Preprocessor that decompresses compressed strings.
Each string in CStringFeatures might be stored compressed in memory. This preprocessor decompresses these strings on the fly. This may be especially usefull for long strings and when datasets become too large to fit in memoryin uncompressed form but still when they are compressed.
Then avoiding expensive disk i/o strings are on-the-fly decompressed.
Definition at line 35 of file DecompressString.h.
Public Member Functions | |
CDecompressString () | |
CDecompressString (E_COMPRESSION_TYPE ct) | |
virtual | ~CDecompressString () |
virtual bool | init (CFeatures *f) |
initialize preprocessor from features | |
virtual void | cleanup () |
cleanup | |
bool | load (FILE *f) |
initialize preprocessor from file | |
bool | save (FILE *f) |
save preprocessor init-data to file | |
virtual bool | apply_to_string_features (CFeatures *f) |
virtual ST * | apply_to_string (ST *f, int32_t &len) |
apply preproc on single feature vector | |
virtual const char * | get_name () const |
virtual EPreprocessorType | get_type () const |
return a type of preprocessor TODO: template specification of get_type | |
Protected Attributes | |
CCompressor * | compressor |
default constructor
Definition at line 8 of file DecompressString.cpp.
constructor
Definition at line 14 of file DecompressString.cpp.
~CDecompressString | ( | ) | [virtual] |
destructor
Definition at line 20 of file DecompressString.cpp.
ST * apply_to_string | ( | ST * | f, | |
int32_t & | len | |||
) | [virtual] |
apply preproc on single feature vector
Implements CStringPreprocessor< ST >.
Definition at line 78 of file DecompressString.cpp.
bool apply_to_string_features | ( | CFeatures * | f | ) | [virtual] |
apply preproc on feature matrix result in feature matrix return pointer to feature_matrix, i.e. f->get_feature_matrix();
Implements CStringPreprocessor< ST >.
Definition at line 54 of file DecompressString.cpp.
void cleanup | ( | ) | [virtual] |
virtual const char* get_name | ( | ) | const [virtual] |
Reimplemented from CStringPreprocessor< ST >.
Definition at line 69 of file DecompressString.h.
EPreprocessorType get_type | ( | ) | const [virtual] |
return a type of preprocessor TODO: template specification of get_type
Reimplemented from CStringPreprocessor< ST >.
Definition at line 97 of file DecompressString.cpp.
bool init | ( | CFeatures * | f | ) | [virtual] |
initialize preprocessor from features
Implements CPreprocessor.
Definition at line 26 of file DecompressString.cpp.
bool load | ( | FILE * | f | ) |
initialize preprocessor from file
Definition at line 38 of file DecompressString.cpp.
bool save | ( | FILE * | f | ) |
save preprocessor init-data to file
Definition at line 46 of file DecompressString.cpp.
CCompressor* compressor [protected] |
compressor used to decompress strings
Definition at line 76 of file DecompressString.h.