void AddPropertyForDuplicates(string name, CompiledDataContextDescriptor contextDescriptor)
{
CodeMemberProperty accessorProperty = new CodeMemberProperty();
accessorProperty.Attributes = MemberAttributes.Family | MemberAttributes.Final;
accessorProperty.Name = name;
accessorProperty.Type = new CodeTypeReference(typeof(object));
CodeThrowExceptionStatement exception = new CodeThrowExceptionStatement(
new CodeObjectCreateExpression(typeof(InvalidOperationException), new CodePrimitiveExpression(SR.CompiledExpressionsDuplicateName(name))));
accessorProperty.GetStatements.Add(exception);
accessorProperty.SetStatements.Add(exception);
contextDescriptor.CodeTypeDeclaration.Members.Add(accessorProperty);
//
// Create another property for the read only class.
// This will only have a getter so we can't just re-use the property from above
CodeMemberProperty accessorPropertyForReadOnly = new CodeMemberProperty();
accessorPropertyForReadOnly.Attributes = MemberAttributes.Family | MemberAttributes.Final;
accessorPropertyForReadOnly.Name = name;
accessorPropertyForReadOnly.Type = new CodeTypeReference(typeof(object));
//
// OK to share the exception from above
accessorPropertyForReadOnly.GetStatements.Add(exception);
contextDescriptor.CodeTypeDeclarationForReadOnly.Members.Add(accessorPropertyForReadOnly);
}
void GenerateField(MemberData memberData, CompiledDataContextDescriptor contextDescriptor)
{
if (contextDescriptor.Duplicates.Contains(memberData.Name))
{
return;
}
CodeMemberField accessorField = new CodeMemberField();
accessorField.Attributes = MemberAttributes.Family | MemberAttributes.Final;
accessorField.Name = memberData.Name;
accessorField.Type = new CodeTypeReference(memberData.Type);
if (IsRedefinition(memberData.Name))
{
accessorField.Attributes |= MemberAttributes.New;
}
contextDescriptor.CodeTypeDeclaration.Members.Add(accessorField);
contextDescriptor.CodeTypeDeclarationForReadOnly.Members.Add(accessorField);
}
void GenerateProperty(MemberData memberData, CompiledDataContextDescriptor contextDescriptor)
{
if (contextDescriptor.Duplicates.Contains(memberData.Name))
{
return;
}
bool isRedefinition = IsRedefinition(memberData.Name);
CodeMemberProperty accessorProperty = GenerateCodeMemberProperty(memberData, isRedefinition);
//
// Generate a get accessor that looks like this:
// return (Foo) this.GetVariableValue(contextId, locationIndexId)
CodeMethodReturnStatement getterStatement = new CodeMethodReturnStatement(
new CodeCastExpression(memberData.Type, new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(
new CodeThisReferenceExpression(),
"GetVariableValue"),
new CodeBinaryOperatorExpression(
new CodePrimitiveExpression(memberData.Index),
CodeBinaryOperatorType.Add,
new CodeVariableReferenceExpression("locationsOffset")))));
accessorProperty.GetStatements.Add(getterStatement);
// Generate a set accessor that looks something like this:
// this.SetVariableValue(contextId, locationIndexId, value)
accessorProperty.SetStatements.Add(new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(
new CodeThisReferenceExpression(),
"SetVariableValue"),
new CodeBinaryOperatorExpression(
new CodePrimitiveExpression(memberData.Index),
CodeBinaryOperatorType.Add,
new CodeVariableReferenceExpression("locationsOffset")),
new CodePropertySetValueReferenceExpression()));
contextDescriptor.CodeTypeDeclaration.Members.Add(accessorProperty);
//
// Create another property for the read only class.
