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/*******************************************************************************
* Copyright (c) 2012 Rohit Agrawal
* 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:
* Rohit Agrawal (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.abstractexec.behavior;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Set;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.EList;
import org.eclipse.etrice.abstractexec.behavior.util.AbstractExecutionUtil;
import org.eclipse.etrice.core.genmodel.etricegen.ActiveTrigger;
import org.eclipse.etrice.core.genmodel.etricegen.ExpandedActorClass;
import org.eclipse.etrice.core.room.InitialTransition;
import org.eclipse.etrice.core.room.State;
import org.eclipse.etrice.core.room.StateGraph;
import org.eclipse.etrice.core.room.StateGraphItem;
import org.eclipse.etrice.core.room.StateGraphNode;
import org.eclipse.etrice.core.room.Transition;
public class SemanticsCheck {
private Queue<StateGraphNode> queue;
private Set<StateGraphNode> visited;
private ExpandedActorClass xpAct;
private HashMap<StateGraphItem, ActiveRules> mapToRules = new HashMap<StateGraphItem, ActiveRules>();
private ActionCodeAnalyzer codeAnalyzer;
private HashMap<StateGraphItem, List<HandledMessage>> mapToWarnings = new HashMap<StateGraphItem, List<HandledMessage>>();
private static boolean traceChecks = false;
private static int traceLevel = 0;
static {
if (Activator.getDefault().isDebugging()) {
String value = Platform.getDebugOption("org.eclipse.etrice.abstractexec.behavior/trace/checks");
if (value != null && value.equalsIgnoreCase(Boolean.toString(true))) {
traceChecks = true;
}
value = Platform.getDebugOption("org.eclipse.etrice.abstractexec.behavior/trace/checks/level");
if (value != null) {
traceLevel = Integer.parseInt(value);
}
}
}
private static final int TRACE_RESULT = 1;
private static final int TRACE_DETAILS = 2;
public SemanticsCheck(ExpandedActorClass xpac) {
queue = new LinkedList<StateGraphNode>();
xpAct = xpac;
visited = new HashSet<StateGraphNode>();
codeAnalyzer = new ActionCodeAnalyzer(xpac.getActorClass());
}
public void checkSemantics() {
if (traceChecks)
System.out.println("checkSemantics: check of ActorClass "+xpAct.getActorClass().getName());
StateGraph graph = xpAct.getStateMachine();
ActiveRules localRules = new ActiveRules();
localRules.buildInitLocalRules(xpAct);
addStartingPoints(graph, localRules);
doTraversal();
if (traceChecks) {
if (traceLevel>=TRACE_RESULT)
printRules();
System.out.println("checkSemantics: done with check of ActorClass "+xpAct.getActorClass().getName());
}
}
private void addStartingPoints(StateGraph graph, ActiveRules localRules) {
EList<Transition> transitions = graph.getTransitions();
for (Transition trans : transitions)
if (trans instanceof InitialTransition) {
StateGraphNode cur = AbstractExecutionUtil.getInstance().getRoomHelpers().getNode(trans.getTo());
List<HandledMessage> msgList = codeAnalyzer.analyze(trans.getAction());
if (cur instanceof State) {
msgList.addAll(codeAnalyzer.analyze(((State) cur).getEntryCode()));
}
List<HandledMessage> wrongMsgList = localRules.consumeMessages(msgList);
addToWarning(trans, wrongMsgList);
boolean rulesChanged = false;
if (mapToRules.containsKey(cur)) {
rulesChanged = mapToRules.get(cur).merge(localRules);
} else {
mapToRules.put(cur, localRules);
rulesChanged = true;
}
if (!visited.contains(cur) || rulesChanged)
queue.add(cur);
break;
}
}
private void doTraversal() {
while (!queue.isEmpty()) {
Visit(queue.poll());
}
}
private void Visit(StateGraphNode node) {
visited.add(node);
if (node instanceof State) {
State st = (State) node;
if (AbstractExecutionUtil.getInstance().getRoomHelpers().hasDirectSubStructure(st)) {
addStartingPoints(st.getSubgraph(), mapToRules.get(st));
}
else {
for (ActiveTrigger trigger : xpAct.getActiveTriggers(st)) {
