/// <summary>
/// Perform additional checks based on the parameter types
/// </summary>
/// <param name="root">The element on which the errors should be reported</param>
/// <param name="context">The evaluation context</param>
/// <param name="actualParameters">The parameters applied to this function call</param>
public override void AdditionalChecks(ModelElement root, InterpretationContext context,
Dictionary <string, Expression> actualParameters)
{
CheckFunctionalParameter(root, context, actualParameters[First.Name], 2);
CheckFunctionalParameter(root, context, actualParameters[Second.Name], 0);
Function function1 = actualParameters[First.Name].GetExpressionType() as Function;
Function function2 = actualParameters[Second.Name].GetExpressionType() as Function;
if (function1 != null && function2 != null)
{
if (function1.FormalParameters.Count == 2 && function2.FormalParameters.Count == 0)
{
Parameter p1 = (Parameter)function1.FormalParameters[0];
Parameter p2 = (Parameter)function1.FormalParameters[1];
if (p1.Type != EFSSystem.DoubleType || p2.Type != EFSSystem.DoubleType)
{
root.AddError("The formal parameters for the first function are not double");
}
}
if (function1.ReturnType != function2.ReturnType && function1.ReturnType != EFSSystem.DoubleType &&
function2.ReturnType != EFSSystem.DoubleType)
{
root.AddError("The return values for the functions provided as parameter are not the same");
}
}
}
/// <summary>
/// Provides the surface of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the surface</param>
/// <param name="explain"></param>
/// <returns></returns>
public override Surface CreateSurface(InterpretationContext context, ExplanationPart explain)
{
Surface retVal = null;
IValue firstValue = context.FindOnStack(First).Value;
IValue secondValue = context.FindOnStack(Second).Value;
Surface firstSurface = createSurfaceForValue(context, firstValue, explain);
if (firstSurface != null)
{
Surface secondSurface = createSurfaceForValue(context, secondValue, explain);
if (secondSurface != null)
{
retVal = firstSurface.Min(secondSurface);
}
else
{
Second.AddError("Cannot create surface for " + Second);
}
}
else
{
First.AddError("Cannot create surface for " + First);
}
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
Function function = (Function)acceptor.getFactory().createFunction();
function.Name = "MINSURFACE (" + getName(First) + ", " + getName(Second) + ")";
function.Enclosing = EFSSystem;
function.Surface = CreateSurface(context, explain);
Parameter parameterX = (Parameter)acceptor.getFactory().createParameter();
parameterX.Name = "X";
parameterX.Type = EFSSystem.DoubleType;
function.appendParameters(parameterX);
Parameter parameterY = (Parameter)acceptor.getFactory().createParameter();
parameterY.Name = "Y";
parameterY.Type = EFSSystem.DoubleType;
function.appendParameters(parameterY);
function.ReturnType = EFSSystem.DoubleType;
retVal = function;
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Applies a rule defined in a procedure
/// </summary>
/// <param name="rule"></param>
/// <param name="changes"></param>
/// <param name="ctxt"></param>
/// <param name="explanation"></param>
/// <param name="runner"></param>
private void ApplyRule(Rule rule, ChangeList changes, InterpretationContext ctxt, ExplanationPart explanation,
Runner runner)
{
foreach (RuleCondition condition in rule.RuleConditions)
{
ExplanationPart conditionExplanation = ExplanationPart.CreateSubExplanation(explanation, condition);
if (condition.EvaluatePreConditions(ctxt, conditionExplanation, runner))
{
ExplanationPart.SetNamable(conditionExplanation, EfsSystem.Instance.BoolType.True);
foreach (Action action in condition.Actions)
{
action.GetChanges(ctxt, changes, conditionExplanation, true, runner);
}
foreach (Rule subRule in condition.SubRules)
{
ApplyRule(subRule, changes, ctxt, conditionExplanation, runner);
}
break;
}
else
{
ExplanationPart.SetNamable(conditionExplanation, EfsSystem.Instance.BoolType.False);
}
}
}
/// <summary>
/// Provides the graph of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the graph</param>
/// <param name="parameter"></param>
/// <param name="explain"></param>
/// <returns></returns>
public override Graph CreateGraph(InterpretationContext context, Parameter parameter, ExplanationPart explain)
{
Graph retVal = null;
Graph graph = createGraphForValue(context, context.FindOnStack(Function).Value, explain, parameter);
if (graph != null)
{
double speed = GetDoubleValue(context.FindOnStack(Speed).Value);
double solutionX = graph.SolutionX(speed);
if (solutionX == double.MaxValue)
{
// No value found, return Unknown
Range distanceType = (Range)EFSSystem.FindByFullName("Default.BaseTypes.Distance");
EnumValue unknownDistance = distanceType.findEnumValue("Unknown");
retVal = Graph.createGraph(distanceType.getValueAsDouble(unknownDistance));
}
else
{
// Create the graph for this solution
retVal = Graph.createGraph(solutionX);
}
}
else
{
Function.AddError("Cannot create graph for " + Function);
}
return(retVal);
}
/// <summary>
/// Provides the surface of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the surface</param>
/// <param name="explain"></param>
/// <returns></returns>
