private bool CheckSimpleStatement()
{
if (this.LookAheadFirst.TokenType != TokenType.OpenBraces)
{
return(false);
}
this.DiscardToken(TokenType.OpenBraces);
bool flag = false;
while (!flag)
{
flag = !this.DoExpressionRules();
}
if (this.IsArithmeticExpression(this.LookAheadFirst.TokenType))
{
TextExpression token = (TextExpression) new SimpleExpression(this.LookAheadFirst);
this.DiscardToken();
this.DiscardToken(TokenType.CloseBraces);
this.PushToken(token);
}
else
{
this.DiscardToken(TokenType.CloseBraces);
}
return(true);
}
private bool CheckFieldStatement()
{
if (this.LookAheadFirst.TokenType != TokenType.FieldStarter)
{
return(false);
}
this.DiscardToken(TokenType.FieldStarter);
bool flag = false;
while (!flag)
{
flag = !this.DoExpressionRules();
}
if (this.LookAheadFirst.TokenType != TokenType.Identifier)
{
return(false);
}
TextExpression lookAheadFirst = this.LookAheadFirst;
this.DiscardToken(TokenType.Identifier);
this.DiscardToken(TokenType.CloseBraces);
TextExpression textExpression = this.GetRootExpressions() ?? (TextExpression) new SimpleToken(TokenType.Text, "");
this.DiscardToken(TokenType.FieldFinalizer);
TextExpression part2 = textExpression;
this.PushToken((TextExpression) new FieldExpression(lookAheadFirst, part2));
return(true);
}
private bool CollapseStatements()
{
if (!this.IsRootExpression(this.LookAheadFirst.TokenType) || this.LookAheadFirst.TokenType == TokenType.MultiStatement)
{
return(false);
}
List <TextExpression> textExpressionList = new List <TextExpression>();
TextExpression lookAheadFirst1 = this.LookAheadFirst;
this.DiscardToken();
textExpressionList.Add(lookAheadFirst1);
bool flag = false;
while (!flag)
{
do
{
;
}while (this.RunRootGrammarRulesExceptCollapse());
if (this.IsRootExpression(this.LookAheadFirst.TokenType))
{
TextExpression lookAheadFirst2 = this.LookAheadFirst;
this.DiscardToken();
textExpressionList.Add(lookAheadFirst2);
}
else
{
flag = true;
}
}
this.PushToken((TextExpression) new MultiStatement((IEnumerable <TextExpression>)textExpressionList));
return(true);
}
public static void CompileExpressions(DynamicActivity dynamicActivity, params Assembly[] references)
{
// See https://docs.microsoft.com/en-us/dotnet/framework/windows-workflow-foundation/csharp-expressions
string activityName = dynamicActivity.Name;
string activityType = activityName.Split('.').Last() + "_CompiledExpressionRoot";
string activityNamespace = string.Join(".", activityName.Split('.').Reverse().Skip(1).Reverse());
TextExpressionCompilerSettings settings = new TextExpressionCompilerSettings
{
Activity = dynamicActivity,
Language = "C#",
ActivityName = activityType,
ActivityNamespace = activityNamespace,
RootNamespace = null,
GenerateAsPartialClass = false,
AlwaysGenerateSource = true,
ForImplementation = true
};
// add assembly references
TextExpression.SetReferencesForImplementation(dynamicActivity, references.Select(a => (AssemblyReference)a).ToList());
// Compile the C# expression.
