/// <summary>
        ///     Adds a reference which satisfies the provided expectation in the result set
        /// </summary>
        /// <param name="namable"></param>
        /// <param name="expectation"></param>
        /// <param name="asType">Indicates that we had to move from instance to type to perform the deferencing</param>
        /// <param name="resultSet"></param>
        private int addReference(INamable namable, BaseFilter expectation, bool asType, ReturnValue resultSet)
        {
            int retVal = 0;

            if (namable != null)
            {
                if (expectation.AcceptableChoice(namable))
                {
                    if (asType)
                    {
                        if (!(namable is IValue) && !(namable is Type))
                        {
                            resultSet.Add(namable);
                            retVal += 1;
                        }
                        else if (namable is State)
                        {
                            // TODO : Refactor model to avoid this
                            resultSet.Add(namable);
                            retVal += 1;
                        }
                    }
                    else
                    {
                        resultSet.Add(namable);
                        retVal += 1;
                    }
                }
            }

            return retVal;
        }
        /// <summary>
        ///     Fills the retVal result set according to the subDeclarator class provided as parameter
        /// </summary>
        /// <param name="subDeclarator">The subdeclarator used to get the image</param>
        /// <param name="expectation">The expectatino of the desired element</param>
        /// <param name="asType">Indicates that we had to go from the values to the types to perform dereferencing</param>
        /// <param name="values">The return value to update</param>
        /// <return>the number of elements added</return>
        private int FillBySubdeclarator(ISubDeclarator subDeclarator, BaseFilter expectation, bool asType,
            ReturnValue values)
        {
            int retVal = 0;

            if (subDeclarator != null)
            {
                // Go to the beginning of the update chain
                ISubDeclarator currentDeclarator = subDeclarator;
                ModelElement modelElement = subDeclarator as ModelElement;
                while (modelElement != null)
                {
                    if (modelElement.Updates != null)
                    {
                        currentDeclarator = modelElement.Updates as ISubDeclarator;
                    }
                    modelElement = modelElement.Updates;
                }

                while (currentDeclarator != null)
                {
                    // Adds the elements of the current declarator
                    List<INamable> tmp = new List<INamable>();
                    currentDeclarator.Find(Image, tmp);
                    foreach (INamable namable in tmp)
                    {
                        retVal += addReference(namable, expectation, asType, values);
                    }

                    // Follow the update chain
                    modelElement = currentDeclarator as ModelElement;
                    if (modelElement != null && modelElement.UpdatedBy.Count == 1)
                    {
                        currentDeclarator = modelElement.UpdatedBy[0] as ISubDeclarator;
                    }
                    else
                    {
                        currentDeclarator = null;
                    }
                }
            }

            values.ApplyUpdates();

            return retVal;
        }
        /// <summary>
        ///     Provides the possible references for this expression (only available during semantic analysis)
        /// </summary>
        /// <param name="instance">the instance on which this element should be found.</param>
        /// <param name="expectation">the expectation on the element found</param>
        /// <param name="last">indicates that this is the last element in a dereference chain</param>
        /// <returns></returns>
        public override ReturnValue getReferences(INamable instance, BaseFilter expectation, bool last)
        {
            ReturnValue retVal = Arguments[0].getReferences(instance, AllMatches.INSTANCE, false);

            if (retVal.IsEmpty)
            {
                retVal = Arguments[0].getReferenceTypes(instance, AllMatches.INSTANCE, false);
            }

            // When variables & parameters are found, only consider the first one
            // which is the one that is closer in the tree
            {
                ReturnValue tmp2 = retVal;
                retVal = new ReturnValue();

                ReturnValueElement variable = null;
                foreach (ReturnValueElement elem in tmp2.Values)
                {
                    if (elem.Value is Parameter || elem.Value is IVariable)
                    {
                        if (variable == null)
                        {
                            variable = elem;
                            retVal.Values.Add(elem);
                        }
                    }
                    else
                    {
                        retVal.Values.Add(elem);
                    }
                }
            }

            if (!retVal.IsEmpty)
            {
                for (int i = 1; i < Arguments.Count; i++)
                {
                    ReturnValue tmp2 = retVal;
                    retVal = new ReturnValue(Arguments[i]);

                    foreach (ReturnValueElement elem in tmp2.Values)
                    {
                        bool removed = false;
                        ModelElement model = elem.Value as ModelElement;
                        if (model != null)
                        {
                            removed = model.IsRemoved;
                        }

