|
| 1 | +usingSystem; |
| 2 | +usingSystem.Collections.Generic; |
| 3 | + |
| 4 | +namespacePython.Runtime.Codecs |
| 5 | +{ |
| 6 | +classIterableDecoder:IPyObjectDecoder |
| 7 | +{ |
| 8 | +internalstaticboolIsIterable(TypetargetType) |
| 9 | +{ |
| 10 | +//if it is a plain IEnumerable, we can decode it using sequence protocol. |
| 11 | +if(targetType==typeof(System.Collections.IEnumerable)) |
| 12 | +returntrue; |
| 13 | + |
| 14 | +if(!targetType.IsGenericType) |
| 15 | +returnfalse; |
| 16 | + |
| 17 | +returntargetType.GetGenericTypeDefinition()==typeof(IEnumerable<>); |
| 18 | +} |
| 19 | + |
| 20 | +internalstaticboolIsIterable(PyObjectobjectType) |
| 21 | +{ |
| 22 | +//TODO - do I need to decref iterObject? |
| 23 | +IntPtriterObject=Runtime.PyObject_GetIter(objectType.Handle); |
| 24 | +returniterObject!=IntPtr.Zero; |
| 25 | +} |
| 26 | + |
| 27 | +publicboolCanDecode(PyObjectobjectType,TypetargetType) |
| 28 | +{ |
| 29 | +returnIsIterable(objectType)&&IsIterable(targetType); |
| 30 | +} |
| 31 | + |
| 32 | +publicboolTryDecode<T>(PyObjectpyObj,outTvalue) |
| 33 | +{ |
| 34 | +//first see if T is a plan IEnumerable |
| 35 | +if(typeof(T)==typeof(System.Collections.IEnumerable)) |
| 36 | +{ |
| 37 | +objectenumerable=newCollectionWrappers.IterableWrapper<object>(pyObj); |
| 38 | +value=(T)enumerable; |
| 39 | +returntrue; |
| 40 | +} |
| 41 | + |
| 42 | +varelementType=typeof(T).GetGenericArguments()[0]; |
| 43 | +varcollectionType=typeof(CollectionWrappers.IterableWrapper<>).MakeGenericType(elementType); |
| 44 | + |
| 45 | +varinstance=Activator.CreateInstance(collectionType,new[]{pyObj}); |
| 46 | +value=(T)instance; |
| 47 | +returntrue; |
| 48 | +} |
| 49 | + |
| 50 | +publicstaticIterableDecoderInstance{get;}=newIterableDecoder(); |
| 51 | + |
| 52 | +publicstaticvoidRegister() |
| 53 | +{ |
| 54 | +PyObjectConversions.RegisterDecoder(Instance); |
| 55 | +} |
| 56 | +} |
| 57 | +} |