The class Alphabet implements an alphabet and alphabet utility functions.
These utility functions can be used to remap characters to more (bit-)efficient representations, check if a string is valid, compute histograms etc.
Currently supported alphabets are DNA, RAWDNA, RNA, PROTEIN, BINARY, ALPHANUM, CUBE, RAW, IUPAC_NUCLEIC_ACID and IUPAC_AMINO_ACID.
Definition at line 88 of file Alphabet.h.
Public Member Functions | |
CAlphabet () | |
CAlphabet (char *alpha, int32_t len) | |
CAlphabet (EAlphabet alpha) | |
CAlphabet (CAlphabet *alpha) | |
virtual | ~CAlphabet () |
bool | set_alphabet (EAlphabet alpha) |
EAlphabet | get_alphabet () const |
int32_t | get_num_symbols () const |
int32_t | get_num_bits () const |
uint8_t | remap_to_bin (uint8_t c) |
uint8_t | remap_to_char (uint8_t c) |
void | clear_histogram () |
clear histogram | |
template<class T > | |
void | add_string_to_histogram (T *p, int64_t len) |
void | add_byte_to_histogram (uint8_t p) |
void | print_histogram () |
print histogram | |
SGVector< int64_t > | get_histogram () |
bool | check_alphabet (bool print_error=true) |
bool | is_valid (uint8_t c) |
bool | check_alphabet_size (bool print_error=true) |
int32_t | get_num_symbols_in_histogram () |
int32_t | get_max_value_in_histogram () |
int32_t | get_num_bits_in_histogram () |
virtual const char * | get_name () const |
template<> | |
void | translate_from_single_order (float32_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<> | |
void | translate_from_single_order (float64_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<> | |
void | translate_from_single_order (floatmax_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<> | |
void | translate_from_single_order_reversed (float32_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<> | |
void | translate_from_single_order_reversed (float64_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<> | |
void | translate_from_single_order_reversed (floatmax_t *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
virtual CSGObject * | shallow_copy () const |
virtual CSGObject * | deep_copy () const |
virtual bool | is_generic (EPrimitiveType *generic) const |
template<class T > | |
void | set_generic () |
void | unset_generic () |
virtual void | print_serializable (const char *prefix="") |
virtual bool | save_serializable (CSerializableFile *file, const char *prefix="", int32_t param_version=VERSION_PARAMETER) |
virtual bool | load_serializable (CSerializableFile *file, const char *prefix="", int32_t param_version=VERSION_PARAMETER) |
DynArray< TParameter * > * | load_file_parameters (const SGParamInfo *param_info, int32_t file_version, CSerializableFile *file, const char *prefix="") |
DynArray< TParameter * > * | load_all_file_parameters (int32_t file_version, int32_t current_version, CSerializableFile *file, const char *prefix="") |
void | map_parameters (DynArray< TParameter * > *param_base, int32_t &base_version, DynArray< const SGParamInfo * > *target_param_infos) |
void | set_global_io (SGIO *io) |
SGIO * | get_global_io () |
void | set_global_parallel (Parallel *parallel) |
Parallel * | get_global_parallel () |
void | set_global_version (Version *version) |
Version * | get_global_version () |
SGStringList< char > | get_modelsel_names () |
void | print_modsel_params () |
char * | get_modsel_param_descr (const char *param_name) |
index_t | get_modsel_param_index (const char *param_name) |
void | build_parameter_dictionary (CMap< TParameter *, CSGObject * > &dict) |
Static Public Member Functions | |
static const char * | get_alphabet_name (EAlphabet alphabet) |
template<class ST > | |
static void | translate_from_single_order (ST *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val) |
template<class ST > | |
static void | translate_from_single_order_reversed (ST *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val) |
template<class ST > | |
static void | translate_from_single_order (ST *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
template<class ST > | |
static void | translate_from_single_order_reversed (ST *obs, int32_t sequence_length, int32_t start, int32_t p_order, int32_t max_val, int32_t gap) |
Public Attributes | |
SGIO * | io |
Parallel * | parallel |
Version * | version |
Parameter * | m_parameters |
Parameter * | m_model_selection_parameters |
ParameterMap * | m_parameter_map |
uint32_t | m_hash |
Static Public Attributes | |
static const uint8_t | B_A = 0 |
static const uint8_t | B_C = 1 |
static const uint8_t | B_G = 2 |
static const uint8_t | B_T = 3 |
static const uint8_t | B_0 = 4 |
static const uint8_t | MAPTABLE_UNDEF = 0xff |
static const char * | alphabet_names [18] |
Protected Member Functions | |
void | init_map_table () |
void | copy_histogram (CAlphabet *src) |
virtual void | load_serializable_post () throw (ShogunException) |
virtual TParameter * | migrate (DynArray< TParameter * > *param_base, const SGParamInfo *target) |
virtual void | one_to_one_migration_prepare (DynArray< TParameter * > *param_base, const SGParamInfo *target, TParameter *&replacement, TParameter *&to_migrate, char *old_name=NULL) |
virtual void | load_serializable_pre () throw (ShogunException) |
virtual void | save_serializable_pre () throw (ShogunException) |
virtual void | save_serializable_post () throw (ShogunException) |
virtual bool | update_parameter_hash () |
Protected Attributes | |
EAlphabet | alphabet |
int32_t | num_symbols |
int32_t | num_bits |
bool | valid_chars [1<< (sizeof(uint8_t)*8)] |
uint8_t | maptable_to_bin [1<< (sizeof(uint8_t)*8)] |
uint8_t | maptable_to_char [1<< (sizeof(uint8_t)*8)] |
int64_t | histogram [1<< (sizeof(uint8_t)*8)] |
CAlphabet | ( | ) |
default constructor
Definition at line 34 of file Alphabet.cpp.