public override Surface CreateSurface(InterpretationContext context, ExplanationPart explain)
{
Surface retVal = null;
Surface defaultSurface = createSurfaceForValue(context, context.FindOnStack(DefaultFunction).Value, explain);
if (defaultSurface != null)
{
Surface overrideSurface = createSurfaceForValue(context, context.FindOnStack(OverrideFunction).Value,
explain);
if (overrideSurface != null)
{
retVal = defaultSurface.Override(overrideSurface);
}
else
{
OverrideFunction.AddError("Cannot create graph for OVERRIDE argument");
}
}
else
{
DefaultFunction.AddError("Cannot create graph for DEFAULT argument");
}
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal = null;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
ListValue value = context.FindOnStack(Collection) as ListValue;
if (value != null)
{
Collection collectionType = value.Type as Collection;
if (collectionType != null && collectionType.Type != null)
{
Type elementType = collectionType.Type;
if (value.Val.Count >= collectionType.getMaxSize())
{
AddError("Cannot allocate element in list : list full");
}
else
{
retVal = elementType.DefaultValue;
value.Val.Add(retVal);
}
}
}
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
int count = 0;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
count += 1;
}
}
NextIteration();
}
EndIteration(context, token);
}
return(new Values.IntValue(EFSSystem.IntegerType, count));;
}
/// <summary>
/// Perform additional checks based on the parameter types
/// </summary>
/// <param name="root">The element on which the errors should be reported</param>
/// <param name="context">The evaluation context</param>
/// <param name="actualParameters">The parameters applied to this function call</param>
public override void AdditionalChecks(ModelElement root, InterpretationContext context,
Dictionary <string, Expression> actualParameters)
{
CheckFunctionalParameter(root, context, actualParameters[Target.Name], 1);
CheckFunctionalParameter(root, context, actualParameters[DecelerationFactor.Name], 2);
CheckFunctionalParameter(root, context, actualParameters[EndSpeed.Name], 3);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal = null;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
Collection collectionType =
(Collection)
EFSSystem.FindType(
OverallNameSpaceFinder.INSTANCE.findByName(EFSSystem.Dictionaries[0],
"Default"),
"TargetsCol");
ListValue collection = new ListValue(collectionType, new List <IValue>());
Function function = context.FindOnStack(Targets).Value as Function;
if (function != null && !function.Name.Equals("EMPTY"))
{
Graph graph1 = createGraphForValue(context, function, explain);
ComputeTargets(graph1.Function, collection);
}
context.LocalScope.PopContext(token);
retVal = collection;
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal = null;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
StructureValue startDate = context.FindOnStack(StartDate).Value as StructureValue;
if (startDate != null)
{
int year = GetIntValue(startDate, "Year");
int month = GetIntValue(startDate, "Month");
int day = GetIntValue(startDate, "Day");
int hour = GetIntValue(startDate, "Hour");
int minute = GetIntValue(startDate, "Minute");
int second = GetIntValue(startDate, "Second");
int tts = GetIntValue(startDate, "TTS");
DoubleValue addedTime = context.FindOnStack(Increment).Value as DoubleValue;
if (addedTime != null)
{
DateTime start = new DateTime(year, month, day, hour, minute, second, tts);
DateTime currentTime = start.AddSeconds(addedTime.Val);
retVal = GetEfsDate(currentTime, startDate.Type as Structure);
}
}
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Provides the graph of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the graph</param>
/// <param name="parameter"></param>
/// <param name="explain"></param>
/// <returns></returns>
public override Graph CreateGraph(InterpretationContext context, Parameter parameter, ExplanationPart explain)
{
Graph retVal = null;
Graph firstGraph = createGraphForValue(context, context.FindOnStack(First).Value, explain);
if (firstGraph != null)
{
Graph secondGraph = createGraphForValue(context, context.FindOnStack(Second).Value, explain);
if (secondGraph != null)
{
retVal = firstGraph.Min(secondGraph) as Graph;
}
else
{
Second.AddError("Cannot create graph for " + Second);
}
}
else
{
First.AddError("Cannot create graph for " + First);
}
return(retVal);
}
public override void GetChanges(InterpretationContext context, ChangeList changes,
ExplanationPart explanation, bool apply, Runner runner)
{
Change change = new Change(Variable, Variable.Value, Value);
changes.Add(change, apply, runner);
}
IComparable /*?*/[] ConvertTermArgumentsToMethodArguments(InterpretationContext c, Sequence <Term> termArguments, out IComparable thisArg)
{
int nMethodArgs = this.method.parameterInfos.Length;
IComparable /*?*/[] methodArgs = new IComparable[nMethodArgs];
thisArg = null;
int k = 0;
int nParametersUsed = this.inputArgumentIndices.Length;
foreach (Term arg in termArguments)
{
if (k >= nParametersUsed)
{
break;
}
int methodArgIndex = this.inputArgumentIndices[k++];
IComparable argInterpretation = c.InterpretTerm(arg); // convert from term to .NET runtime object