var results = new TextExpressionCompiler(settings).Compile();
if (results.HasErrors)
{
throw new Exception("Compilation failed.");
}
// attach compilation result to live activity
var compiledExpression = (ICompiledExpressionRoot)Activator.CreateInstance(results.ResultType, new object[] { dynamicActivity });
CompiledExpressionInvoker.SetCompiledExpressionRootForImplementation(dynamicActivity, compiledExpression);
}
private Object evalAssignExpression(Object context, AssignExpression expression)
{
// 取得父对象和键
TextExpression text = expression.Left;
Object parentContext = null;
IdentifierExpression key = null;
if (text is PathExpression path)
{
parentContext = Eval(context, path.SubPath(0, path.Length - 1));
if (path.SubPath(path.Length - 1).Path[0]
is IdentifierExpression identifier)
{
key = identifier;
}
else
{
throw new System.Exception("You can only assign it to a key.");
}
}
else if (text is IdentifierExpression identifier)
{
parentContext = context;
key = identifier;
}
// 取得右值
Object value = Eval(context, expression.Right);
parentContext[key.Literal] = value;
return(value);
}
private void UpdateLookAheads()
{
this._lookaheadFirst = this._symbolSequence.Count != 0 ? this._symbolSequence.Peek() : (TextExpression)SimpleToken.SequenceTerminator;
if (this._symbolSequence.Count < 2)
{
this._lookaheadSecond = (TextExpression)SimpleToken.SequenceTerminator;
}
else
{
TextExpression textExpression = this._symbolSequence.Pop();
this._lookaheadSecond = this._symbolSequence.Peek();
this._symbolSequence.Push(textExpression);
}
if (this._symbolSequence.Count < 3)
{
this._lookaheadThird = (TextExpression)SimpleToken.SequenceTerminator;
}
else
{
TextExpression textExpression1 = this._symbolSequence.Pop();
TextExpression textExpression2 = this._symbolSequence.Pop();
this._lookaheadThird = this._symbolSequence.Peek();
this._symbolSequence.Push(textExpression2);
this._symbolSequence.Push(textExpression1);
}
}
private bool ConsumeComparisonExpression()
{
TokenType tokenType1 = this.LookAheadFirst.TokenType;
TokenType tokenType2 = this.LookAheadSecond.TokenType;
if (!this.IsArithmeticExpression(tokenType1) || !this.IsComparisonOperator(tokenType2))
{
return(false);
}
TextExpression lookAheadFirst1 = this.LookAheadFirst;
this.DiscardToken();
ComparisonOperation comparisonOp = this.GetComparisonOp(tokenType2);
this.DiscardToken();
do
{
;
}while (this.DoExpressionRules());
if (!this.IsArithmeticExpression(this.LookAheadFirst.TokenType))
{
return(false);
}
TextExpression lookAheadFirst2 = this.LookAheadFirst;
this.DiscardToken();
this.PushToken((TextExpression) new ComparisonExpression(comparisonOp, lookAheadFirst1, lookAheadFirst2));
return(true);
}
private bool ConsumeInnerAritmeticExpression()
{
TokenType tokenType1 = this.LookAheadFirst.TokenType;
TokenType tokenType2 = this.LookAheadSecond.TokenType;
int tokenType3 = (int)this.LookAheadThird.TokenType;
if (!this.IsArithmeticExpression(tokenType1) || tokenType2 != TokenType.Multiply && tokenType2 != TokenType.Divide)
{
return(false);
}
TextExpression lookAheadFirst1 = this.LookAheadFirst;
this.DiscardToken();
ArithmeticOperation op = this.ConsumeAritmeticOperation();
if (!this.IsArithmeticExpression(this.LookAheadFirst.TokenType))
{
while (this.DoExpressionRules())
{
;
}
}
TextExpression lookAheadFirst2 = this.LookAheadFirst;
this.DiscardToken();
this.PushToken((TextExpression) new ArithmeticExpression(op, lookAheadFirst1, lookAheadFirst2));
return(true);
}
internal static Text Text(TextExpression expression)
{
return(new Text()
{
QuoteChar = expression.QuoteChar,
SourceText = expression.SourceText,
}.Apply(n => n.TypeHint = expression.TryType().Null(t => TypeRef.Serialize(t))));
}
/// <summary>
/// Parse an TextExpression
/// </summary>
/// <returns>Parsed TextExpression</returns>
public TextExpression ParseTextExpression()
{
TextExpression textExpression = new TextExpression();
CurrentToken = TokenStream.NextToken();
textExpression.SetText(CurrentToken.GetValue().ToString());
return(textExpression);
}
public void ParseTextExpressionTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("text"));
TextExpression expression = expressionParser.ParseTextExpression();
//Test variable identifier
Assert.AreEqual("text", expression.GetText());
}
public void EmptyInput()
{
// Given
var expression = new TextExpression("foo");
// When
var result = expression.Transform("");
// Then
Assert.Null(result);
}
public void PartialMatch()
{
// Given
