I'm trying to implement the following (test cases below)
[Test]
public void CanGetTypeWhere() {
// what about dynamic type checking? OfType is generic
and won't allow for it
var query = (from o in session.Query<Animal>()
where o.GetType() == typeof(Dog)
select o).ToList();
Assert.AreEqual(2, query.Count);
}
[Test]
public void CanSelectWithGetType()
{
var query = (from o in session.Query<Animal>()
select new {
Id = o.Id,
Type = o.GetType()
}).ToList();
Assert.Greater(0, query.Count);
}
I've almost got test #2 working using the following, however, I can't
figure out who to intercept the Int to Type cast at the other end. It
fails at the result transformer at the moment:
private FunctionRegistry()
{
// TODO - could use reflection here
Register(new QueryableGenerator());
Register(new StringGenerator());
Register(new DateTimeGenerator());
Register(new ICollectionGenerator());
RegisterMethodGenerator(
ReflectionHelper.GetMethod((object o) => o.GetType()),
new GetTypeGenerator()
);
}
public class GetTypeGenerator : BaseHqlGeneratorForMethod
{
public GetTypeGenerator()
{
SupportedMethods = new [] {
ReflectionHelper.GetMethod<object>(o => o.GetType())
};
}
public override HqlTreeNode BuildHql(MethodInfo method,
Expression targetObject, ReadOnlyCollection<Expression> arguments,
HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
return treeBuilder.Dot(
visitor.Visit(targetObject).AsExpression(),
treeBuilder.Class()
);
}
}
Perhaps I am going about this the wrong way!? Any suggestions?
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