if (-1 == methodArgIndex)
{
thisArg = argInterpretation;
}
else if (methodArgIndex >= 0)
{
methodArgs[methodArgIndex] = argInterpretation;
}
}
return(methodArgs);
}
/// <summary>
/// Creates a list of changes to be applied on the system
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list of changes to be updated</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
/// <returns>The list to fill with the changes</returns>
public virtual void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
if (!DeActivated)
{
long start = Environment.TickCount;
try
{
if (Statement != null)
{
Statement.GetChanges(context, changes, explanation, apply, runner);
}
else
{
AddError("Invalid actions statement");
}
}
catch (Exception e)
{
AddException(e);
}
long stop = Environment.TickCount;
long span = (stop - start);
if (RuleCondition != null && RuleCondition.EnclosingRule != null)
{
// Rule execution execution time (as opposed to guard evaluation)
RuleCondition.EnclosingRule.ExecutionTimeInMilli += span;
RuleCondition.EnclosingRule.ExecutionCount += 1;
}
}
}
/// <summary>
/// Expression of the case
/// </summary>
/// <param name="context"></param>
/// <param name="explain"></param>
public bool EvaluatePreConditions(InterpretationContext context, ExplanationPart explain)
{
bool retVal = true;
foreach (PreCondition preCondition in PreConditions)
{
Expression expression = preCondition.Expression;
BoolValue value = expression.GetValue(context, explain) as BoolValue;
if (value != null)
{
retVal = retVal && value.Val;
}
else
{
retVal = false;
}
if (!retVal)
{
break;
}
}
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = EFSSystem.EmptyValue;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
for (int i = value.Val.Count - 1; i >= 0; i--)
{
Values.IValue v = value.Val[i];
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
retVal = IteratorVariable.Value;
break;
}
}
NextIteration();
}
EndIteration(context, token);
}
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.ListValue retVal = null;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = new Values.ListValue((Types.Collection)GetExpressionType(), new List <Values.IValue>());
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
retVal.Val.Add(IteratorExpression.GetValue(context));
}
}
NextIteration();
}
EndIteration(context, token);
}
return(retVal);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="context"></param>
/// <param name="statement"></param>
/// <param name="variable"></param>
/// <param name="explanation"></param>
public InsertInListChange(InterpretationContext context, InsertStatement statement, IVariable variable, ExplanationPart explanation)
: base(variable, null, null)
{
Context = context;
Statement = statement;
Explanation = explanation;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = EFSSystem.BoolType.True;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
if (Condition != null)
{
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (!conditionSatisfied(context))
{
retVal = EFSSystem.BoolType.False;
break;
}
}
NextIteration();
}
}
EndIteration(context, token);
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = EFSSystem.EmptyValue;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
for (int i = value.Val.Count - 1; i >= 0; i--)
{
Values.IValue v = value.Val[i];
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
retVal = IteratorVariable.Value;
break;
}
}
NextIteration();
}
EndIteration(context, token);
}
return retVal;
}
/// <summary>
/// Expression of the case
/// </summary>
public bool EvaluatePreConditions(InterpretationContext context)
{
bool retVal = true;
foreach (DataDictionary.Rules.PreCondition preCondition in PreConditions)
{
Interpreter.Expression expression = preCondition.ExpressionTree;
Values.BoolValue value = expression.GetValue(context) as Values.BoolValue;
if (value != null)
{
retVal = retVal && value.Val;
}
else
{
retVal = false;
}
if (!retVal)
{
break;
}
}
return(retVal);
}
internal override IEnumerable <string> GetEnablingConditionDescriptions(InterpretationContext c, Sequence <Term> args, bool returnFailures)
{
IComparable /*?*/ thisArg = null;
IComparable[] methodArgs = ConvertTermArgumentsToMethodArguments(c, args, out thisArg);
return(this.method.GetEnablingConditionDescriptions(c, thisArg, methodArgs, returnFailures));
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
int count = 0;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
count += 1;
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return(new IntValue(EfsSystem.Instance.IntegerType, count));
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = EfsSystem.Instance.BoolType.True;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
if (Condition != null)
{
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (!ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
retVal = EfsSystem.Instance.BoolType.False;
break;
}
}
NextIteration();
}
}
EndIteration(context, explain, token);
}
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = EFSSystem.BoolType.True;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
if (Condition != null)
{
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (!conditionSatisfied(context))