                        if (!removed)
                        {
                            retVal.Merge(elem,
                                Arguments[i].getReferences(elem.Value, AllMatches.INSTANCE, i == (Arguments.Count - 1)));
                        }
                    }

                    if (retVal.IsEmpty)
                    {
                        AddError("Cannot find " + Arguments[i].ToString() + " in " + Arguments[i - 1].ToString());
                    }
                }
            }
            else
            {
                AddError("Cannot evaluate " + Arguments[0].ToString());
            }

            retVal.filter(expectation);

            return retVal;
        }
        /// <summary>
        ///     Provides the possible references for this designator (only available during semantic analysis)
        /// </summary>
        /// <param name="instance">the instance on which this element should be found.</param>
        /// <param name="expectation">the expectation on the element found</param>
        /// <param name="lastElement">Indicates that this element is the last one in a dereference chain</param>
        /// <returns></returns>
        public ReturnValue GetReferences(INamable instance, BaseFilter expectation, bool lastElement)
        {
            ReturnValue retVal = new ReturnValue(this);

            if (instance == null)
            {
                // Special handling for THIS or ENCLOSING
                if (Image == ThisKeyword || Image == EnclosingKeyword)
                {
                    INamable currentElem = Root;
                    while (currentElem != null)
                    {
                        Type type = currentElem as Type;
                        if (type != null)
                        {
                            StateMachine stateMachine = type as StateMachine;
                            while (stateMachine != null)
                            {
                                type = stateMachine;
                                stateMachine = stateMachine.EnclosingStateMachine;
                            }

                            // Enclosing does not references state machines.
                            if (!(Image == EnclosingKeyword && type is StateMachine))
                            {
                                retVal.Add(type);
                                return retVal;
                            }
                        }
                        currentElem = enclosing(currentElem);
                    }

                    return retVal;
                }

                // No enclosing instance. Try to first name of a . separated list of names
                //  . First in the enclosing expression
                InterpreterTreeNode current = this;
                while (current != null)
                {
                    ISubDeclarator subDeclarator = current as ISubDeclarator;
                    if (FillBySubdeclarator(subDeclarator, expectation, false, retVal) > 0)
                    {
                        // If this is the last element in the dereference chain, stop at first match
                        if (lastElement)
                        {
                            return retVal;
                        }
                        current = null;
                    }
                    else
                    {
                        current = current.Enclosing;
                    }
                }

                // . In the predefined elements
                addReference(EfsSystem.Instance.GetPredefinedItem(Image), expectation, false, retVal);
                if (lastElement && !retVal.IsEmpty)
                {
                    return retVal;
                }

                // . In the enclosing items, except the enclosing dictionary since dictionaries are handled in a later step
                INamable currentNamable = Root;
                while (currentNamable != null)
                {
                    ISubDeclarator subDeclarator = currentNamable as ISubDeclarator;
                    if (subDeclarator != null && !(subDeclarator is Dictionary))
                    {
                        if (FillBySubdeclarator(subDeclarator, expectation, false, retVal) > 0 && lastElement)
                        {
                            return retVal;
                        }
                    }

                    currentNamable = EnclosingSubDeclarator(currentNamable);
                }

                // . In the dictionaries declared in the system
                foreach (Dictionary dictionary in EfsSystem.Instance.Dictionaries)
                {
                    if (FillBySubdeclarator(dictionary, expectation, false, retVal) > 0 && lastElement)
                    {
                        return retVal;
                    }

                    NameSpace defaultNameSpace = dictionary.FindNameSpace("Default");
                    if (defaultNameSpace != null)
                    {
                        if (FillBySubdeclarator(defaultNameSpace, expectation, false, retVal) > 0 && lastElement)
                        {
                            return retVal;
                        }
                    }
                }
            }
            else
            {
                // The instance is provided, hence, this is not the first designator in the . separated list of designators
                bool asType = false;
                if (instance is ITypedElement && !(instance is State))
                {
                    // If the instance is a typed element, dereference it to its corresponding type
                    ITypedElement element = instance as ITypedElement;
                    if (element.Type != EfsSystem.Instance.NoType)
                    {
                        instance = element.Type;
                        asType = true;
                    }
                }

