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xerxesb/llblgen-in-memory-predicate-filtering.cs

Created August 25, 2012 04:29
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  1. xerxesb created this gist Aug 25, 2012.
    32 changes: 32 additions & 0 deletions llblgen-in-memory-predicate-filtering.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,32 @@
    public IEntityCollection2 FilterEntities(IEntityCollection2 collection, IRelationPredicateBucket filterBucket)
    {
    collection.DefaultView.Filter = filterBucket.PredicateExpression; // only works for basic filter expressions
    return collection.DefaultView.ToEntityCollection();

    /*
    // say goodbye to all this shitty code.
    var result = CreateEntityCollection(EntityType(collection));
    var filterField = "";
    object filterValue = null;
    if (filterBucket.PredicateExpression[0].Contents is PredicateExpression)
    {
    filterField = ((FieldCompareValuePredicate)((PredicateExpression)filterBucket.PredicateExpression[0].Contents)[0].Contents).FieldCore.Alias;
    filterValue = ((FieldCompareValuePredicate)((PredicateExpression)filterBucket.PredicateExpression[0].Contents)[0].Contents).Value;
    }
    else
    {
    filterField = ((FieldCompareRangePredicate)filterBucket.PredicateExpression[0].Contents).FieldCore.Alias;
    filterValue = ((FieldCompareRangePredicate)filterBucket.PredicateExpression[0].Contents).Values[0];
    }
    foreach (IEntity2 entity in collection)
    {
    if (entity.Fields[filterField].CurrentValue.Equals(filterValue))
    {
    result.Add(entity);
    }
    }
    return result;
    */ }