public static ExpressionTranslationResult TranslateLambda(LambdaExpression lambda, SimpleType[] parameterTypes, QueryAnalysisContext context)
{
if (parameterTypes.Length != lambda.Parameters.Count)
{
throw new Exception("The number of parameter types must match the number of parameters in the lambda.");
}
var newContext = new QueryAnalysisContext(context.TypeTranslationUtil, context.ParameterDictionary);
//translatedParams are the new parameters that will be used in the lambda.
var translatedParams = new List <ParameterExpression>();
for (int i = 0; i < lambda.Parameters.Count; i++)
{
var newParam = parameterTypes[i].GetParameter(lambda.Parameters[i].Name);
var paramReplacement = new ParameterReplacement
{
//replacementExpression will be a MemberExpression if the projection is modified.
// since the original parameter has become Field0.
ReplacementExpression = parameterTypes[i].GetTranslatedParameterOrMember(newParam),
Type = parameterTypes[i].GetOriginalQueryableType()
};
newContext.ParameterDictionary.Add(lambda.Parameters[i], paramReplacement);
translatedParams.Add(newParam);
}
var lambdaBody = new QueryTranslationVisitor(newContext).Translate(lambda.Body);
var result = Expression.Lambda(lambdaBody, translatedParams.ToArray());
return(new ExpressionTranslationResult(result, newContext.QueryableType));
}
public static ExpressionTranslationResult VisitWithNewVisitor(Expression expression, QueryAnalysisContext outerContext, bool modifyProjection)
{
var newContext = new QueryAnalysisContext(outerContext.TypeTranslationUtil)
{
ModifyProjection = modifyProjection
};
foreach (var kvp in outerContext.ParameterDictionary)
{
newContext.ParameterDictionary.Add(kvp.Key, kvp.Value);
}
var result = new QueryTranslationVisitor(newContext).Translate(expression);
return(new ExpressionTranslationResult(result, newContext.QueryableType));
}
public static ExpressionTranslationResult VisitWithNewVisitor(Expression expression, QueryAnalysisContext outerContext, bool modifyProjection)
{
var newContext = new QueryAnalysisContext(outerContext.TypeTranslationUtil) { ModifyProjection = modifyProjection };
foreach (var kvp in outerContext.ParameterDictionary) newContext.ParameterDictionary.Add(kvp.Key, kvp.Value);
var result = new QueryTranslationVisitor(newContext).Translate(expression);
return new ExpressionTranslationResult(result, newContext.QueryableType);
}
public static ExpressionTranslationResult TranslateLambda(LambdaExpression lambda, SimpleType[] parameterTypes, QueryAnalysisContext context)
{
if (parameterTypes.Length != lambda.Parameters.Count)
throw new Exception("The number of parameter types must match the number of parameters in the lambda.");
var newContext = new QueryAnalysisContext(context.TypeTranslationUtil, context.ParameterDictionary);
//translatedParams are the new parameters that will be used in the lambda.
var translatedParams = new List<ParameterExpression>();
for (int i = 0; i < lambda.Parameters.Count; i++)
{
var newParam = parameterTypes[i].GetParameter(lambda.Parameters[i].Name);
var paramReplacement = new ParameterReplacement
{
//replacementExpression will be a MemberExpression if the projection is modified.
// since the original parameter has become Field0.
ReplacementExpression = parameterTypes[i].GetTranslatedParameterOrMember(newParam),
Type = parameterTypes[i].GetOriginalQueryableType()
};
newContext.ParameterDictionary.Add(lambda.Parameters[i], paramReplacement);
translatedParams.Add(newParam);
}
var lambdaBody = new QueryTranslationVisitor(newContext).Translate(lambda.Body);
var result = Expression.Lambda(lambdaBody, translatedParams.ToArray());
return new ExpressionTranslationResult(result, newContext.QueryableType);
}