Public Member Functions | Protected Attributes

CDecompressString< ST > Class Template Reference


Detailed Description

template<class ST>
class shogun::CDecompressString< ST >

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.

Inheritance diagram for CDecompressString< ST >:
Inheritance graph
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List of all members.

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

CCompressorcompressor

Constructor & Destructor Documentation

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.


Member Function Documentation

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]

cleanup

Implements CPreprocessor.

Definition at line 33 of file DecompressString.cpp.

virtual const char* get_name (  )  const [virtual]
Returns:
object name

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.


Member Data Documentation

CCompressor* compressor [protected]

compressor used to decompress strings

Definition at line 76 of file DecompressString.h.


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