{
retVal = EFSSystem.BoolType.False;
break;
}
}
NextIteration();
}
}
EndIteration(context, token);
}
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
ListValue retVal = null;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = new ListValue((Collection)GetExpressionType(), new List <IValue>());
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
retVal.Val.Add(v);
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
Function function = (Function)acceptor.getFactory().createFunction();
function.Name = "AddIncrement ( Function => " + getName(Function) + ", Value => " + getName(Increment) + ")";
function.Enclosing = EFSSystem;
Parameter parameter = (Parameter)acceptor.getFactory().createParameter();
parameter.Name = "X";
parameter.Type = EFSSystem.DoubleType;
function.appendParameters(parameter);
function.ReturnType = EFSSystem.DoubleType;
function.Graph = CreateGraph(context, parameter, explain);
retVal = function;
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Edits a value expression and provides the edited expression after user has performed his changes
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
private Expression EditExpression(Expression expression)
{
Expression retVal = expression;
if (expression != null)
{
ModelElement.DontRaiseError(() =>
{
InterpretationContext context = new InterpretationContext(Model)
{
UseDefaultValue = false
};
IValue value = expression.GetExpressionValue(context, null);
if (value != null)
{
StructureEditor.Window window = new StructureEditor.Window();
window.SetModel(value);
window.ShowDialog();
string newExpression = value.ToExpressionWithDefault();
const bool doSemanticalAnalysis = true;
const bool silent = true;
retVal = new Parser().Expression(expression.Root, newExpression,
AllMatches.INSTANCE, doSemanticalAnalysis, null, silent);
}
});
}
return(retVal);
}
/// <summary>
/// Provides the graph of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the graph</param>
/// <param name="parameter"></param>
/// <param name="explain"></param>
/// <returns></returns>
public override Graph CreateGraph(InterpretationContext context, Parameter parameter, ExplanationPart explain)
{
Graph retVal = null;
Graph graph = null;
Function function = context.FindOnStack(Function).Value as Function;
if (function != null)
{
int token = context.LocalScope.PushContext();
Parameter p = (Parameter)function.FormalParameters[0];
context.LocalScope.SetGraphParameter(p);
graph = createGraphForValue(context, function, explain, p);
context.LocalScope.PopContext(token);
}
if (graph != null)
{
Function increment = context.FindOnStack(Increment).Value as Function;
retVal = graph.AddIncrement(context, increment, explain);
}
else
{
Function.AddError("Cannot create graph for " + Function);
}
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
ListValue retVal = null;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
StringValue value = context.FindOnStack(Value).Value as StringValue;
if (value != null)
{
retVal = new ListValue(EfsSystem.Instance.StringCollection, new List <IValue>());
foreach (char c in value.Val)
{
StringValue character = new StringValue(EfsSystem.Instance.StringType, c.ToString(CultureInfo.InvariantCulture));
retVal.Val.Add(character);
}
}
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Adds a new function to this graph
/// </summary>
/// <param name="function"></param>
private void AddFunction(Function function)
{
if (function != null)
{
InterpretationContext context = new InterpretationContext(function);
if (function.FormalParameters.Count == 1)
{
Parameter parameter = (Parameter)function.FormalParameters[0];
Graph graph = function.createGraph(context, parameter);
if (graph != null)
{
Functions.Add(function);
Refresh();
}
}
else if (function.FormalParameters.Count == 2)
{
Surface surface = function.createSurface(context);
if (surface != null)
{
Functions.Add(function);
Refresh();
}
else
{
MessageBox.Show("Cannot add this function to the display view", "Cannot display function", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
}
/// <summary>
/// Indicates whether the condition is satisfied with the value provided
/// Hyp : the value of the iterator variable has been assigned before
/// </summary>
/// <returns></returns>
public bool conditionSatisfied(InterpretationContext context)
{
bool retVal = true;
if (Condition != null)
{
Values.BoolValue b = Condition.GetValue(context) as Values.BoolValue;
if (b == null)
{
retVal = false;
}
else
{
retVal = b.Val;
}
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
int count = 0;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
count += 1;
}
}
NextIteration();
}
EndIteration(context, token);
}
return new Values.IntValue(EFSSystem.IntegerType, count); ;
}
protected void Initialize()
{
string home = System.IO.Path.GetFullPath("../../../../");
context = InterpretationContext.StartInterpretation(home, null, null);
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
int index = context.LocalScope.PushContext();
context.LocalScope.setVariable(IteratorVariable);
IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
ListValue listValue = variable.Value.RightSide(variable, false, false) as ListValue;
