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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.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import org.eclipse.core.runtime.Platform;
import org.eclipse.etrice.core.fsm.fSM.AbstractInterfaceItem;
import org.eclipse.etrice.core.fsm.fSM.InSemanticsRule;
import org.eclipse.etrice.core.fsm.fSM.ProtocolSemantics;
import org.eclipse.etrice.core.fsm.fSM.SemanticsRule;
import org.eclipse.etrice.core.genmodel.fsm.fsmgen.ExpandedModelComponent;
public class ActiveRules {
private HashMap<AbstractInterfaceItem, List<SemanticsRule>> rules;
private static boolean traceRules = false;
private static int traceLevel = 0;
// HOWTO: use debug options to configure tracing (see also the .options file in the plug-in)
static {
if (Activator.getDefault().isDebugging()) {
String value = Platform
.getDebugOption("org.eclipse.etrice.abstractexec.behavior/trace/rules");
if (value != null && value.equalsIgnoreCase(Boolean.toString(true))) {
traceRules = true;
}
value = Platform
.getDebugOption("org.eclipse.etrice.abstractexec.behavior/trace/rules/level");
if (value != null) {
traceLevel = Integer.parseInt(value);
}
}
}
// private static final int TRACE_RESULT = 1;
private static final int TRACE_DETAILS = 2;
public ActiveRules() {
rules = new HashMap<AbstractInterfaceItem, List<SemanticsRule>>();
}
private ActiveRules(HashMap<AbstractInterfaceItem, List<SemanticsRule>> r) {
rules = r;
}
public Set<AbstractInterfaceItem> getPortList() {
return rules.keySet();
}
public List<SemanticsRule> getRulesForPort(AbstractInterfaceItem port) {
return rules.get(port);
}
// checks for currently active rules against a message list and modifies the
// rules which can be merged with the destination node
public List<HandledMessage> consumeMessages(List<HandledMessage> msgList) {
List<HandledMessage> wrongMsgList = new ArrayList<HandledMessage>();
for (HandledMessage msg : msgList) {
List<SemanticsRule> localRules = rules.get(msg.getIfitem());
if (localRules != null) {
SemanticsRule match = null;
for (SemanticsRule rule : localRules) {
if (rule.getMsg() == msg.getMsg()) {
match = rule;
break;
}
}
if (match != null) {
if (traceRules && traceLevel >= TRACE_DETAILS)
System.out.println(" found match for "
+ msg.getMsg().getName());
// discard all alternatives
localRules.clear();
if (match.getFollowUps().isEmpty()) {
// all rules of this branch consumed
// restart at root of semantic rules
ProtocolSemantics semantics = msg.getIfitem().getSemantics();
localRules.addAll(semantics.getRules());
}
else {
// and add all follow ups
localRules.addAll(match.getFollowUps());
}
} else {
// TODO: issue a warning?
wrongMsgList.add(msg);
}
}
}
return wrongMsgList;
}
// merges the rules with the destination active rules
public boolean merge(ActiveRules ar) {
boolean added_at_least_one = false;
for (Entry<AbstractInterfaceItem, List<SemanticsRule>> entry : ar.rules
.entrySet()) {
for (SemanticsRule rule : entry.getValue()) {
AbstractInterfaceItem ifitem = entry.getKey();
if (rules.containsKey(ifitem)) {
if (!rules.get(ifitem).contains(rule)) {
rules.get(ifitem).add(rule);
added_at_least_one = true;
}
} else {
List<SemanticsRule> tempList = new ArrayList<SemanticsRule>();
tempList.add(rule);
rules.put(ifitem, tempList);
added_at_least_one = true;
}
}
}
if (traceRules && traceLevel >= TRACE_DETAILS)
System.out.println(" merge changed rules");
return added_at_least_one;
}
public ActiveRules createCopy() {
HashMap<AbstractInterfaceItem, List<SemanticsRule>> newRules = new HashMap<AbstractInterfaceItem, List<SemanticsRule>>();
for (AbstractInterfaceItem ifitem : rules.keySet()) {
newRules.put(ifitem,
new ArrayList<SemanticsRule>(rules.get(ifitem)));
}
return new ActiveRules(newRules);
}
public void buildInitLocalRules(ExpandedModelComponent xpAct) {
// HashMap<AbstractInterfaceItem, EList<SemanticsRule>> locals = new
// HashMap<AbstractInterfaceItem, EList<SemanticsRule>>();
List<AbstractInterfaceItem> portList = xpAct.getModelComponent().getAllAbstractInterfaceItems();
for (AbstractInterfaceItem ifitem : portList) {
if (ifitem.getSemantics()!=null) {
rules.put(ifitem, new ArrayList<SemanticsRule>(ifitem.getSemantics().getRules()));
}
}
}
public void print() {
for (AbstractInterfaceItem port : rules.keySet()) {
System.out.println(" Rules for Port " + port.getName() + ":");
for (SemanticsRule rule : rules.get(port)) {
printRule(rule, " ");
}
}
}
public void printRule(SemanticsRule rule, String indent) {
if (rule instanceof InSemanticsRule)
System.out.println(indent + "in: " + rule.getMsg().getName());
else
System.out.println(indent + "out: " + rule.getMsg().getName());
// recursion
for (SemanticsRule sr : rule.getFollowUps()) {
printRule(sr, indent + " ");
}
}
}
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