private void Compile()
{
if (DataContext == null)
{
throw ExceptionBuilder.PropertyNotInitialized("DataContext");
}
if (Text == null || Text.Length == 0)
{
throw ExceptionBuilder.PropertyNotInitialized("Text");
}
// Compile query
ClearCompiledState();
Compiler compiler = new Compiler(_errorCollector);
_resultAlgebraNode = compiler.CompileQuery(Text, Scope);
if (_errorCollector.ErrorsSeen)
{
IList <CompilationError> errors = _errorCollector.GetErrors();
OnCompilationFailed(new CompilationFailedEventArgs(errors));
throw ExceptionBuilder.QueryCompilationFailed(errors);
}
OnCompilationSucceeded(EventArgs.Empty);
_resultIterator = IteratorCreator.Convert(DataContext.MetadataContext, true, _resultAlgebraNode);
}
//constructor
public Itermediary(IteratorCreator songIterator)
{
this.songIterator = songIterator;
example = new ObservableCollection <Song>();
}
