TupleDescriptor.h Source File (original) (raw)

00001 00002 00003 00004 00005 00006 00007 00008 00009 00010 00011 00012 00013 00014 00015 00016 00017 00018 00019 00020 00021 00022 00023 00024 #ifndef Fennel_TupleDescriptor_Included 00025 #define Fennel_TupleDescriptor_Included 00026 00027 #include 00028 00029 FENNEL_BEGIN_NAMESPACE 00030 00031 class StoredTypeDescriptor; 00032 class StoredTypeDescriptorFactory; 00033 class TupleData; 00034 class ByteOutputStream; 00035 class ByteInputStream; 00036 class DataVisitor; 00037 00042 struct FENNEL_TUPLE_EXPORT TupleAttributeDescriptor 00043 { 00044 StoredTypeDescriptor const *pTypeDescriptor; 00045 bool isNullable; 00046 TupleStorageByteLength cbStorage; 00047 00048 explicit TupleAttributeDescriptor(); 00049 00050 explicit TupleAttributeDescriptor( 00051 StoredTypeDescriptor const &typeDescriptor, 00052 bool isNullable = false, 00053 TupleStorageByteLength cbStorage = 0); 00054 00055 bool operator == (TupleAttributeDescriptor const &other) const; 00056 }; 00057 00062 class FENNEL_TUPLE_EXPORT TupleProjection 00063 : public VectorOfUint 00064 { 00065 public: 00066 void writePersistent( 00067 ByteOutputStream &) const; 00068 00069 void readPersistent( 00070 ByteInputStream &); 00071 00072 void projectFrom( 00073 TupleProjection const &sourceProjection, 00074 TupleProjection const &tupleProjection); 00075 }; 00076 00089 class FENNEL_TUPLE_EXPORT TupleDescriptor 00090 : public std::vector 00091 { 00092 public: 00093 void projectFrom( 00094 TupleDescriptor const &tupleDescriptor, 00095 TupleProjection const &tupleProjection); 00096 00097
00098 int compareTuplesKey( 00099 TupleData const &tuple1, 00100 TupleData const &tuple2, 00101 uint keyCount) const; 00102 00103 int compareTuples( 00104 TupleData const &tuple1, 00105 TupleData const &tuple2) const; 00106 00107 int compareTuples( 00108 TupleData const &tuple1, TupleProjection const &proj1, 00109 TupleData const &tuple2, TupleProjection const &proj2, 00110 bool *containsNullKey = NULL) const; 00111 00112 void writePersistent( 00113 ByteOutputStream &) const; 00114 00115 void readPersistent( 00116 ByteInputStream &, 00117 StoredTypeDescriptorFactory const &); 00118 00119 void visit( 00120 TupleData const &tuple, 00121 DataVisitor &dataVisitor, 00122 bool visitLengths) const; 00123 00124 bool containsNullable() const; 00125 00127 bool storageEqual( 00128 TupleDescriptor const &other) const; 00129 TupleStorageByteLength getMaxByteCount() const; 00130 }; 00131 00132 FENNEL_TUPLE_EXPORT std::ostream & operator<< ( 00133 std::ostream &str,TupleDescriptor const &); 00134 00135 FENNEL_TUPLE_EXPORT std::ostream & operator<< ( 00136 std::ostream &str,TupleAttributeDescriptor const &); 00137 00138 FENNEL_END_NAMESPACE 00139 00140 #endif 00141 00142