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]);
JoinExpressionNode = new JoinExpressionNode(parseInfo, innerSequence, outerKeySelector, innerKeySelector, joinResultSelector);
ResultSelector = resultSelector;
_cachedResultSelector = new ResolvedExpressionCache <Expression> (this);
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
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);
return(queryModel);
}