variable.Value = listValue;
if (listValue != null)
{
ListValue newListValue = new ListValue(listValue);
int i = 0;
foreach (IValue current in newListValue.Val)
{
IteratorVariable.Value = current;
if (conditionSatisfied(context, explanation))
{
break;
}
i += 1;
}
if (i < newListValue.Val.Count)
{
IValue value = Value.GetValue(context, explanation);
if (value != null)
{
newListValue.Val[i] = value;
Change change = new Change(variable, variable.Value, newListValue);
changes.Add(change, apply, runner);
ExplanationPart.CreateSubExplanation(explanation, Root, change);
}
else
{
Root.AddError("Cannot find value for " + Value.ToString());
}
}
else
{
Root.AddError("Cannot find value in " + ListExpression.ToString() + " which satisfies " +
Condition.ToString());
}
}
else
{
Root.AddError("Variable " + ListExpression.ToString() + " does not contain a list value");
}
}
else
{
Root.AddError("Cannot find variable for " + ListExpression.ToString());
}
context.LocalScope.PopContext(index);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = null;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
context.LocalScope.setVariable(AccumulatorVariable);
Types.Type resultType = GetExpressionType();
if (resultType != null)
{
AccumulatorVariable.Value = resultType.getValue("0");
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
AccumulatorVariable.Value = Accumulator.GetValue(context);
}
}
NextIteration();
}
}
EndIteration(context, token);
retVal = AccumulatorVariable.Value;
}
return retVal;
}
/// <summary>
/// Provides the context on which function evaluation should be performed
/// </summary>
/// <param name="context"></param>
/// <param name="explain"></param>
/// <returns></returns>
private InterpretationContext getContext(InterpretationContext context, ExplanationPart explain)
{
InterpretationContext retVal = context;
DerefExpression deref = Call.Called as DerefExpression;
if (deref != null)
{
IValue value = deref.GetPrefixValue(context, deref.Arguments.Count - 1, explain) as IValue;
if (value != null)
{
retVal = new InterpretationContext(context, value);
}
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
ListValue retVal = null;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = new ListValue((Collection) GetExpressionType(), new List<IValue>());
List<IValue> range = new List<IValue>(value.Val);
foreach (IValue v in range)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
retVal.Val.Add(IteratorExpression.GetValue(context, explain));
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return retVal;
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
// Explain what happens in this statement
explanation = ExplanationPart.CreateSubExplanation(explanation, this);
IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
if (variable.Value != EfsSystem.Instance.EmptyValue)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
ListValue listValue = variable.Value.RightSide(variable, false, false) as ListValue;
variable.Value = listValue;
ExplanationPart.CreateSubExplanation(explanation, "Input data = ", listValue);
if (listValue != null)
{
int token = context.LocalScope.PushContext();
context.LocalScope.SetVariable(IteratorVariable);
bool elementFound = false;
bool matchingElementFound = false;
foreach (IValue value in listValue.Val)
{
if (value != EfsSystem.Instance.EmptyValue)
{
elementFound = true;
IteratorVariable.Value = value;
if (ConditionSatisfied(context, explanation))
{
matchingElementFound = true;
AppliedStatement.GetChanges(context, changes, explanation, apply, runner);
}
}
}
if (!elementFound)
{
ExplanationPart.CreateSubExplanation(explanation, "Empty collection");
}
else if (!matchingElementFound)
{
ExplanationPart.CreateSubExplanation(explanation, "No matching element found");
}
context.LocalScope.PopContext(token);
}
else
{
Root.AddError("List expression does not evaluate to a list value");
}
}
}
else
{
Root.AddError("Cannot find variable for " + ListExpression);
}
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation, bool apply)
{
Variables.IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
Values.ListValue listValue = variable.Value.RightSide(variable, false) as Values.ListValue;
variable.Value = listValue;
if (listValue != null)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setVariable(IteratorVariable);
foreach (Values.IValue value in listValue.Val)
{
if (value != EFSSystem.EmptyValue)
{
IteratorVariable.Value = value;
if (conditionSatisfied(context))
{
Call.GetChanges(context, changes, explanation, apply);
}
}
}
context.LocalScope.PopContext(token);
}
else
{
Root.AddError("List expression does not evaluate to a list value");
}
}
else
{
Root.AddError("Cannot find variable for " + ListExpression.ToString());
}
}
/// <summary>
/// Creates the graph associated to this expression, when the given parameter ranges over the X axis
/// </summary>
/// <param name="context">The interpretation context</param>
/// <param name="parameter">The parameters of *the enclosing function* for which the graph should be created</param>
/// <returns></returns>
public override Functions.Graph createGraph(InterpretationContext context, Parameter parameter)
{