// This will only have a getter so we can't just re-use the property from above
CodeMemberProperty accessorPropertyForReadOnly = GenerateCodeMemberProperty(memberData, isRedefinition);
//
// OK to share the getter statement from above
accessorPropertyForReadOnly.GetStatements.Add(getterStatement);
contextDescriptor.CodeTypeDeclarationForReadOnly.Members.Add(accessorPropertyForReadOnly);
}
void AddMember(string name, Type type, CompiledDataContextDescriptor contextDescriptor)
{
if (IsValidTextIdentifierName(name))
{
//
// These checks will be invariantlowercase if the language is VB
if (contextDescriptor.Fields.ContainsKey(name) || contextDescriptor.Properties.ContainsKey(name))
{
if (!contextDescriptor.Duplicates.Contains(name))
{
contextDescriptor.Duplicates.Add(name.ToUpperInvariant());
}
}
else
{
MemberData memberData = new MemberData();
memberData.Type = type;
memberData.Name = name;
memberData.Index = contextDescriptor.NextMemberIndex;
if (type.IsValueType)
{
contextDescriptor.Fields.Add(name, memberData);
}
else
{
contextDescriptor.Properties.Add(name, memberData);
}
}
}
//
// Regardless of whether or not this member name is an invalid, duplicate, or valid identifier
// always increment the member count so that the indexes we generate always match
// the list that the runtime gives to the ITextExpression
// The exception here is if the name is null
if (name != null)
{
contextDescriptor.NextMemberIndex++;
}
}
void GenerateMembers(CompiledDataContextDescriptor descriptor)
{
foreach (KeyValuePair<string, MemberData> property in descriptor.Properties)
{
GenerateProperty(property.Value, descriptor);
}
if (descriptor.Fields.Count > 0)
{
foreach (KeyValuePair<string, MemberData> field in descriptor.Fields)
{
GenerateField(field.Value, descriptor);
}
CodeMemberMethod getValueTypeValuesMethod = GenerateGetValueTypeValues(descriptor);
descriptor.CodeTypeDeclaration.Members.Add(getValueTypeValuesMethod);
descriptor.CodeTypeDeclaration.Members.Add(GenerateSetValueTypeValues(descriptor));
descriptor.CodeTypeDeclarationForReadOnly.Members.Add(getValueTypeValuesMethod);
}
if (descriptor.Duplicates.Count > 0 && this.IsVB)
{
foreach (string duplicate in descriptor.Duplicates)
{
AddPropertyForDuplicates(duplicate, descriptor);
}
}
}
void OnRootImplementationScope(Activity activity, out CompiledDataContextDescriptor rootArgumentAccessorContext)
{
Fx.Assert(this.compiledDataContexts.Count == 2, "The stack of data contexts should contain the root argument default expression and accessor contexts");
rootArgumentAccessorContext = this.compiledDataContexts.Pop();
if (activity.RuntimeVariables != null && activity.RuntimeVariables.Count > 0)
{
this.OnVariableScope(activity);
}
}
void OnAfterRootImplementationScope(Activity activity, CompiledDataContextDescriptor rootArgumentAccessorContext)
{
if (activity.RuntimeVariables != null && activity.RuntimeVariables.Count > 0)
{
OnAfterVariableScope();
}
this.compiledDataContexts.Push(rootArgumentAccessorContext);
}
void GenerateValidate(CompiledDataContextDescriptor descriptor, bool forReadOnly)
{
//
//
// Validate the locations at runtime match the set at compile time
//
// protected override bool Validate(IList<LocationReference> locationReferences)
// {
// if (validateLocationCount && locationReferences.Count != [generated count of location references])
// {
// return false;
// }
// if (locationReferences[0].Name != [generated name for index] ||
// locationReferences[0].Type != typeof([generated type for index]))
// {
// return false;
// }
//
// ...