                // Find the element in all enclosing sub declarators of the instance
                while (instance != null)
                {
                    ISubDeclarator subDeclarator = instance as ISubDeclarator;
                    if (FillBySubdeclarator(subDeclarator, expectation, asType, retVal) > 0)
                    {
                        instance = null;
                    }
                    else
                    {
                        if (instance is Dictionary)
                        {
                            instance = EnclosingSubDeclarator(instance);
                        }
                        else
                        {
                            instance = null;
                        }
                    }
                }
            }

            return retVal;
        }
        /// <summary>
        ///     Provides the possible references types for this expression (used in semantic analysis)
        /// </summary>
        /// <param name="instance">the reference instance on which this element should analysed</param>
        /// <param name="expectation">Indicates the kind of element we are looking for</param>
        /// <param name="last">indicates that this is the last element in a dereference chain</param>
        /// <returns></returns>
        public virtual ReturnValue GetReferenceTypes(INamable instance, BaseFilter expectation, bool last)
        {
            ReturnValue retVal = new ReturnValue(this);

            SemanticAnalysis(instance, AllMatches.INSTANCE);
            const bool asType = true;
            retVal.Add(GetExpressionType(), null, asType);

            return retVal;
        }
Esempio n. 6
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        /// <summary>
        ///     Provides the possible references types for this expression (used in semantic analysis)
        /// </summary>
        /// <param name="instance">the reference instance on which this element should analysed</param>
        /// <param name="expectation">Indicates the kind of element we are looking for</param>
        /// <param name="last">indicates that this is the last element in a dereference chain</param>
        /// <returns></returns>
        public ReturnValue GetReferenceTypes(INamable instance, BaseFilter expectation, bool last)
        {
            ReturnValue retVal = null;

            if (Designator != null)
            {
                retVal = new ReturnValue();

                foreach (ReturnValueElement element in Designator.GetReferences(instance, expectation, last).Values)
                {
                    if (element.Value is Type)
                    {
                        const bool asType = true;
                        retVal.Add(element.Value, null, asType);
                    }
                }
            }
            else if (LiteralValue != null)
            {
                retVal = LiteralValue.GetReferenceTypes(instance, expectation, true);
            }

            return retVal;
        }
 /// <summary>
 /// Merges the other return value with this one
 /// </summary>
 /// <param name="previous">The previous ReturnValueElement which lead to this ReturnValueElement</param>
 /// <param name="other">The other return value to merge with</param>
 public void Merge(ReturnValueElement previous, ReturnValue other)
 {
     foreach (ReturnValueElement elem in other.Values)
     {
         Add(elem.Value, previous);
     }
 }
        /// <summary>
        /// Performs the semantic analysis of the expression
        /// </summary>
        /// <param name="instance">the reference instance on which this element should analysed</param>
        /// <paraparam name="expectation">Indicates the kind of element we are looking for</paraparam>
        /// <returns>True if semantic analysis should be continued</returns>
        public override bool SemanticAnalysis(Utils.INamable instance, Filter.AcceptableChoice expectation)
        {
            bool retVal = base.SemanticAnalysis(instance, expectation);

            if (retVal)
            {
                Ref = null;

                ReturnValue tmp = Arguments[0].getReferences(instance, Filter.AllMatches, false);
                if (tmp.IsEmpty)
                {
                    tmp = Arguments[0].getReferenceTypes(instance, Filter.AllMatches, false);
                }

                if (!tmp.IsEmpty)
                {
                    for (int i = 1; i < Arguments.Count; i++)
                    {
                        ReturnValue tmp2 = tmp;
                        tmp = new ReturnValue(Arguments[i]);

                        foreach (ReturnValueElement elem in tmp2.Values)
                        {
                            tmp.Merge(elem, Arguments[i].getReferences(elem.Value, Filter.AllMatches, i == (Arguments.Count - 1)));
                        }