if (traceChecks && traceLevel>=TRACE_DETAILS) {
System.out.println(" Currently visiting: " + st.getName());
System.out.println(" Trigger: " + trigger.getMsg().getName());
}
for (Transition trans : trigger.getTransitions()) {
StateGraphNode target = AbstractExecutionUtil.getInstance().getRoomHelpers().getNode(trans.getTo());
List<HandledMessage> msgList = new LinkedList<HandledMessage>();
// create a list of codes here in the order
// trigger, exit, action, entry
msgList.add(new HandledMessage(trigger.getIfitem(), trigger.getMsg(), trigger));
StateGraph triggerContext = (StateGraph) trans.eContainer();
State exitCalled = st;
while (true) {
// this is where all the exit code is added
msgList.addAll(codeAnalyzer.analyze(exitCalled.getExitCode()));
if (exitCalled.eContainer() == triggerContext)
break;
exitCalled = (State) exitCalled.eContainer().eContainer();
}
msgList.addAll(codeAnalyzer.analyze(trans.getAction()));
if (target instanceof State) {
msgList.addAll(codeAnalyzer.analyze(((State) target).getEntryCode()));
}
ActiveRules tempRule = mapToRules.get(node).createCopy();
if (traceChecks && traceLevel>=TRACE_DETAILS) {
System.out.println(" Messages in msglist before consuming: ");
for (HandledMessage msg : msgList) {
System.out.println(" Msg: "+ msg.getMsg().getName());
}
}
if (traceChecks && traceLevel>=TRACE_DETAILS) {
System.out.println(" rules before consuming message list : ");
printRules();
}
List<HandledMessage> wrongMsgList = tempRule.consumeMessages(msgList);
addToWarning(node, wrongMsgList);
if (traceChecks && traceLevel>=TRACE_DETAILS)
System.out.println(" Messages consumed");
addAndMergeRules(target, tempRule);
if (traceChecks && traceLevel>=TRACE_DETAILS) {
System.out.println(" rules after consuming and merging message list : ");
printRules();
}
}
}
}
} else {
/*
* If the current node is an Entry/Exit/Transition/Choice pt , then
* only the action code in the outgoing transition needs to be
* considered For this, a copy of the ActiveRules of the current
* node is created and is checked against each outgoing transition
* for Rule changes If there is any rule change or if the
* destination state hasn't been visited then the destination rules
* are merged with the current rules and destination node is added
* to the current queue.
*/
for (Transition trans : xpAct.getOutgoingTransitions(node)) {
ActiveRules tempRule = mapToRules.get(node).createCopy();
List<HandledMessage> msgList = codeAnalyzer.analyze(trans.getAction());
StateGraphNode target = AbstractExecutionUtil.getInstance().getRoomHelpers().getNode(trans.getTo());
if (target instanceof State) {
msgList.addAll(codeAnalyzer.analyze(((State) target).getEntryCode()));
}
List<HandledMessage> wrongMsgList = tempRule.consumeMessages(msgList);
addToWarning(node, wrongMsgList);
addAndMergeRules(target, tempRule);
}
}
}
private void addToWarning(StateGraphItem item,
List<HandledMessage> wrongMsgList) {
if (mapToWarnings.containsKey(item)) {
mapToWarnings.get(item).addAll(wrongMsgList);
} else {
mapToWarnings.put(item, wrongMsgList);
}
}
private void addAndMergeRules(StateGraphNode target, ActiveRules tempRule) {
boolean rulesChanged = false;
if (mapToRules.containsKey(target)) {
rulesChanged = mapToRules.get(target).merge(tempRule);
} else {
mapToRules.put(target, tempRule);
rulesChanged = true;
}
if (!visited.contains(target) || rulesChanged) {
queue.add(target);
}
}
public void printRules() {
System.out.println(" Current Rules: ");
System.out.println(" MapToRules size: " + this.mapToRules.size());
for (StateGraphItem item : this.mapToRules.keySet()) {
System.out.println(" Rules for " + item.getName() + " : ");
mapToRules.get(item).print();
}
}
public ActiveRules getActiveRules(StateGraphItem item) {
return mapToRules.get(item);
}
public List<HandledMessage> getWarningMsg (StateGraphItem item)
{
return mapToWarnings.get(item);
}
}
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