Functions.Graph retVal = base.createGraph(context, parameter);
Functions.Graph graph = InitialValue.createGraph(context, parameter);
if (graph != null)
{
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
AccumulatorVariable.Value = graph.Function;
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
AccumulatorVariable.Value = IteratorExpression.GetValue(context);
}
}
NextIteration();
}
Functions.Function function = AccumulatorVariable.Value as Functions.Function;
if (function != null)
{
retVal = function.Graph;
}
else
{
retVal = Functions.Function.createGraphForValue(AccumulatorVariable.Value);
}
EndIteration(context, token);
}
}
else
{
throw new Exception("Cannot create graph for initial value " + InitialValue.ToString());
}
return retVal;
}
/// <summary>
/// Provides the callable that is called by this expression
/// </summary>
/// <param name="namable"></param>
/// <returns></returns>
public override ICallable getCalled(InterpretationContext context)
{
ICallable retVal = null;
Functions.Function function = InitialValue.Ref as Functions.Function;
if (function == null)
{
function = InitialValue.getCalled(context) as Functions.Function;
}
if (function != null)
{
if (function.FormalParameters.Count == 1)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setGraphParameter((Parameter)function.FormalParameters[0]);
Functions.Graph graph = createGraph(context, (Parameter)function.FormalParameters[0]);
context.LocalScope.PopContext(token);
if (graph != null)
{
retVal = graph.Function;
}
}
else if (function.FormalParameters.Count == 2)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setSurfaceParameters((Parameter)function.FormalParameters[0], (Parameter)function.FormalParameters[1]);
Functions.Surface surface = createSurface(context, (Parameter)function.FormalParameters[0], (Parameter)function.FormalParameters[1]);
context.LocalScope.PopContext(token);
if (surface != null)
{
retVal = surface.Function;
}
}
else
{
AddError("Cannot evaluate REDUCE expression to a function");
}
}
else
{
AddError("Cannot evaluate REDUCE expression to a function");
}
return retVal;
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The changes performed by this statement</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public abstract void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner);
/// <summary>
/// Checks the statement for semantical errors
/// </summary>
public override void CheckStatement()
{
InterpretationContext context = new InterpretationContext(Root);
Types.Collection listExpressionType = ListExpression.GetExpressionType() as Types.Collection;
if (listExpressionType == null)
{
Root.AddError("Target does not references a list variable");
}
context.LocalScope.setVariable(IteratorVariable);
Call.CheckStatement(context);
}
/// <summary>
/// Indicates whether the condition is satisfied with the value provided
/// Hyp : the value of the iterator variable has been assigned before
/// </summary>
/// <param name="context"></param>
/// <param name="explain"></param>
/// <returns></returns>
public bool ConditionSatisfied(InterpretationContext context, ExplanationPart explain)
{
bool retVal = true;
if (Condition != null)
{
BoolValue b = Condition.GetExpressionValue(context, explain) as BoolValue;
ExplanationPart.CreateSubExplanation(explain, Condition, b);
if (b == null)
{
retVal = false;
}
else
{
retVal = b.Val;
}
}
return retVal;
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation, bool apply)
{
Variables.IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
Values.ListValue listValue = variable.Value.RightSide(variable, false) as Values.ListValue;
variable.Value = listValue;
if (listValue != null)
{
Values.ListValue newListValue = new Values.ListValue(listValue);
int i = 0;
foreach (Values.IValue current in newListValue.Val)
{
IteratorVariable.Value = current;
if (conditionSatisfied(context))
{
break;
}
i += 1;
}
if (i < newListValue.Val.Count)
{
Values.IValue value = Value.GetValue(context);
if (value != null)
{
newListValue.Val[i] = value;
Rules.Change change = new Rules.Change(variable, variable.Value, newListValue);
changes.Add(change, apply);
explanation.SubExplanations.Add(new ExplanationPart(Root, change));
}
else
{
Root.AddError("Cannot find value for " + Value.ToString());
}
}
else
{
Root.AddError("Cannot find value in " + ListExpression.ToString() + " which satisfies " + Condition.ToString());
}
}
else
{
Root.AddError("Variable " + ListExpression.ToString() + " does not contain a list value");
}
}
else
{
Root.AddError("Cannot find variable for " + ListExpression.ToString());
}
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
if (Call != null)
{
InterpretationContext ctxt = getContext(context, explanation);
Procedure procedure = Call.getProcedure(ctxt, explanation);
if (procedure != null)
{
ctxt.HasSideEffects = true;
// If the procedure has been defined in a structure,
// ensure that it is applied to an instance of that structure
Structure structure = procedure.Enclosing as Structure;
if (structure != null)
{
ITypedElement current = ctxt.Instance as ITypedElement;
while (current != null)
{
if (current.Type != structure)
{
IEnclosed enclosed = current as IEnclosed;
if (enclosed != null)
{