var expression = new TextExpression("foo");
// When
var result = expression.Transform("foobar");
// Then
Assert.Null(result);
}
public void Match()
{
// Given
var expression = new TextExpression("foo");
// When
var result = expression.Transform("foo");
// Then
Assert.Equal("foo", result);
}
public void SetNamespaces(object target)
{
var dev2ActivitiesAssembly = typeof(WorkflowHelper).Assembly;
var dev2CommonAssembly = typeof(GlobalConstants).Assembly;
var dev2DataAssembly = typeof(Dev2DataListDecisionHandler).Assembly;
var namespaces = new Dictionary <string, Assembly>
{
{ "Dev2.Common", dev2CommonAssembly },
{ "Dev2.Data.Decisions.Operations", dev2DataAssembly },
{ "Dev2.Data.SystemTemplates.Models", dev2DataAssembly },
{ "Dev2.DataList.Contract", dev2DataAssembly },
{ "Dev2.DataList.Contract.Binary_Objects", dev2DataAssembly },
{ "Unlimited.Applications.BusinessDesignStudio.Activities", dev2ActivitiesAssembly }
};
#region Set C# assembly references
// http://stackoverflow.com/questions/16086612/wf-4-5-using-c-sharp-expressions-with-external-class-references
// http://blogs.msdn.com/b/tilovell/archive/2012/05/25/wf4-5-using-csharpvalue-lt-t-gt-and-csharpreference-lt-t-gt-in-net-4-5-compiling-expressions-and-changes-in-visual-studio-generated-xaml.aspx
TextExpression.SetReferencesForImplementation(target, namespaces.Values.Distinct().Select(a => new AssemblyReference {
Assembly = a
}).ToArray());
var impl = new AttachableMemberIdentifier(typeof(TextExpression), "NamespacesForImplementation");
AttachablePropertyServices.SetProperty(target, impl, namespaces.Keys.ToList());
#endregion
#region Set VB assembly references
// var vbSettings = VisualBasic.GetSettings(target) ?? new VisualBasicSettings();
// vbSettings.ImportReferences.Clear();
//
// foreach(var ns in namespaces.Keys)
// {
// try
// {
// vbSettings.ImportReferences.Add(new VisualBasicImportReference { Assembly = namespaces[ns].GetName().Name, Import = ns });
// }
// catch(Exception e)
// {
// Dev2Logger.Error(e.Message,e);
// }
// }
//
// VisualBasic.SetSettings(target, vbSettings);
#endregion
}
internal static void SetTextExpressionNamespaces(object root, IList <string> namespaces, IList <AssemblyReference> references)
{
if (NamespaceHelper.ShouldUsePropertiesForImplementation(root))
{
TextExpression.SetNamespacesForImplementation(root, namespaces);
TextExpression.SetReferencesForImplementation(root, references);
}
else
{
TextExpression.SetNamespaces(root, namespaces);
TextExpression.SetReferences(root, references);
}
}
internal static IList <string> GetTextExpressionNamespaces(object root, out IList <AssemblyReference> references)
{
if (NamespaceHelper.ShouldUsePropertiesForImplementation(root))
{
references = TextExpression.GetReferencesForImplementation(root);
return(TextExpression.GetNamespacesForImplementation(root));
}
else
{
references = TextExpression.GetReferences(root);
return(TextExpression.GetNamespaces(root));
}
}
private static object?Evaluate(Expression expression, IDictionary <string, object> properties)
{
return(expression switch
{
TextExpression text => text.Value,
ConstantExpression constant => constant.Value,
PipeExpression pipe => PipeValue(pipe, properties),
TemplateExpression part => EvaluateTemplate(part, properties),
PropertyExpression property => GetProperty(property, properties),
FunctionCallExpression function => CallFunction(function, properties),
MultiTemplateExpression => throw new NotSupportedException("Multi-template expressions are top-level expressions only."),
_ => throw new NotImplementedException(string.Format(Strings.EvaluationNotImplemented, expression)),
});
private bool ConsumeMarkerOccuranceExpression()
{
if (this.LookAheadFirst.TokenType != TokenType.Identifier || this.LookAheadSecond.TokenType != TokenType.MarkerOccuranceIdentifier)
{
return(false);
}
VariableExpression lookAheadFirst = this.LookAheadFirst as VariableExpression;
TextExpression lookAheadSecond = this.LookAheadSecond;
this.DiscardToken();
this.DiscardToken();
this.PushToken((TextExpression) new MarkerOccuranceTextExpression(lookAheadSecond.RawValue.Substring(2), lookAheadFirst));
return(true);
}
private IExpression ParseInterpolation()
{
var nextToken = PeekToken();
if (nextToken.GetType() != typeof(OpenBraceToken))
{
return(new TextExpression("$"));
}
ConsumeToken();
nextToken = PeekToken();
if (nextToken.GetType() != typeof(TextDataToken))
{
throw new InvalidOperationException("Function ID expected.");
}
