public GroupJoinExpressionNode(
MethodCallExpressionParseInfo parseInfo,
Expression innerSequence,
LambdaExpression outerKeySelector,
LambdaExpression innerKeySelector,
LambdaExpression resultSelector)
: base(parseInfo)
{
ArgumentUtility.CheckNotNull("innerSequence", innerSequence);
ArgumentUtility.CheckNotNull("outerKeySelector", outerKeySelector);
ArgumentUtility.CheckNotNull("innerKeySelector", innerKeySelector);
ArgumentUtility.CheckNotNull("resultSelector", resultSelector);
if (outerKeySelector.Parameters.Count != 1)
{
throw new ArgumentException("Outer key selector must have exactly one parameter.", "outerKeySelector");
}
if (innerKeySelector.Parameters.Count != 1)
{
throw new ArgumentException("Inner key selector must have exactly one parameter.", "innerKeySelector");
}
if (resultSelector.Parameters.Count != 2)
{
throw new ArgumentException("Result selector must have exactly two parameters.", "resultSelector");
}
var joinResultSelector = Expression.Lambda(Expression.Constant(null), outerKeySelector.Parameters[0],
innerKeySelector.Parameters[0]);
#pragma warning disable 618
JoinExpressionNode = new JoinExpressionNode(parseInfo, innerSequence, outerKeySelector, innerKeySelector,
joinResultSelector);
#pragma warning restore 618
ParsedExpression = parseInfo.ParsedExpression;
InnerSequence = innerSequence;
OuterKeySelector = outerKeySelector;
InnerKeySelector = innerKeySelector;
ResultSelector = resultSelector;
_cachedResultSelector = new ResolvedExpressionCache <Expression>(this);
}
protected override void ApplyNodeSpecificSemantics(QueryModel queryModel,
ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var joinResultSelector = Expression.Lambda(Expression.Constant(null), OuterKeySelector.Parameters[0],
InnerKeySelector.Parameters[0]);
var joinParseInfo = new MethodCallExpressionParseInfo(AssociatedIdentifier, Source, ParsedExpression);
var joinExpressionNode = new JoinExpressionNode(joinParseInfo, InnerSequence, OuterKeySelector,
InnerKeySelector, joinResultSelector);
var joinClause = joinExpressionNode.CreateJoinClause(clauseGenerationContext);
var groupJoinClause = new GroupJoinClause(ResultSelector.Parameters[1].Name,
ResultSelector.Parameters[1].Type, joinClause);
clauseGenerationContext.AddContextInfo(this, groupJoinClause);
queryModel.BodyClauses.Add(groupJoinClause);
var selectClause = queryModel.SelectClause;
selectClause.Selector = GetResolvedResultSelector(clauseGenerationContext);
}