                        if (tmp.IsEmpty)
                        {
                            AddError("Cannot find " + Arguments[i].ToString() + " in " + Arguments[i - 1].ToString());
                        }
                    }
                }
                else
                {
                    AddError("Cannot evaluate " + Arguments[0].ToString());
                }

                tmp.filter(expectation);
                if (tmp.IsUnique)
                {
                    // Unique element has been found. Reference it and perform the semantic analysis
                    // on all dereferenced expression, now that the context is known for each expression
                    Ref = tmp.Values[0].Value;

                    ReturnValueElement current = tmp.Values[0];
                    for (int i = Arguments.Count - 1; i > 0; i--)
                    {
                        current = current.PreviousElement;
                        Arguments[i].SemanticAnalysis(current.Value);
                    }
                    Arguments[0].SemanticAnalysis();
                }
                else if (tmp.IsAmbiguous)
                {
                    // Several possible interpretations for this deref expression, not allowed
                    AddError("Expression " + ToString() + " may have several interpretations " + tmp.ToString() + ", please disambiguate");
                }
                else
                {
                    // No possible interpretation for this deref expression, not allowed
                    AddError("Expression " + ToString() + " has no interpretation");

                }
            }

            return retVal;
        }
        /// <summary>
        /// Provides the possible references types for this expression (used in semantic analysis)
        /// </summary>
        /// <param name="instance">the reference instance on which this element should analysed</param>
        /// <paraparam name="expectation">Indicates the kind of element we are looking for</paraparam>
        /// <param name="last">indicates that this is the last element in a dereference chain</param>
        /// <returns></returns>
        public virtual ReturnValue getReferenceTypes(Utils.INamable instance, Filter.AcceptableChoice expectation, bool last)
        {
            ReturnValue retVal = new ReturnValue(this);

            SemanticAnalysis(instance, Filter.AllMatches);
            retVal.Add(GetExpressionType());

            return retVal;
        }
Esempio n. 10
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        /// <summary>
        /// Provides the possible references types for this expression (used in semantic analysis)
        /// </summary>
        /// <param name="instance">the reference instance on which this element should analysed</param>
        /// <paraparam name="expectation">Indicates the kind of element we are looking for</paraparam>
        /// <param name="last">indicates that this is the last element in a dereference chain</param>
        /// <returns></returns>
        public ReturnValue getReferenceTypes(Utils.INamable instance, Filter.AcceptableChoice expectation, bool last)
        {
            ReturnValue retVal = null;

            if (Designator != null)
            {
                retVal = new ReturnValue();

                foreach (ReturnValueElement element in Designator.getReferences(instance, expectation, last).Values)
                {
                    if (element.Value is Types.Type)
                    {
                        retVal.Add(element.Value);
                    }
                }
            }
            else if (LiteralValue != null)
            {
                retVal = LiteralValue.getReferenceTypes(instance, expectation, true);
            }

            return retVal;
        }
        /// <summary>
        /// Fills the retVal result set according to the subDeclarator class provided as parameter
        /// </summary>
        /// <param name="subDeclarator">The subdeclarator used to get the image</param>
        /// <param name="expectation">The expectatino of the desired element</param>
        /// <param name="location">The location of the element found</param>
        /// <param name="values">The return value to update</param>
        /// <return>the number of elements added</return>
        private int FillBySubdeclarator(Utils.ISubDeclarator subDeclarator, Filter.AcceptableChoice expectation, ReturnValue values)
        {
            int retVal = 0;

            if (subDeclarator != null)
            {
                List<Utils.INamable> tmp = new List<Utils.INamable>();
                subDeclarator.Find(Image, tmp);
                foreach (Utils.INamable namable in tmp)
                {
                    addReference(namable, expectation, values);
                    retVal += 1;
                }
            }