CAlphabet | ( | char * | alpha, | |
int32_t | len | |||
) |
~CAlphabet | ( | ) | [virtual] |
Definition at line 103 of file Alphabet.cpp.
void add_byte_to_histogram | ( | uint8_t | p | ) |
void add_string_to_histogram | ( | T * | p, | |
int64_t | len | |||
) |
make histogram for whole string
p | string | |
len | length of string |
Definition at line 180 of file Alphabet.h.
void build_parameter_dictionary | ( | CMap< TParameter *, CSGObject * > & | dict | ) | [inherited] |
Builds a dictionary of all parameters in SGObject as well of those of SGObjects that are parameters of this object. Dictionary maps parameters to the objects that own them.
dict | dictionary of parameters to be built. |
Definition at line 1201 of file SGObject.cpp.
bool check_alphabet | ( | bool | print_error = true |
) |
check whether symbols in histogram are valid in alphabet e.g. for DNA if only letters ACGT appear
print_error | if errors shall be printed |
Definition at line 600 of file Alphabet.cpp.
bool check_alphabet_size | ( | bool | print_error = true |
) |
check whether symbols in histogram ALL fit in alphabet
print_error | if errors shall be printed |
Definition at line 622 of file Alphabet.cpp.
void clear_histogram | ( | ) |
clear histogram
Definition at line 543 of file Alphabet.cpp.
void copy_histogram | ( | CAlphabet * | src | ) | [protected] |
copy histogram
src | alphabet to copy histogram from |
Definition at line 639 of file Alphabet.cpp.
virtual CSGObject* deep_copy | ( | ) | const [virtual, inherited] |
A deep copy. All the instance variables will also be copied.
Definition at line 131 of file SGObject.h.
EAlphabet get_alphabet | ( | ) | const |
const char * get_alphabet_name | ( | EAlphabet | alphabet | ) | [static] |
return alphabet name
alphabet | alphabet type to get name from |
Definition at line 652 of file Alphabet.cpp.
SGIO * get_global_io | ( | ) | [inherited] |
Parallel * get_global_parallel | ( | ) | [inherited] |
Version * get_global_version | ( | ) | [inherited] |
SGVector< int64_t > get_histogram | ( | ) |
int32_t get_max_value_in_histogram | ( | ) |
return maximum value in histogram
Definition at line 549 of file Alphabet.cpp.
SGStringList< char > get_modelsel_names | ( | ) | [inherited] |
Definition at line 1108 of file SGObject.cpp.
char * get_modsel_param_descr | ( | const char * | param_name | ) | [inherited] |
Returns description of a given parameter string, if it exists. SG_ERROR otherwise
param_name | name of the parameter |
Definition at line 1132 of file SGObject.cpp.
index_t get_modsel_param_index | ( | const char * | param_name | ) | [inherited] |
Returns index of model selection parameter with provided index
param_name | name of model selection parameter |
Definition at line 1145 of file SGObject.cpp.
virtual const char* get_name | ( | ) | const [virtual] |
int32_t get_num_bits | ( | ) | const |
get number of bits necessary to store all symbols in alphabet
Definition at line 146 of file Alphabet.h.