//
// }
CodeMemberMethod validateMethod = new CodeMemberMethod();
validateMethod.Name = "Validate";
validateMethod.Attributes = MemberAttributes.Public | MemberAttributes.Static;
if (this.compiledDataContexts.Count > 0)
{
validateMethod.Attributes |= MemberAttributes.New;
}
validateMethod.ReturnType = new CodeTypeReference(typeof(bool));
validateMethod.Parameters.Add(
new CodeParameterDeclarationExpression(
new CodeTypeReference(typeof(IList<LocationReference>)),
"locationReferences"));
validateMethod.Parameters.Add(
new CodeParameterDeclarationExpression(
new CodeTypeReference(typeof(bool)),
"validateLocationCount"));
validateMethod.Parameters.Add(
new CodeParameterDeclarationExpression(
new CodeTypeReference(typeof(int)),
"offset") );
CodeBinaryOperatorExpression shouldCheckLocationCountExpression = new CodeBinaryOperatorExpression(
new CodeVariableReferenceExpression("validateLocationCount"),
CodeBinaryOperatorType.ValueEquality,
new CodePrimitiveExpression(true));
CodeBinaryOperatorExpression compareLocationCountExpression = new CodeBinaryOperatorExpression(
new CodePropertyReferenceExpression(
new CodeVariableReferenceExpression("locationReferences"),
"Count"),
CodeBinaryOperatorType.LessThan,
new CodePrimitiveExpression(descriptor.NextMemberIndex)
);
CodeBinaryOperatorExpression checkLocationCountExpression = new CodeBinaryOperatorExpression(
shouldCheckLocationCountExpression,
CodeBinaryOperatorType.BooleanAnd,
compareLocationCountExpression);
CodeConditionStatement checkLocationCountStatement = new CodeConditionStatement(
checkLocationCountExpression,
new CodeMethodReturnStatement(
new CodePrimitiveExpression(false)));
validateMethod.Statements.Add(checkLocationCountStatement);
if (descriptor.NextMemberIndex > 0)
{
CodeConditionStatement generateNewOffset = new CodeConditionStatement(shouldCheckLocationCountExpression,
new CodeStatement[]
{
new CodeAssignStatement(new CodeVariableReferenceExpression("offset"),
new CodeBinaryOperatorExpression(
new CodePropertyReferenceExpression(new CodeVariableReferenceExpression("locationReferences"), "Count"),
CodeBinaryOperatorType.Subtract,
new CodePrimitiveExpression(descriptor.NextMemberIndex)))
});
validateMethod.Statements.Add(generateNewOffset);
}
CodeAssignStatement setexpectedLocationsCountStatement = new CodeAssignStatement(
new CodeVariableReferenceExpression("expectedLocationsCount"),
new CodePrimitiveExpression(descriptor.NextMemberIndex));
validateMethod.Statements.Add(setexpectedLocationsCountStatement);
foreach (KeyValuePair<string, MemberData> kvp in descriptor.Properties)
{
validateMethod.Statements.Add(GenerateLocationReferenceCheck(kvp.Value));
}
foreach (KeyValuePair<string, MemberData> kvp in descriptor.Fields)
{
validateMethod.Statements.Add(GenerateLocationReferenceCheck(kvp.Value));
}
if (this.compiledDataContexts.Count >= 1)
{
CompiledDataContextDescriptor baseDescriptor = this.compiledDataContexts.Peek();
CodeTypeDeclaration baseType = forReadOnly ? baseDescriptor.CodeTypeDeclarationForReadOnly : baseDescriptor.CodeTypeDeclaration;
CodeMethodInvokeExpression invokeBase = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(
new CodeTypeReferenceExpression(baseType.Name),
"Validate"),
new CodeVariableReferenceExpression("locationReferences"),
new CodePrimitiveExpression(false),
new CodeVariableReferenceExpression("offset"));
validateMethod.Statements.Add(
new CodeMethodReturnStatement(invokeBase));
}
else
{
validateMethod.Statements.Add(
new CodeMethodReturnStatement(
new CodePrimitiveExpression(true)));
}
if (forReadOnly)
{
descriptor.CodeTypeDeclarationForReadOnly.Members.Add(validateMethod);
}
else
{
descriptor.CodeTypeDeclaration.Members.Add(validateMethod);
}
}
CompiledDataContextDescriptor PushDataContextDescriptor()
{
CompiledDataContextDescriptor contextDescriptor = new CompiledDataContextDescriptor(() => this.IsVB)
{
CodeTypeDeclaration = GenerateCompiledDataContext(false),
