public RelDataType createType(Type type) {
if (type instanceof RelDataType) {
return (RelDataType) type;
}
if (type instanceof SyntheticRecordType) {
final SyntheticRecordType syntheticRecordType = (SyntheticRecordType) type;
return syntheticRecordType.relType;
}
if (type instanceof Types.ArrayType) {
final Types.ArrayType arrayType = (Types.ArrayType) type;
final RelDataType componentRelType = createType(arrayType.getComponentType());
return createArrayType(
createTypeWithNullability(componentRelType, arrayType.componentIsNullable()),
arrayType.maximumCardinality());
}
if (type instanceof Types.MapType) {
final Types.MapType mapType = (Types.MapType) type;
final RelDataType keyRelType = createType(mapType.getKeyType());
final RelDataType valueRelType = createType(mapType.getValueType());
return createMapType(
createTypeWithNullability(keyRelType, mapType.keyIsNullable()),
createTypeWithNullability(valueRelType, mapType.valueIsNullable()));
}
if (!(type instanceof Class)) {
throw new UnsupportedOperationException("TODO: implement " + type);
}
final Class clazz = (Class) type;
switch (Primitive.flavor(clazz)) {
case PRIMITIVE:
return createJavaType(clazz);
case BOX:
return createJavaType(Primitive.ofBox(clazz).boxClass);
}
if (JavaToSqlTypeConversionRules.instance().lookup(clazz) != null) {
return createJavaType(clazz);
} else if (clazz.isArray()) {
return createMultisetType(createType(clazz.getComponentType()), -1);
} else if (List.class.isAssignableFrom(clazz)) {
return createArrayType(createTypeWithNullability(createSqlType(SqlTypeName.ANY), true), -1);
} else if (Map.class.isAssignableFrom(clazz)) {
return createMapType(
createTypeWithNullability(createSqlType(SqlTypeName.ANY), true),
createTypeWithNullability(createSqlType(SqlTypeName.ANY), true));
} else {
return createStructType(clazz);
}
}