var idToken = ConsumeToken();
nextToken = PeekToken();
if (nextToken.GetType() == typeof(CloseBraceToken))
{
ConsumeToken();
return(new InterpolateExpression(idToken.Text));
}
if (nextToken.GetType() != typeof(ColonToken))
{
throw new InvalidOperationException("Function parameter list or closing brace expected.");
}
ConsumeToken();
var expression = new InterpolateExpression(idToken.Text);
while (true)
{
var paramExpression = ParseInside(false, typeof(CloseBraceToken), typeof(CommaToken));
nextToken = PeekToken();
if (paramExpression == null)
{
paramExpression = new TextExpression("");
}
expression.Parameters.Add(paramExpression);
if (nextToken.GetType() == typeof(CloseBraceToken))
{
break;
}
ConsumeToken();
}
ConsumeToken();
return(expression);
}
public void ParseKeyValuePairTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("token1:\"value1\""));
KeyValuePair keyValuePair = expressionParser.ParseKeyValuePair();
//Check key
Assert.AreEqual("token1", keyValuePair.GetKey());
//Check value
Assert.AreEqual(typeof(TextExpression), keyValuePair.GetValue().GetType());
TextExpression textExpression = (TextExpression)keyValuePair.GetValue();
Assert.AreEqual("value1", textExpression.GetText());
}
private bool CheckConditionalStatement()
{
if (this.LookAheadFirst.TokenType != TokenType.ConditionStarter)
{
return(false);
}
bool flag = false;
List <TextExpression> conditionExpressions = new List <TextExpression>();
List <TextExpression> resultExpressions2 = new List <TextExpression>();
while (!flag)
{
TokenType tokenType = this.LookAheadFirst.TokenType;
if (this.LookAheadFirst.TokenType == TokenType.ConditionStarter || this.LookAheadFirst.TokenType == TokenType.ConditionFollowUp)
{
this.DiscardToken();
do
{
;
}while (this.DoExpressionRules());
if (!this.IsArithmeticExpression(this.LookAheadFirst.TokenType))
{
return(false);
}
conditionExpressions.Add(this.LookAheadFirst);
this.DiscardToken();
this.DiscardToken(TokenType.CloseBraces);
}
else
{
if (tokenType != TokenType.ConditionSeperator && tokenType != TokenType.Seperator)
{
return(false);
}
this.DiscardToken();
flag = true;
}
TextExpression textExpression = this.GetRootExpressions() ?? (TextExpression) new SimpleToken(TokenType.Text, "");
resultExpressions2.Add(textExpression);
}
do
{
;
}while (!flag);
this.DiscardToken(TokenType.ConditionFinalizer);
this.PushToken((TextExpression) new ConditionExpression(conditionExpressions, resultExpressions2));
return(true);
}
private static DynamicActivity GetDynamicActivity(ActivityBuilder activityDefinition)
{
var result = new DynamicActivity
{
Name = activityDefinition.Name
};
foreach (var property in activityDefinition.Properties)
{
result.Properties.Add(property);
}
foreach (var attrib in activityDefinition.Attributes)
{
result.Attributes.Add(attrib);
}
foreach (var constraint in activityDefinition.Constraints)
{
result.Constraints.Add(constraint);
}
result.Implementation = () => activityDefinition.Implementation;
var vbsettings = VisualBasic.GetSettings(activityDefinition);
if (vbsettings != null)
{
VisualBasic.SetSettings(result, vbsettings);
}
var namespacesForImplementation = TextExpression.GetNamespacesForImplementation(activityDefinition);
if (namespacesForImplementation.Count > 0)
{
TextExpression.SetNamespacesForImplementation(result, namespacesForImplementation);
}
var referencesForImplementation = TextExpression.GetReferencesForImplementation(activityDefinition);
if (referencesForImplementation.Count > 0)
{
TextExpression.SetReferencesForImplementation(result, referencesForImplementation);
}
return(result);
}
static DynamicActivity GetDynamicActivity(ActivityBuilder activityDefinition)
{
DynamicActivity result = new DynamicActivity
{
Name = activityDefinition.Name
};
foreach (DynamicActivityProperty property in activityDefinition.Properties)
{
result.Properties.Add(property);
}
foreach (Attribute attrib in activityDefinition.Attributes)
{
result.Attributes.Add(attrib);
}
foreach (Constraint constraint in activityDefinition.Constraints)
{
result.Constraints.Add(constraint);
}
result.Implementation = () => activityDefinition.Implementation;
VisualBasicSettings vbsettings = VisualBasic.GetSettings(activityDefinition);
if (vbsettings != null)
{
VisualBasic.SetSettings(result, vbsettings);
}
IList <string> namespacesForImplementation = TextExpression.GetNamespacesForImplementation(activityDefinition);
if (namespacesForImplementation.Count > 0)
{
TextExpression.SetNamespacesForImplementation(result, namespacesForImplementation);