CodeTypeDeclarationForReadOnly = GenerateCompiledDataContext(true),
NextMemberIndex = GetStartMemberIndex()
};
this.compiledDataContexts.Push(contextDescriptor);
this.nextContextId++;
return contextDescriptor;
}
CodeMemberMethod GenerateSetValueTypeValues(CompiledDataContextDescriptor descriptor)
{
CodeMemberMethod pushMethod = new CodeMemberMethod();
pushMethod.Name = setValueTypeValuesString;
pushMethod.Attributes = MemberAttributes.Override | MemberAttributes.Family;
foreach (KeyValuePair<string, MemberData> valueField in descriptor.Fields)
{
if (descriptor.Duplicates.Contains(valueField.Key))
{
continue;
}
CodeMethodInvokeExpression setValue = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(
new CodeThisReferenceExpression(),
"SetVariableValue"),
new CodeBinaryOperatorExpression(
new CodePrimitiveExpression(valueField.Value.Index),
CodeBinaryOperatorType.Add,
new CodeVariableReferenceExpression("locationsOffset")),
new CodeFieldReferenceExpression(
new CodeThisReferenceExpression(), valueField.Key));
pushMethod.Statements.Add(setValue);
}
pushMethod.Statements.Add(new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(
new CodeBaseReferenceExpression(),
pushMethod.Name)));
return pushMethod;
}
void GenerateExpressionGetTreeMethod(Activity activity, CompiledExpressionDescriptor expressionDescriptor, CompiledDataContextDescriptor dataContextDescriptor, bool isValue, bool isStatement, int nextExpressionId)
{
CodeMemberMethod expressionMethod = new CodeMemberMethod();
expressionMethod.Attributes = MemberAttributes.Assembly | MemberAttributes.Final;
expressionMethod.Name = string.Format(CultureInfo.InvariantCulture, expressionGetTreeString, nextExpressionId);
expressionMethod.ReturnType = new CodeTypeReference(typeof(Expression));
expressionDescriptor.GetExpressionTreeMethodName = expressionMethod.Name;
if (isStatement)
{
// Can't generate expression tree for a statement
expressionMethod.Statements.Add(new CodeMethodReturnStatement(new CodePrimitiveExpression(null)));
dataContextDescriptor.CodeTypeDeclaration.Members.Add(expressionMethod);
return;
}
string coreExpressionText = expressionDescriptor.ExpressionText;
CodeLinePragma pragma;
AlignText(activity, ref coreExpressionText, out pragma);
Type returnType = typeof(Expression<>).MakeGenericType(typeof(Func<>).MakeGenericType(expressionDescriptor.ResultType));
string expressionText = null;
if (IsVB)
{
expressionText = string.Concat(vbLambdaString, coreExpressionText);
}
else if (IsCS)
{
expressionText = string.Concat(csharpLambdaString, coreExpressionText);
}
if (expressionText != null)
{
CodeVariableDeclarationStatement statement = new CodeVariableDeclarationStatement(returnType, "expression", new CodeSnippetExpression(expressionText));
statement.LinePragma = pragma;
expressionMethod.Statements.Add(statement);
CodeMethodInvokeExpression invokeExpression = new CodeMethodInvokeExpression(
new CodeBaseReferenceExpression(),
"RewriteExpressionTree",
new CodeExpression[] { new CodeVariableReferenceExpression("expression") });
expressionMethod.Statements.Add(new CodeMethodReturnStatement(invokeExpression));
}
else
{
expressionMethod.Statements.Add(new CodeMethodReturnStatement(new CodePrimitiveExpression(null)));
}
if (isValue)
{
dataContextDescriptor.CodeTypeDeclarationForReadOnly.Members.Add(expressionMethod);
}
else
{
dataContextDescriptor.CodeTypeDeclaration.Members.Add(expressionMethod);
}
}
bool TryGenerateExpressionCode(Activity activity, CompiledDataContextDescriptor dataContextDescriptor, int nextExpressionId, string language)
{
ITextExpression textExpression = (ITextExpression)activity;
if (!TextExpression.LanguagesAreEqual(textExpression.Language, language)
|| string.IsNullOrWhiteSpace(textExpression.ExpressionText))
{
//
// We can only compile expressions that match the project's flavor
// and expression activities with no expressions don't need anything generated.
