/// <summary>
/// Gets the resulting type of a query.
/// </summary>
/// <param name="querySchema">A description of a query.</param>
/// <returns>The input type for the given query as determined by the source.</returns>
internal String GetSourceType(QuerySchema querySchema)
{
// Search through the sibling queries until the source is found and return the resulting type of that query.
foreach (QuerySchema innerQuerySchema in this.querySchemaList)
{
if (innerQuerySchema.Name == querySchema.Source)
{
return(innerQuerySchema.ResultType);
}
}
// An attempt was made to use and implicit source type from a sibling query that doesn't exist.
throw new Exception(String.Format("The source is not defined for Query {0}", querySchema.Name));
}
/// <summary>
/// Gets the previous source in the list of QuerySchema items.
/// </summary>
/// <param name="querySchema">A description of a query.</param>
/// <returns>The name of the previous source in the list of queries associated with ths property.</returns>
internal String GetPreviousSource(QuerySchema querySchema)
{
// When an item is found that matches the given query item, return the name of the previous query item. This is used
// to chain together query items with the implicit source coming from the previous item in the list.
for (int queryIndex = 1; queryIndex < this.querySchemaList.Count; queryIndex++)
{
QuerySchema innerQuerySchema = this.querySchemaList[queryIndex];
if (innerQuerySchema == querySchema)
{
return(this.querySchemaList[queryIndex - 1].Name);
}
}
// An attempt was made to use a query item without an explicit source or an implicit previous source.
throw new Exception(String.Format("The source is not defined for Query {0}", querySchema.Name));
}