S IAstVisitor <T, S> .VisitQueryJoinClause(QueryJoinClause queryJoinClause, T data)
{
var handler = QueryJoinClauseVisited;
if (handler != null)
{
handler(queryJoinClause, data);
}
return(VisitChildren(queryJoinClause, data));
}
protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
{
QueryJoinClause o = other as QueryJoinClause;
return(o != null && this.IsGroupJoin == o.IsGroupJoin &&
this.Type.DoMatch(o.Type, match) && MatchString(this.JoinIdentifier, o.JoinIdentifier) &&
this.InExpression.DoMatch(o.InExpression, match) && this.OnExpression.DoMatch(o.OnExpression, match) &&
this.EqualsExpression.DoMatch(o.EqualsExpression, match) &&
MatchString(this.IntoIdentifier, o.IntoIdentifier));
}
public override AstNode VisitQueryJoinClause(QueryJoinClause queryJoinClause)
{
Expression resultSelectorBody = null;
var inExpression = VisitNested(queryJoinClause.InExpression, null);
var key1SelectorFirstParam = CreateParameterForCurrentRangeVariable();
var key1Selector = CreateLambda(new[] { key1SelectorFirstParam }, VisitNested(queryJoinClause.OnExpression, key1SelectorFirstParam));
var key2Param = CreateParameter(Identifier.Create(queryJoinClause.JoinIdentifier));
var key2Selector = CreateLambda(new[] { key2Param }, VisitNested(queryJoinClause.EqualsExpression, null));
var resultSelectorFirstParam = CreateParameterForCurrentRangeVariable();
var select = GetNextQueryClause(queryJoinClause) as QuerySelectClause;
if (select != null)
{
resultSelectorBody = VisitNested(select.Expression, resultSelectorFirstParam);
eatSelect = true;
}
if (queryJoinClause.IntoKeyword.IsNull)
{
// Normal join
if (resultSelectorBody == null)
{
resultSelectorBody = AddMemberToCurrentTransparentType(resultSelectorFirstParam, queryJoinClause.JoinIdentifierToken, new IdentifierExpression(queryJoinClause.JoinIdentifier), false);
}
var resultSelector = CreateLambda(new[] { resultSelectorFirstParam, CreateParameter(Identifier.Create(queryJoinClause.JoinIdentifier)) }, resultSelectorBody);
rangeVariables[queryJoinClause.JoinIdentifierToken] = key2Param;
return(currentResult.Invoke("Join", inExpression, key1Selector, key2Selector, resultSelector));
}
else
{
// Group join
if (resultSelectorBody == null)
{
resultSelectorBody = AddMemberToCurrentTransparentType(resultSelectorFirstParam, queryJoinClause.IntoIdentifierToken, new IdentifierExpression(queryJoinClause.IntoIdentifier), false);
}
var intoParam = CreateParameter(Identifier.Create(queryJoinClause.IntoIdentifier));
var resultSelector = CreateLambda(new[] { resultSelectorFirstParam, intoParam }, resultSelectorBody);
rangeVariables[queryJoinClause.IntoIdentifierToken] = intoParam;
return(currentResult.Invoke("GroupJoin", inExpression, key1Selector, key2Selector, resultSelector));
}
}
void IAstVisitor.VisitQueryJoinClause(QueryJoinClause queryJoinClause)
{
Visit(EnterQueryJoinClause, LeaveQueryJoinClause, queryJoinClause);
}