return false;
}
Type resultType = (activity is ActivityWithResult) ? ((ActivityWithResult)activity).ResultType : null;
string expressionText = textExpression.ExpressionText;
bool isReference = false;
bool isValue = false;
bool isStatement = false;
if (resultType == null)
{
isStatement = true;
}
else
{
isReference = TypeHelper.AreTypesCompatible(resultType, typeof(Location));
isValue = !isReference;
}
CodeTypeDeclaration typeDeclaration;
if (isValue)
{
typeDeclaration = dataContextDescriptor.CodeTypeDeclarationForReadOnly;
}
else
{
//
// Statement and reference get read/write context
typeDeclaration = dataContextDescriptor.CodeTypeDeclaration;
}
CompiledExpressionDescriptor descriptor = new CompiledExpressionDescriptor();
descriptor.TypeName = typeDeclaration.Name;
descriptor.Id = nextExpressionId;
descriptor.ExpressionText = textExpression.ExpressionText;
if (isReference)
{
if (resultType.IsGenericType)
{
resultType = resultType.GetGenericArguments()[0];
}
else
{
resultType = typeof(object);
}
}
descriptor.ResultType = resultType;
GenerateExpressionGetTreeMethod(activity, descriptor, dataContextDescriptor, isValue, isStatement, nextExpressionId);
if (isValue || isReference)
{
CodeMemberMethod expressionGetMethod = GenerateGetMethod(activity, resultType, expressionText, nextExpressionId);
typeDeclaration.Members.Add(expressionGetMethod);
CodeMemberMethod expressionGetValueTypeAccessorMethod = GenerateGetMethodWrapper(expressionGetMethod);
typeDeclaration.Members.Add(expressionGetValueTypeAccessorMethod);
descriptor.GetMethodName = expressionGetValueTypeAccessorMethod.Name;
}
if (isReference)
{
CodeMemberMethod expressionSetMethod = GenerateSetMethod(activity, resultType, expressionText, nextExpressionId);
dataContextDescriptor.CodeTypeDeclaration.Members.Add(expressionSetMethod);
CodeMemberMethod expressionSetValueTypeAccessorMethod = GenerateSetMethodWrapper(expressionSetMethod);
dataContextDescriptor.CodeTypeDeclaration.Members.Add(expressionSetValueTypeAccessorMethod);
descriptor.SetMethodName = expressionSetValueTypeAccessorMethod.Name;
}
if (isStatement)
{
CodeMemberMethod statementMethod = GenerateStatementMethod(activity, expressionText, nextExpressionId);
dataContextDescriptor.CodeTypeDeclaration.Members.Add(statementMethod);
CodeMemberMethod expressionSetValueTypeAccessorMethod = GenerateStatementMethodWrapper(statementMethod);
dataContextDescriptor.CodeTypeDeclaration.Members.Add(expressionSetValueTypeAccessorMethod);
descriptor.StatementMethodName = expressionSetValueTypeAccessorMethod.Name;
}
expressionDescriptors.Add(descriptor);
return true;
}
