public virtual IEnumerable <T> ApplyFilter <T>([NotNull] IEnumerable <T> source, [NotNull] string filterExpression)
{
Assert.ArgumentNotNull(source, "source");
Assert.ArgumentNotNull(filterExpression, "filterExpression");
SpeakDateTimeExtractor extractor = new SpeakDateTimeExtractor();
filterExpression = extractor.Extract(filterExpression);
SpeakFreeTextSearchExtractor <T> freeTextSearchExtractor = new SpeakFreeTextSearchExtractor <T>();
filterExpression = freeTextSearchExtractor.Extract(filterExpression);
SpeakExpressionLocalizer localizer = new SpeakExpressionLocalizer();
filterExpression = localizer.Update(filterExpression);
IEnumerable <string> references = new[] { Assembly.GetAssembly(typeof(Order)).Location, Assembly.GetAssembly(typeof(Queryable)).Location };
string code = string.Format(CodeTemplate, typeof(IQueryable <T>).IsAssignableFrom(source.GetType()) ? "System.Linq.IQueryable" : "System.Collections.Generic.IEnumerable", typeof(T).FullName, filterExpression);
Script script = ScriptFactory.Compile(filterExpression, references, code, "C#");
Assert.IsTrue(script.IsValid, "Unable to apply the filter. Expression compilation failed.");
return(script.InvokeDefaultMethod <IEnumerable <T> >(source));
}
/// <summary>
/// Applies the expression as filter.
/// </summary>
/// <typeparam name="T">the type.</typeparam>
/// <param name="source">The source.</param>
/// <param name="filterExpression">The filter expression.</param>
/// <returns>object that has been filtered by</returns>
public virtual object ApplyExpressionAsFilter <T>([NotNull] IQueryable <T> source, [NotNull] string filterExpression)
{
Assert.ArgumentNotNull(source, "source");
Assert.ArgumentNotNull(filterExpression, "filterExpression");
ICollection <string> references = new HashSet <string>();
this.PopulateSetWithReferencedAssembliesLocations(typeof(T), references);
this.PopulateSetWithReferencedAssembliesLocations(typeof(IQueryable), references);
var code = string.Format(CodeTemplateForFilter, "IQueryable", this.BuildTypeName(typeof(T)), string.Format(this.FixCasing(filterExpression), "source"));
var script = ScriptFactory.Compile(filterExpression, references, code, "C#");
Assert.IsTrue(script.IsValid, "Unable to apply the filter. Expression compilation failed.");
return(script.InvokeDefaultMethod <object>(source));
}