            return retVal;
        }
 /// <summary>
 /// Adds a reference which satisfies the provided expectation in the result set
 /// </summary>
 /// <param name="namable"></param>
 /// <param name="expectation"></param>
 /// <param name="resultSet"></param>
 private void addReference(INamable namable, Filter.AcceptableChoice expectation, ReturnValue resultSet)
 {
     if (namable != null)
     {
         if (expectation(namable))
         {
             resultSet.Add(namable);
         }
     }
 }
        /// <summary>
        /// Provides the possible references for this designator (only available during semantic analysis)
        /// </summary>
        /// <param name="instance">the instance on which this element should be found.</param>
        /// <param name="expectation">the expectation on the element found</param>
        /// <param name="lastElement">Indicates that this element is the last one in a dereference chain</param>
        /// <returns></returns>
        public ReturnValue getReferences(INamable instance, Filter.AcceptableChoice expectation, bool lastElement)
        {
            ReturnValue retVal = new ReturnValue(this);

            if (instance == null)
            {
                // Special handling for THIS
                if (Image.CompareTo("THIS") == 0)
                {
                    INamable currentElem = Root;
                    while (currentElem != null)
                    {
                        Types.Type type = currentElem as Types.Type;
                        if (type != null)
                        {
                            Types.StateMachine stateMachine = type as Types.StateMachine;
                            while (stateMachine != null)
                            {
                                type = stateMachine;
                                stateMachine = stateMachine.EnclosingStateMachine;
                            }
                            retVal.Add(type);
                            return retVal;
                        }
                        currentElem = enclosing(currentElem);
                    }

                    return retVal;
                }

                // No enclosing instance. Try to first name of a . separated list of names
                //  . First in the enclosing expression
                InterpreterTreeNode current = this;
                while (current != null)
                {
                    ISubDeclarator subDeclarator = current as ISubDeclarator;
                    if (FillBySubdeclarator(subDeclarator, expectation, retVal) > 0)
                    {
                        // If this is the last element in the dereference chain, stop at first match
                        if (lastElement)
                        {
                            return retVal;
                        }
                        current = null;
                    }
                    else
                    {
                        current = current.Enclosing;
                    }
                }

                // . In the predefined elements
                addReference(EFSSystem.getPredefinedItem(Image), expectation, retVal);
                if (lastElement && !retVal.IsEmpty)
                {
                    return retVal;
                }

                // . In the enclosing items, except the enclosing dictionary since dictionaries are handled in a later step
                INamable currentNamable = Root;
                while (currentNamable != null)
                {
                    Utils.ISubDeclarator subDeclarator = currentNamable as Utils.ISubDeclarator;
                    if (subDeclarator != null && !(subDeclarator is Dictionary))
                    {
                        if (FillBySubdeclarator(subDeclarator, expectation, retVal) > 0 && lastElement)
                        {
                            return retVal;
                        }
                    }

                    currentNamable = enclosingSubDeclarator(currentNamable);
                }

                // . In the dictionaries declared in the system
                foreach (Dictionary dictionary in EFSSystem.Dictionaries)
                {
                    if (FillBySubdeclarator(dictionary, expectation, retVal) > 0 && lastElement)
                    {
                        return retVal;
                    }

                    Types.NameSpace defaultNameSpace = dictionary.findNameSpace("Default");
                    if (defaultNameSpace != null)
                    {
                        if (FillBySubdeclarator(defaultNameSpace, expectation, retVal) > 0 && lastElement)
                        {
                            return retVal;
                        }
                    }
                }
            }
            else
            {
                // The instance is provided, hence, this is not the first designator in the . separated list of designators
                if (instance is Types.ITypedElement && !(instance is Constants.State))
                {
                    // If the instance is a typed element, dereference it to its corresponding type
                    Types.ITypedElement element = instance as Types.ITypedElement;
                    if (element.Type != EFSSystem.NoType)
                    {
                        instance = element.Type;
                    }
                }

                // Find the element in all enclosing sub declarators of the instance
                while (instance != null)
                {
                    Utils.ISubDeclarator subDeclarator = instance as Utils.ISubDeclarator;
                    if (FillBySubdeclarator(subDeclarator, expectation, retVal) > 0)
                    {
                        instance = null;
                    }
                    else
                    {
                        if (instance is Dictionary)
                        {
                            instance = enclosingSubDeclarator(instance);
                        }
                        else
                        {
                            instance = null;
                        }
                    }
                }
            }

            return retVal;
        }