int32_t get_num_bits_in_histogram | ( | ) |
return number of bits required to store all symbols in histogram
Definition at line 576 of file Alphabet.cpp.
int32_t get_num_symbols | ( | ) | const |
get number of symbols in alphabet
Definition at line 136 of file Alphabet.h.
int32_t get_num_symbols_in_histogram | ( | ) |
return number of symbols in histogram
Definition at line 564 of file Alphabet.cpp.
void init_map_table | ( | ) | [protected] |
init map table
Definition at line 178 of file Alphabet.cpp.
bool is_generic | ( | EPrimitiveType * | generic | ) | const [virtual, inherited] |
If the SGSerializable is a class template then TRUE will be returned and GENERIC is set to the type of the generic.
generic | set to the type of the generic if returning TRUE |
Definition at line 278 of file SGObject.cpp.
bool is_valid | ( | uint8_t | c | ) |
check whether symbols are valid in alphabet e.g. for DNA if symbol is one of the A,C,G or T
c | symbol |
Definition at line 218 of file Alphabet.h.
DynArray< TParameter * > * load_all_file_parameters | ( | int32_t | file_version, | |
int32_t | current_version, | |||
CSerializableFile * | file, | |||
const char * | prefix = "" | |||
) | [inherited] |
maps all parameters of this instance to the provided file version and loads all parameter data from the file into an array, which is sorted (basically calls load_file_parameter(...) for all parameters and puts all results into a sorted array)
file_version | parameter version of the file | |
current_version | version from which mapping begins (you want to use VERSION_PARAMETER for this in most cases) | |
file | file to load from | |
prefix | prefix for members |
Definition at line 679 of file SGObject.cpp.
DynArray< TParameter * > * load_file_parameters | ( | const SGParamInfo * | param_info, | |
int32_t | file_version, | |||
CSerializableFile * | file, | |||
const char * | prefix = "" | |||
) | [inherited] |
loads some specified parameters from a file with a specified version The provided parameter info has a version which is recursively mapped until the file parameter version is reached. Note that there may be possibly multiple parameters in the mapping, therefore, a set of TParameter instances is returned
param_info | information of parameter | |
file_version | parameter version of the file, must be <= provided parameter version | |
file | file to load from | |
prefix | prefix for members |
Definition at line 523 of file SGObject.cpp.
bool load_serializable | ( | CSerializableFile * | file, | |
const char * | prefix = "" , |
|||
int32_t | param_version = VERSION_PARAMETER | |||
) | [virtual, inherited] |
Load this object from file. If it will fail (returning FALSE) then this object will contain inconsistent data and should not be used!
file | where to load from | |
prefix | prefix for members | |
param_version | (optional) a parameter version different to (this is mainly for testing, better do not use) |
Reimplemented in CModelSelectionParameters.
Definition at line 354 of file SGObject.cpp.
void load_serializable_post | ( | ) | throw (ShogunException) [protected, virtual] |
Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_POST is called.
ShogunException | Will be thrown if an error occurres. |
Reimplemented from CSGObject.
Definition at line 732 of file Alphabet.cpp.
void load_serializable_pre | ( | ) | throw (ShogunException) [protected, virtual, inherited] |
Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_PRE is called.
ShogunException | Will be thrown if an error occurres. |
Definition at line 1028 of file SGObject.cpp.
void map_parameters | ( | DynArray< TParameter * > * | param_base, | |
int32_t & | base_version, | |||
DynArray< const SGParamInfo * > * | target_param_infos | |||
) | [inherited] |
Takes a set of TParameter instances (base) with a certain version and a set of target parameter infos and recursively maps the base level wise to the current version using CSGObject::migrate(...). The base is replaced. After this call, the base version containing parameters should be of same version/type as the initial target parameter infos. Note for this to work, the migrate methods and all the internal parameter mappings have to match
param_base | set of TParameter instances that are mapped to the provided target parameter infos | |
base_version | version of the parameter base | |
target_param_infos | set of SGParamInfo instances that specify the target parameter base |
Definition at line 717 of file SGObject.cpp.
TParameter * migrate | ( | DynArray< TParameter * > * | param_base, | |
const SGParamInfo * | target | |||
) | [protected, virtual, inherited] |
creates a new TParameter instance, which contains migrated data from the version that is provided. The provided parameter data base is used for migration, this base is a collection of all parameter data of the previous version. Migration is done FROM the data in param_base TO the provided param info Migration is always one version step. Method has to be implemented in subclasses, if no match is found, base method has to be called.
