public sealed override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved,
ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull("expressionToBeResolved", expressionToBeResolved);
// UnionResultOperator is a query source, so expressions resolve their input parameter with the UnionResultOperator created by this node.
return(QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(this, inputParameter,
expressionToBeResolved, clauseGenerationContext));
}
public override Expression Resolve(
ParameterExpression inputParameter, Expression expressionToBeResolved,
ClauseGenerationContext clauseGenerationContext)
{
return(QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(
this,
inputParameter,
expressionToBeResolved,
clauseGenerationContext));
}
public Expression GetResolvedResultSelector(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedResultSelector.GetOrCreate(
r => r.GetResolvedExpression(
QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(
this,
ResultSelector.Parameters[1],
ResultSelector.Body,
clauseGenerationContext),
ResultSelector.Parameters[0],
clauseGenerationContext)));
}
public Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved,
ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull("expressionToBeResolved", expressionToBeResolved);
// query sources resolve into references that point back to the respective clauses
return(QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(
this,
inputParameter,
expressionToBeResolved,
clauseGenerationContext));
}
public Expression GetResolvedResultSelector(ClauseGenerationContext clauseGenerationContext)
{
// our result selector usually looks like this: (i, j) => new { i = i, j = j }
// with the data for i coming from the previous node and j identifying the data from this node
// we resolve the selector by first substituting j by a QuerySourceReferenceExpression pointing back to us, before asking the previous node
// to resolve i
return(_cachedResultSelector.GetOrCreate(
r => r.GetResolvedExpression(
QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(
this,
ResultSelector.Parameters[1],
ResultSelector.Body,
clauseGenerationContext),
ResultSelector.Parameters[0],
clauseGenerationContext)));
}