}
IList <AssemblyReference> referencesForImplementation = TextExpression.GetReferencesForImplementation(activityDefinition);
if (referencesForImplementation.Count > 0)
{
TextExpression.SetReferencesForImplementation(result, referencesForImplementation);
}
return(result);
}
private bool CheckSelectionStatement()
{
if (this.LookAheadFirst.TokenType != TokenType.SelectionStarter)
{
return(false);
}
this.DiscardToken(TokenType.SelectionStarter);
do
{
;
}while (this.DoExpressionRules());
if (!this.IsArithmeticExpression(this.LookAheadFirst.TokenType))
{
return(false);
}
TextExpression lookAheadFirst = this.LookAheadFirst;
this.DiscardToken();
this.DiscardToken(TokenType.CloseBraces);
bool flag = false;
List <TextExpression> selectionExpressions = new List <TextExpression>();
do
{
TextExpression textExpression = this.GetRootExpressions() ?? (TextExpression) new SimpleToken(TokenType.Text, "");
selectionExpressions.Add(textExpression);
switch (this.LookAheadFirst.TokenType)
{
case TokenType.SelectionSeperator:
this.DiscardToken();
break;
case TokenType.SelectionFinalizer:
flag = true;
this.DiscardToken();
break;
default:
return(false);
}
}while (!flag);
this.PushToken((TextExpression) new SelectionExpression(lookAheadFirst, selectionExpressions));
return(true);
}
public static TextExpression Create(
AphidExpressionContext context_aphidExpressionContext,
string text_s,
int value_i,
int value_i1
)
{
TextExpression textExpression
= new TextExpression(context_aphidExpressionContext, text_s);
((AphidExpression)textExpression).Index = value_i;
((AphidExpression)textExpression).Length = value_i1;
return(textExpression);
// TODO: Edit factory method of TextExpression
// This method should be able to configure the object in all possible ways.
// Add as many parameters as needed,
// and assign their values to each field by using the API.
}
private void GetRootExpressionsImp(List <TextExpression> expList)
{
while (true)
{
do
{
;
}while (this.RunRootGrammarRulesExceptCollapse());
if (this.IsRootExpression(this.LookAheadFirst.TokenType))
{
TextExpression lookAheadFirst = this.LookAheadFirst;
this.DiscardToken();
expList.Add(lookAheadFirst);
}
else
{
break;
}
}
}
public static IEnumerable <string> EnumerateImports(EditingContext context, ModelItem modelItem)
{
IEnumerable <string> enumerable = context?.Services.GetService(typeof(HashSet <string>)) as HashSet <string>;
IEnumerable <string> first = enumerable ?? Enumerable.Empty <string>();
object obj = modelItem?.Root?.GetCurrentValue();
object enumerable2;
if (obj == null)
{
enumerable2 = Enumerable.Empty <string>();
}
else
{
enumerable = TextExpression.GetNamespacesForImplementation(obj);
enumerable2 = enumerable;
}
IEnumerable <string> second = (IEnumerable <string>)enumerable2;
return(first.Union(second).Distinct());
}
/// <summary>
/// Visit FunctionDefinition to check declarations
/// </summary>
/// <param name="functionDefinition">FunctionDefinition to check</param>
public override void Visit(FunctionDefinition functionDefinition)
{
CreateChildSymbolTable();
//Check Formals
foreach (Formal formal in functionDefinition.GetFormals())
{
//Add variable, but with nullvalue, because value is undefined in definition
TextExpression textExpression = new TextExpression();
SymbolTable.AddVariableDefinition(formal.GetIdentifier(), textExpression);
}
//Check Statements of function
foreach (Statement statement in functionDefinition.GetStatements())
{
statement.AcceptVisitor(this);
}
MoveToParentSymbolTable();
}
static void Main()
{
var errorCodeWorkflow = new DynamicActivity
{
Name = "MyScenario.MyDynamicActivity3",
Properties =
{
new DynamicActivityProperty
{
Name = "Address",
Type = typeof(InArgument <MailAddress>),
},
},
Implementation = () => new WriteLine
{
Text = new CSharpValue <String>
{
ExpressionText = "\"MyDynamicActivity \" + Address.DisplayName"
}
}
};
var impl = new AttachableMemberIdentifier(typeof(TextExpression), "NamespacesForImplementation");
var namespaces = new List <string> {
typeof(MailAddress).Namespace
};
TextExpression.SetReferencesForImplementation(errorCodeWorkflow, new AssemblyReference {
Assembly = typeof(MailAddress).Assembly
});
AttachablePropertyServices.SetProperty(errorCodeWorkflow, impl, namespaces);
CompileExpressions(errorCodeWorkflow);
WorkflowInvoker.Invoke(errorCodeWorkflow, new Dictionary <String, Object> {
{ "Address", new MailAddress {
DisplayName = "TestDisplayName"
} }
});
}
