>();
statesView = statesAndActivations.keySet();
}
@Override
public synchronized Collection<Object> getStates() {
return statesView;
}
@Override
public synchronized Collection<Object> getRoots() {
return rootStatesView;
}
@Override
public synchronized void addState(Object sourceStateId, Object firedActivationId, Object newStateId) {
List<Object> activationIds = statesAndActivations.get(newStateId);
if (activationIds == null) {
activationIds = new ArrayList<Object>();
statesAndActivations.put(newStateId, activationIds);
if (sourceStateId == null) {
rootStates.add(newStateId);
return;
}
}
activationIds = statesAndActivations.get(sourceStateId);
if (activationIds == null) {
activationIds = new ArrayList<Object>();
activationIds.add(firedActivationId);
statesAndActivations.put(sourceStateId, activationIds);
} else {
activationIds.add(firedActivationId);
}
}
public synchronized boolean isTraversed(Object stateId) {
return statesAndActivations.containsKey(stateId);
}
@Override
public synchronized Collection<Object> getActivationIds(Object stateId) {
return statesAndActivations.get(stateId);
}
@Override
public synchronized Object getRandomActivationId(Object stateId) {
List<Object> activations = statesAndActivations.get(stateId);
int index = random.nextInt(activations.size());
return activations.get(index);
}
@Override
public synchronized long getNumberOfStates() {
return statesAndActivations.size();
}
@Override
public synchronized long getNumberOfTransitions() {
int numberOfTransitions = 0;
for (List<Object> activations : statesAndActivations.values()) {
numberOfTransitions += activations.size();
}
return numberOfTransitions;
}
}
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