current = enclosed.Enclosing as ITypedElement;
}
else
{
current = null;
}
}
else
{
ctxt.Instance = current;
current = null;
}
}
}
ExplanationPart part = ExplanationPart.CreateSubExplanation(explanation, procedure);
if (ctxt.Instance is IVariable)
{
ExplanationPart.SetNamable(part, ctxt.Instance);
ExplanationPart instanceExplanation = ExplanationPart.CreateSubExplanation(part, "instance = ");
ExplanationPart.SetNamable(instanceExplanation, ctxt.Instance);
}
int token = ctxt.LocalScope.PushContext();
foreach (
KeyValuePair<Actual, IValue> pair in Call.AssignParameterValues(context, procedure, true, part))
{
ctxt.LocalScope.setVariable(pair.Key, pair.Value);
}
foreach (Rule rule in procedure.Rules)
{
ApplyRule(rule, changes, ctxt, part, runner);
}
ctxt.LocalScope.PopContext(token);
}
else
{
AddError("Cannot determine the called procedure for " + ToString());
}
}
else
{
AddError("Expression " + ToString() + " is not a valid procedure call");
}
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = null;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
context.LocalScope.SetVariable(AccumulatorVariable);
Type resultType = GetExpressionType();
if (resultType != null)
{
AccumulatorVariable.Value = resultType.getValue("0");
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
AccumulatorVariable.Value = Accumulator.GetValue(context, explain);
}
}
NextIteration();
}
}
EndIteration(context, explain, token);
retVal = AccumulatorVariable.Value;
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = null;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
context.LocalScope.setVariable(AccumulatorVariable);
AccumulatorVariable.Value = InitialValue.GetValue(context);
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
AccumulatorVariable.Value = IteratorExpression.GetValue(context);
}
}
NextIteration();
}
EndIteration(context, token);
retVal = AccumulatorVariable.Value;
}
else
{
AddError("Cannot evaluate list value " + ListExpression.ToString());
}
return retVal;
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
// Explain what happens in this statement
explanation = ExplanationPart.CreateSubExplanation(explanation, this);
IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
ListValue listValue = variable.Value.RightSide(variable, false, false) as ListValue;
variable.Value = listValue;
if (listValue != null)
{
ExplanationPart.CreateSubExplanation(explanation, "Input data = ", listValue);
IValue value = Value.GetExpressionValue(context, explanation);
if (value != null)
{
if (!listValue.Val.Contains(value))
{
ListValue newListValue = new ListValue(listValue);
int index = newListValue.Val.IndexOf(EfsSystem.Instance.EmptyValue);
if (index >= 0)
{
ExplanationPart.CreateSubExplanation(explanation, "Inserting", value);
newListValue.Val[index] = value;
}
else
{
// List is full, try to remove an element before inserting the new element
if (ReplaceElement != null)
{
IValue removeValue = ReplaceElement.GetExpressionValue(context, explanation);
ExplanationPart.CreateSubExplanation(explanation, "Replaced element", removeValue);
index = newListValue.Val.IndexOf(removeValue);
if (index >= 0)
{
ExplanationPart.CreateSubExplanation(explanation, "Replacing", value);
newListValue.Val[index] = value.RightSide(variable, true, true);
}
else
{
Root.AddError("Cannot remove replacing element " + removeValue.Name);
}
}
else
{
Root.AddError("Cannot add new element in list value : list is full");
}
}
Change change = new Change(variable, variable.Value, newListValue);
changes.Add(change, apply, runner);
ExplanationPart.CreateSubExplanation(explanation, Root, change);
}
else
{
ExplanationPart.CreateSubExplanation(explanation, "NOT added : Already present in collection", value);
}
}
else
{
Root.AddError("Cannot find value for " + Value);
}
}
else
{
Root.AddError("Variable " + ListExpression + " does not contain a list value");
}
}
else
{
Root.AddError("Cannot find variable for " + ListExpression);
}
}
/// <summary>
/// Prepares the iteration on the context provided
/// </summary>
/// <param name="context"></param>
protected override int PrepareIteration(InterpretationContext context)
{
int retVal = base.PrepareIteration(context);
context.LocalScope.setVariable(AccumulatorVariable);
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
public override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = null;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = EFSSystem.BoolType.False;
foreach (IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
ElementFound = true;
IteratorVariable.Value = v;
if (Condition != null)
{
BoolValue b = Condition.GetValue(context, explain) as BoolValue;
if (b != null && b.Val)
{
MatchingElementFound = true;
retVal = EFSSystem.BoolType.True;
break;
}
}
else
{
retVal = EFSSystem.BoolType.True;
break;
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return retVal;
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
IVariable var = VariableIdentification.GetVariable(context);
if (var != null)
{
IValue value = Expression.GetExpressionValue(context, explanation);
if (value != null)
{
value = value.RightSide(var, true, true);
}
Range range = var.Type as Range;
if (range != null && range.convert(value) == null)
