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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package com.c2kernel.lifecycle.instance.stateMachine;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import com.c2kernel.common.AccessRightsException;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.InvalidTransitionException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.lifecycle.instance.Activity;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.utils.DescriptionObject;
import com.c2kernel.utils.Logger;
public class StateMachine implements DescriptionObject
{
public String name;
public int version;
private ArrayList<State> states;
private ArrayList<Transition> transitions;
private final HashMap<Integer, State> stateCodes;
private final HashMap<Integer, Transition> transitionCodes;
State initialState;
int initialStateCode;
boolean isCoherent = false;
public StateMachine() {
states = new ArrayList<State>();
transitions = new ArrayList<Transition>();
stateCodes = new HashMap<Integer, State>();
transitionCodes = new HashMap<Integer, Transition>();
}
public void setStates(ArrayList<State> newStates) {
this.states = newStates;
validate();
}
public void setTransitions(ArrayList<Transition> newTransitions) {
this.transitions = newTransitions;
validate();
}
public void validate() {
stateCodes.clear();
transitionCodes.clear();
isCoherent = true;
for (State state : states) {
Logger.debug(6, "State "+state.id+": "+state.name);
stateCodes.put(state.getId(), state);
}
if (stateCodes.containsKey(initialStateCode))
initialState = stateCodes.get(initialStateCode);
else
isCoherent = false;
for (Transition trans : transitions) {
Logger.debug(6, "Transition "+trans.id+": "+trans.name);
transitionCodes.put(trans.getId(), trans);
isCoherent = isCoherent && trans.resolveStates(stateCodes);
}
}
public ArrayList<State> getStates() {
return states;
}
public ArrayList<Transition> getTransitions() {
return transitions;
}
public State getInitialState() {
return initialState;
}
public void setInitialState(State initialState) {
this.initialState = initialState;
initialStateCode = initialState.getId();
}
public int getInitialStateCode() {
return initialStateCode;
}
public void setInitialStateCode(int initialStateCode) {
this.initialStateCode = initialStateCode;
initialState = stateCodes.get(initialStateCode);
if (initialState == null) isCoherent = false;
}
@Override
public String getName() {
return name;
}
@Override
public int getVersion() {
return version;
}
@Override
public void setName(String name) {
this.name = name;
}
@Override
public void setVersion(int version) {
this.version = version;
}
public Transition getTransition(int transitionID) {
return transitionCodes.get(transitionID);
}
public State getState(int stateID) {
return stateCodes.get(stateID);
}
public Map<Transition, String> getPossibleTransitions(Activity act, AgentPath agent) throws ObjectNotFoundException, InvalidDataException {
HashMap<Transition, String> returnList = new HashMap<Transition, String>();
State currentState = getState(act.getState());
for (Integer transCode : currentState.getPossibleTransitionIds()) {
Transition possTrans = currentState.getPossibleTransitions().get(transCode);
try {
String role = possTrans.getPerformingRole(act, agent);
returnList.put(possTrans, role);
} catch (AccessRightsException ex) {
if (Logger.doLog(5))
Logger.msg(5, "Transition '"+possTrans+"' not possible for "+agent.getAgentName()+": "+ex.getMessage());
}
}
return returnList;
}
public State traverse(Activity act, Transition transition, AgentPath agent) throws InvalidTransitionException, AccessRightsException, ObjectNotFoundException, InvalidDataException {
State currentState = getState(act.getState());
if (transition.originState.equals(currentState)) {
transition.getPerformingRole(act, agent);
return transition.targetState;
}
else
throw new InvalidTransitionException("Transition '"+transition.getName()+"' not valid from state '"+currentState.getName(), "");
}
public boolean isCoherent() {
return isCoherent;
}
}
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