If there is an element in the param_base which equals the target, a copy of the element is returned. This represents the case when nothing has changed and therefore, the migrate method is not overloaded in a subclass
param_base | set of TParameter instances to use for migration | |
target | parameter info for the resulting TParameter |
Definition at line 923 of file SGObject.cpp.
void one_to_one_migration_prepare | ( | DynArray< TParameter * > * | param_base, | |
const SGParamInfo * | target, | |||
TParameter *& | replacement, | |||
TParameter *& | to_migrate, | |||
char * | old_name = NULL | |||
) | [protected, virtual, inherited] |
This method prepares everything for a one-to-one parameter migration. One to one here means that only ONE element of the parameter base is needed for the migration (the one with the same name as the target). Data is allocated for the target (in the type as provided in the target SGParamInfo), and a corresponding new TParameter instance is written to replacement. The to_migrate pointer points to the single needed TParameter instance needed for migration. If a name change happened, the old name may be specified by old_name. In addition, the m_delete_data flag of to_migrate is set to true. So if you want to migrate data, the only thing to do after this call is converting the data in the m_parameter fields. If unsure how to use - have a look into an example for this. (base_migration_type_conversion.cpp for example)
param_base | set of TParameter instances to use for migration | |
target | parameter info for the resulting TParameter | |
replacement | (used as output) here the TParameter instance which is returned by migration is created into | |
to_migrate | the only source that is used for migration | |
old_name | with this parameter, a name change may be specified |
Definition at line 864 of file SGObject.cpp.
void print_histogram | ( | ) |
print histogram
Definition at line 586 of file Alphabet.cpp.
void print_modsel_params | ( | ) | [inherited] |
prints all parameter registered for model selection and their type
Definition at line 1084 of file SGObject.cpp.
void print_serializable | ( | const char * | prefix = "" |
) | [virtual, inherited] |
prints registered parameters out
prefix | prefix for members |
Definition at line 290 of file SGObject.cpp.
uint8_t remap_to_bin | ( | uint8_t | c | ) |
remap element e.g translate ACGT to 0123
c | element to remap |
Definition at line 156 of file Alphabet.h.
uint8_t remap_to_char | ( | uint8_t | c | ) |
remap element e.g translate 0123 to ACGT
c | element to remap |
Definition at line 166 of file Alphabet.h.
bool save_serializable | ( | CSerializableFile * | file, | |
const char * | prefix = "" , |
|||
int32_t | param_version = VERSION_PARAMETER | |||
) | [virtual, inherited] |
Save this object to file.
file | where to save the object; will be closed during returning if PREFIX is an empty string. | |
prefix | prefix for members | |
param_version | (optional) a parameter version different to (this is mainly for testing, better do not use) |
Reimplemented in CModelSelectionParameters.
Definition at line 296 of file SGObject.cpp.
void save_serializable_post | ( | ) | throw (ShogunException) [protected, virtual, inherited] |
Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_POST is called.
ShogunException | Will be thrown if an error occurres. |
Reimplemented in CKernel.
Definition at line 1043 of file SGObject.cpp.
void save_serializable_pre | ( | ) | throw (ShogunException) [protected, virtual, inherited] |
Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_PRE is called.
ShogunException | Will be thrown if an error occurres. |
Reimplemented in CKernel.
Definition at line 1038 of file SGObject.cpp.
bool set_alphabet | ( | EAlphabet | alpha | ) |
set alphabet and initialize mapping table (for remap)
alpha | new alphabet |
Definition at line 107 of file Alphabet.cpp.
void set_generic< floatmax_t > | ( | ) | [inherited] |
set generic type to T
void set_global_io | ( | SGIO * | io | ) | [inherited] |
void set_global_parallel | ( | Parallel * | parallel | ) | [inherited] |
set the parallel object
parallel | parallel object to use |
Definition at line 230 of file SGObject.cpp.
void set_global_version | ( | Version * | version | ) | [inherited] |
set the version object
version | version object to use |
Definition at line 265 of file SGObject.cpp.
virtual CSGObject* shallow_copy | ( | ) | const [virtual, inherited] |
A shallow copy. All the SGObject instance variables will be simply assigned and SG_REF-ed.
Reimplemented in CGaussianKernel.