{
AddError("Value " + value + " is outside range");
}
else
{
Change change = new Change(var, var.Value, value);
changes.Add(change, apply, runner);
ExplanationPart.CreateSubExplanation(explanation, Root, change);
}
}
else
{
AddError("Cannot find variable " + VariableIdentification);
}
}
/// <summary>
/// Indicates whether the condition is satisfied with the value provided
/// Hyp : the value of the iterator variable has been assigned before
/// </summary>
/// <param name="context"></param>
/// <param name="explain"></param>
/// <returns></returns>
public bool conditionSatisfied(InterpretationContext context, ExplanationPart explain)
{
bool retVal = true;
if (Condition != null)
{
BoolValue b = Condition.GetValue(context, explain) as BoolValue;
if (b == null)
{
retVal = false;
}
else
{
retVal = b.Val;
}
}
return retVal;
}
/// <summary>
/// Applies a rule defined in a procedure
/// </summary>
/// <param name="rule"></param>
/// <param name="changes"></param>
/// <param name="ctxt"></param>
/// <param name="explanation"></param>
/// <param name="runner"></param>
private void ApplyRule(Rule rule, ChangeList changes, InterpretationContext ctxt, ExplanationPart explanation,
Runner runner)
{
foreach (RuleCondition condition in rule.RuleConditions)
{
ExplanationPart conditionExplanation = ExplanationPart.CreateSubExplanation(explanation, condition);
if (condition.EvaluatePreConditions(ctxt, conditionExplanation, runner))
{
ExplanationPart.SetNamable(conditionExplanation, EFSSystem.BoolType.True);
foreach (Action action in condition.Actions)
{
action.GetChanges(ctxt, changes, conditionExplanation, true, runner);
}
foreach (Rule subRule in condition.SubRules)
{
ApplyRule(subRule, changes, ctxt, conditionExplanation, runner);
}
break;
}
else
{
ExplanationPart.SetNamable(conditionExplanation, EFSSystem.BoolType.False);
}
}
}
/// <summary>
/// Provides the changes performed by this statement
/// </summary>
/// <param name="context">The context on which the changes should be computed</param>
/// <param name="changes">The list to fill with the changes</param>
/// <param name="explanation">The explanatino to fill, if any</param>
/// <param name="apply">Indicates that the changes should be applied immediately</param>
/// <param name="runner"></param>
public override void GetChanges(InterpretationContext context, ChangeList changes, ExplanationPart explanation,
bool apply, Runner runner)
{
// Explain what happens in this statement
explanation = ExplanationPart.CreateSubExplanation(explanation, this);
IVariable variable = ListExpression.GetVariable(context);
if (variable != null)
{
// HacK : ensure that the value is a correct rigth side
// and keep the result of the right side operation
ListValue listValue = variable.Value.RightSide(variable, false, false) as ListValue;
variable.Value = listValue;
if (listValue != null)
{
// Provide the state of the list before removing elements from it
ExplanationPart.CreateSubExplanation(explanation, "Input data = ", listValue);
ListValue newListValue = new ListValue(listValue.CollectionType, new List<IValue>());
int token = context.LocalScope.PushContext();
context.LocalScope.SetVariable(IteratorVariable);
int index = 0;
if (Position == PositionEnum.Last)
{
index = listValue.Val.Count - 1;
}
// Remove the element while required to do so
while (index >= 0 && index < listValue.Val.Count)
{
IValue value = listValue.Val[index];
index = NextIndex(index);
IteratorVariable.Value = value;
if (ConditionSatisfied(context, explanation))
{
if (Position != PositionEnum.All)
{
break;
}
}
else
{
InsertInResult(newListValue, value);
}
}
// Complete the list
while (index >= 0 && index < listValue.Val.Count)
{
IValue value = listValue.Val[index];
InsertInResult(newListValue, value);
index = NextIndex(index);
}
Change change = new Change(variable, variable.Value, newListValue);
changes.Add(change, apply, runner);
ExplanationPart.CreateSubExplanation(explanation, Root, change);
context.LocalScope.PopContext(token);
}
}
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.ListValue retVal = null;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = new Values.ListValue((Types.Collection)GetExpressionType(), new List<Values.IValue>());
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
retVal.Val.Add(IteratorExpression.GetValue(context));
}
}
NextIteration();
}
EndIteration(context, token);
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = EfsSystem.Instance.BoolType.False;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
retVal = EfsSystem.Instance.BoolType.False;
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (Condition != null)
{
BoolValue b = Condition.GetValue(context, explain) as BoolValue;
if (b != null && b.Val)
{
MatchingElementFound = true;
retVal = EfsSystem.Instance.BoolType.True;
break;
}
}
else
{
retVal = EfsSystem.Instance.BoolType.True;
break;
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return retVal;
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = EfsSystem.Instance.EmptyValue;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
retVal = v;
break;
}
}
NextIteration();
}
EndIteration(context, explain, token);
}
return retVal;
}
