public CompiledExpressionInvoker(ITextExpression expression, bool isReference, CodeActivityMetadata metadata)
{
if (metadata == null)
{
throw FxTrace.Exception.ArgumentNull(nameof(metadata));
}
this.expressionId = -1;
this.textExpression = expression ?? throw FxTrace.Exception.ArgumentNull(nameof(expression));
this.expressionActivity = expression as Activity;
this.isReference = isReference;
this.locationReferences = new List <LocationReference>();
this.metadata = metadata;
this.accessor = CodeActivityPublicEnvironmentAccessor.Create(this.metadata);
if (this.expressionActivity == null)
{
throw FxTrace.Exception.Argument(nameof(expression), SR.ITextExpressionParameterMustBeActivity);
}
var resultActivity = this.expressionActivity as ActivityWithResult;
this.metadataRoot = metadata.Environment.Root;
this.ProcessLocationReferences();
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
CodeActivityPublicEnvironmentAccessor publicAccessor = CodeActivityPublicEnvironmentAccessor.Create(metadata);
// We need to rewrite the tree.
Expression newTree;
if (ExpressionUtilities.TryRewriteLambdaExpression(_locationExpression, out newTree, publicAccessor, true))
{
_rewrittenTree = (Expression <Func <ActivityContext, T> >)newTree;
}
else
{
_rewrittenTree = _locationExpression;
}
// inspect the expressionTree to see if it is a valid location expression(L-value)
string extraErrorMessage = null;
if (!ExpressionUtilities.IsLocation(_rewrittenTree, typeof(T), out extraErrorMessage))
{
string errorMessage = SR.InvalidLValueExpression;
if (extraErrorMessage != null)
{
errorMessage += ":" + extraErrorMessage;
}
metadata.AddValidationError(errorMessage);
}
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
CodeActivityPublicEnvironmentAccessor publicAccessor = CodeActivityPublicEnvironmentAccessor.Create(metadata);
// We need to rewrite the tree.
if (ExpressionUtilities.TryRewriteLambdaExpression(this.lambdaValue, out Expression newTree, publicAccessor))
{
this.rewrittenTree = (Expression <Func <ActivityContext, TResult> >)newTree;
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
var publicAccessor = CodeActivityPublicEnvironmentAccessor.Create(metadata);
// We need to rewrite the tree.
if (ExpressionUtilities.TryRewriteLambdaExpression(this.locationExpression, out var newTree, publicAccessor, true))
{
this.rewrittenTree = (Expression <Func <ActivityContext, T> >)newTree;
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
expressionTree = null;
invoker = new CompiledExpressionInvoker(this, true, metadata);
if (metadata.Environment.CompileExpressions)
{
return;
}
string validationError;
// If ICER is not implemented that means we haven't been compiled
var publicAccessor = CodeActivityPublicEnvironmentAccessor.Create(metadata);
expressionTree = CompileLocationExpression(publicAccessor, out validationError);
if (validationError != null)
{
metadata.AddValidationError(validationError);
}
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
expressionTree = null;
invoker = new CompiledExpressionInvoker(this, false, metadata);
if (metadata.Environment.CompileExpressions)
{
return;
}
// If ICER is not implemented that means we haven't been compiled
var publicAccessor = CodeActivityPublicEnvironmentAccessor.Create(metadata);
try
{
expressionTree = VisualBasicHelper.Compile <TResult>(this.ExpressionText, publicAccessor, false);
}
catch (SourceExpressionException e)
{
metadata.AddValidationError(e.Message);
}
}
