/// <summary>
/// Initializes a new instance of the ClrBasedQueryProvider type
/// </summary>
/// <param name="clrTypesAssembly">The assembly which contains the clr types for resource types</param>
/// <param name="modelSchema">The schema for the model under test</param>
/// <param name="evaluator">The evaluator to evaluate queries created after resolution</param>
/// <param name="repository">The query repository to find root queries in</param>
public ClrBasedQueryProvider(Assembly clrTypesAssembly, EntityModelSchema modelSchema, IQueryExpressionEvaluator evaluator, QueryRepository repository)
{
this.clrTypesAssembly = clrTypesAssembly;
this.modelSchema = modelSchema;
this.evaluator = evaluator;
this.queryRepository = repository;
}
public static QueryValue ChooseRandomEvaluationResult(this IQueryExpressionEvaluator evaluator, QueryExpression queryExpression, IRandomNumberGenerator random, out QueryCollectionValue collection)
{
ExceptionUtilities.CheckArgumentNotNull(evaluator, "evaluator");
ExceptionUtilities.CheckArgumentNotNull(queryExpression, "queryExpression");
ExceptionUtilities.CheckArgumentNotNull(random, "random");
collection = evaluator.Evaluate(queryExpression) as QueryCollectionValue;
ExceptionUtilities.CheckObjectNotNull(collection, "Query unexpectedly evaluated to null or was not a collection: {0}", queryExpression);
ExceptionUtilities.Assert(collection.EvaluationError == null, "Query resulted in evaluation error: {0}", collection.EvaluationError);
if (collection.IsNull || collection.Elements.Count == 0)
{
return(null);
}
return(random.ChooseFrom(collection.Elements));
}
/// <summary>
/// Evaluates the given query, asserts that it results in a collection value, and chooses a random element from the collection. If the collection is empty, null is returned.
/// </summary>
/// <param name="evaluator">The query evaluator to use</param>
/// <param name="queryExpression">The query to evaluate, must result in a collection</param>
/// <param name="random">The random number generator to use for selecting a result from the collection</param>
/// <returns>A random element of the evaluated collection, or null if no elements are found</returns>
public static QueryValue ChooseRandomEvaluationResult(this IQueryExpressionEvaluator evaluator, QueryExpression queryExpression, IRandomNumberGenerator random)
{
QueryCollectionValue collection;
return(evaluator.ChooseRandomEvaluationResult(queryExpression, random, out collection));
}
/// <summary>
/// Initializes a new instance of the ClrBasedQueryProvider type
/// </summary>
/// <param name="clrTypesAssembly">The assembly which contains the clr types for resource types</param>
/// <param name="modelSchema">The schema for the model under test</param>
/// <param name="evaluator">The evaluator to evaluate queries created after resolution</param>
/// <param name="repository">The query repository to find root queries in</param>
public ClrBasedQueryProvider(Assembly clrTypesAssembly, EntityModelSchema modelSchema, IQueryExpressionEvaluator evaluator, QueryRepository repository)
{
this.clrTypesAssembly = clrTypesAssembly;
this.modelSchema = modelSchema;
this.evaluator = evaluator;
this.queryRepository = repository;
}