Definition at line 122 of file SGObject.h.
void translate_from_single_order | ( | ST * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val | |||
) | [static] |
translate from single order
obs | observation | |
sequence_length | length of sequence | |
start | start | |
p_order | order | |
max_val | maximum value |
Definition at line 743 of file Alphabet.cpp.
void translate_from_single_order | ( | float32_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 938 of file Alphabet.cpp.
void translate_from_single_order | ( | floatmax_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 946 of file Alphabet.cpp.
void translate_from_single_order | ( | float64_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 942 of file Alphabet.cpp.
void translate_from_single_order | ( | ST * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) | [static] |
translate from single order
obs | observation | |
sequence_length | length of sequence | |
start | start | |
p_order | order | |
max_val | maximum value | |
gap | gap |
Definition at line 819 of file Alphabet.cpp.
template void translate_from_single_order_reversed< float32_t > | ( | float32_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 950 of file Alphabet.cpp.
void translate_from_single_order_reversed | ( | ST * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) | [static] |
translate from single order reversed
obs | observation | |
sequence_length | length of sequence | |
start | start | |
p_order | order | |
max_val | maximum value | |
gap | gap |
Definition at line 881 of file Alphabet.cpp.
template void translate_from_single_order_reversed< floatmax_t > | ( | floatmax_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 958 of file Alphabet.cpp.
template void translate_from_single_order_reversed< float64_t > | ( | float64_t * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val, | |||
int32_t | gap | |||
) |
Definition at line 954 of file Alphabet.cpp.
void translate_from_single_order_reversed | ( | ST * | obs, | |
int32_t | sequence_length, | |||
int32_t | start, | |||
int32_t | p_order, | |||
int32_t | max_val | |||
) | [static] |
translate from single order reversed
obs | observation | |
sequence_length | length of sequence | |
start | start | |
p_order | order | |
max_val | maximum value |
Definition at line 781 of file Alphabet.cpp.
void unset_generic | ( | ) | [inherited] |
unset generic type
this has to be called in classes specializing a template class
Definition at line 285 of file SGObject.cpp.
bool update_parameter_hash | ( | ) | [protected, virtual, inherited] |
Updates the hash of current parameter combination.
Definition at line 237 of file SGObject.cpp.
alphabet
Definition at line 350 of file Alphabet.h.
const char * alphabet_names [static] |
{ "DNA","RAWDNA", "RNA", "PROTEIN", "BINARY", "ALPHANUM", "CUBE", "RAW", "IUPAC_NUCLEIC_ACID", "IUPAC_AMINO_ACID", "NONE", "DIGIT", "DIGIT2", "RAWDIGIT", "RAWDIGIT2", "UNKNOWN", "SNP", "RAWSNP"}
alphabet names
Definition at line 335 of file Alphabet.h.
const uint8_t B_0 = 4 [static] |
B_0
Definition at line 331 of file Alphabet.h.
const uint8_t B_A = 0 [static] |
B_A
Definition at line 323 of file Alphabet.h.
const uint8_t B_C = 1 [static] |
B_C
Definition at line 325 of file Alphabet.h.
const uint8_t B_G = 2 [static] |
B_G
Definition at line 327 of file Alphabet.h.
const uint8_t B_T = 3 [static] |
B_T
Definition at line 329 of file Alphabet.h.
int64_t histogram[1<< (sizeof(uint8_t)*8)] [protected] |
histogram
Definition at line 362 of file Alphabet.h.
io
Definition at line 462 of file SGObject.h.
uint32_t m_hash [inherited] |
Hash of parameter values
Definition at line 480 of file SGObject.h.
Parameter* m_model_selection_parameters [inherited] |
model selection parameters
Definition at line 474 of file SGObject.h.
ParameterMap* m_parameter_map [inherited] |
map for different parameter versions
Definition at line 477 of file SGObject.h.
Parameter* m_parameters [inherited] |
parameters
Definition at line 471 of file SGObject.h.
uint8_t maptable_to_bin[1<< (sizeof(uint8_t)*8)] [protected] |
maptable to bin
Definition at line 358 of file Alphabet.h.
uint8_t maptable_to_char[1<< (sizeof(uint8_t)*8)] [protected] |
maptable to char
Definition at line 360 of file Alphabet.h.
const uint8_t MAPTABLE_UNDEF = 0xff [static] |
MAPTABLE UNDEF
Definition at line 333 of file Alphabet.h.
int32_t num_bits [protected] |
number of bits
Definition at line 354 of file Alphabet.h.
int32_t num_symbols [protected] |
number of symbols
Definition at line 352 of file Alphabet.h.
parallel
Definition at line 465 of file SGObject.h.
bool valid_chars[1<< (sizeof(uint8_t)*8)] [protected] |
valid chars
Definition at line 356 of file Alphabet.h.
version
Definition at line 468 of file SGObject.h.