|
| 1 | +namespacePython.Runtime.Codecs |
| 2 | +{ |
| 3 | +usingSystem; |
| 4 | +usingSystem.Collections.Generic; |
| 5 | +usingSystem.Linq; |
| 6 | +usingSystem.Reflection; |
| 7 | + |
| 8 | +publicsealedclassTupleCodec<TTuple>:IPyObjectEncoder,IPyObjectDecoder |
| 9 | +{ |
| 10 | +TupleCodec(){} |
| 11 | +publicstaticTupleCodec<TTuple>Instance{get;}=newTupleCodec<TTuple>(); |
| 12 | + |
| 13 | +publicboolCanEncode(Typetype) |
| 14 | +=>type.Namespace==typeof(TTuple).Namespace&&type.Name.StartsWith(typeof(TTuple).Name+'`') |
| 15 | +||type==typeof(object)||type==typeof(TTuple); |
| 16 | + |
| 17 | +publicPyObjectTryEncode(objectvalue) |
| 18 | +{ |
| 19 | +if(value==null)returnnull; |
| 20 | + |
| 21 | +vartupleType=value.GetType(); |
| 22 | +if(tupleType==typeof(object))returnnull; |
| 23 | +if(!this.CanEncode(tupleType))returnnull; |
| 24 | +if(tupleType==typeof(TTuple))returnnewPyTuple(); |
| 25 | + |
| 26 | +longfieldCount=tupleType.GetGenericArguments().Length; |
| 27 | +vartuple=Runtime.PyTuple_New(fieldCount); |
| 28 | +Exceptions.ErrorCheck(tuple); |
| 29 | +intfieldIndex=0; |
| 30 | +foreach(FieldInfofieldintupleType.GetFields()) |
| 31 | +{ |
| 32 | +varitem=field.GetValue(value); |
| 33 | +IntPtrpyItem=Converter.ToPython(item); |
| 34 | +Runtime.XIncref(pyItem); |
| 35 | +Runtime.PyTuple_SetItem(tuple,fieldIndex,pyItem); |
| 36 | +fieldIndex++; |
| 37 | +} |
| 38 | +returnnewPyTuple(Runtime.SelfIncRef(tuple)); |
| 39 | +} |
| 40 | + |
| 41 | +publicboolCanDecode(PyObjectobjectType,TypetargetType) |
| 42 | +=>objectType.Handle==Runtime.PyTuple&&this.CanEncode(targetType); |
| 43 | + |
| 44 | +publicboolTryDecode<T>(PyObjectpyObj,outTvalue) |
| 45 | +{ |
| 46 | +if(pyObj==null)thrownewArgumentNullException(nameof(pyObj)); |
| 47 | + |
| 48 | +value=default; |
| 49 | + |
| 50 | +if(!Runtime.PyTuple_Check(pyObj.Handle))returnfalse; |
| 51 | + |
| 52 | +if(typeof(T)==typeof(object)) |
| 53 | +{ |
| 54 | +boolconverted=Decode(pyObj,outobjectresult); |
| 55 | +if(converted) |
| 56 | +{ |
| 57 | +value=(T)result; |
| 58 | +returntrue; |
| 59 | +} |
| 60 | + |
| 61 | +returnfalse; |
| 62 | +} |
| 63 | + |
| 64 | +varitemTypes=typeof(T).GetGenericArguments(); |
| 65 | +longitemCount=Runtime.PyTuple_Size(pyObj.Handle); |
| 66 | +if(itemTypes.Length!=itemCount)returnfalse; |
| 67 | + |
| 68 | +if(itemCount==0) |
| 69 | +{ |
| 70 | +value=(T)EmptyTuple; |
| 71 | +returntrue; |
| 72 | +} |
| 73 | + |
| 74 | +varelements=newobject[itemCount]; |
| 75 | +for(intitemIndex=0;itemIndex<itemTypes.Length;itemIndex++) |
| 76 | +{ |
| 77 | +IntPtrpyItem=Runtime.PyTuple_GetItem(pyObj.Handle,itemIndex); |
| 78 | +if(!Converter.ToManaged(pyItem,itemTypes[itemIndex],outelements[itemIndex],setError:false)) |
| 79 | +{ |
| 80 | +returnfalse; |
| 81 | +} |
| 82 | +} |
| 83 | +varfactory=tupleCreate[itemCount].MakeGenericMethod(itemTypes); |
| 84 | +value=(T)factory.Invoke(null,elements); |
| 85 | +returntrue; |
| 86 | +} |
| 87 | + |
| 88 | +staticboolDecode(PyObjecttuple,outobjectvalue) |
| 89 | +{ |
| 90 | +longitemCount=Runtime.PyTuple_Size(tuple.Handle); |
| 91 | +if(itemCount==0) |
| 92 | +{ |
| 93 | +value=EmptyTuple; |
| 94 | +returntrue; |
| 95 | +} |
| 96 | +varelements=newobject[itemCount]; |
| 97 | +varitemTypes=newType[itemCount]; |
| 98 | +value=null; |
| 99 | +for(intitemIndex=0;itemIndex<elements.Length;itemIndex++) |
| 100 | +{ |
| 101 | +varpyItem=Runtime.PyTuple_GetItem(tuple.Handle,itemIndex); |
| 102 | +if(!Converter.ToManaged(pyItem,typeof(object),outelements[itemIndex],setError:false)) |
| 103 | +{ |
| 104 | +returnfalse; |
| 105 | +} |
| 106 | + |
| 107 | +itemTypes[itemIndex]=elements[itemIndex]?.GetType()??typeof(object); |
| 108 | +} |
| 109 | + |
| 110 | +varfactory=tupleCreate[itemCount].MakeGenericMethod(itemTypes); |
| 111 | +value=factory.Invoke(null,elements); |
| 112 | +returntrue; |
| 113 | +} |
| 114 | + |
| 115 | +staticreadonlyMethodInfo[]tupleCreate= |
| 116 | +typeof(TTuple).GetMethods(BindingFlags.Public|BindingFlags.Static) |
| 117 | +.Where(m=>m.Name==nameof(Tuple.Create)) |
| 118 | +.OrderBy(m=>m.GetParameters().Length) |
| 119 | +.ToArray(); |
| 120 | + |
| 121 | +staticreadonlyobjectEmptyTuple=tupleCreate[0].Invoke(null,parameters:newobject[0]); |
| 122 | + |
| 123 | +publicstaticvoidRegister() |
| 124 | +{ |
| 125 | +PyObjectConversions.RegisterEncoder(Instance); |
| 126 | +PyObjectConversions.RegisterDecoder(Instance); |
| 127 | +} |
| 128 | +} |
| 129 | +} |