Inheritance diagram for simstring::writer_base< string_tmpl, ngram_generator_tmpl >:
This template class builds a SimString database. The first template argument (string_tmpl) specifies the type of a character, and the second template argument (ngram_generator_tmpl) customizes generation of feature sets (n-grams) from strings.
Inheriting the base class ngramdb_writer_base that builds indices from n-grams to string IDs, this class maintains associations between strings and string IDs.
| string_tmpl | The type of a string. | |
| ngram_generator_tmpl | The type of an n-gram generator. |
Public Types | |
| typedef string_tmpl | string_type |
| The type representing a string. | |
| typedef uint32_t | value_type |
| The type of values associated with key strings. | |
| typedef ngram_generator_tmpl | ngram_generator_type |
| The function type for generating n-grams from a key string. | |
| typedef string_type::value_type | char_type |
| The type representing a character. | |
Public Member Functions | |
| writer_base (const ngram_generator_type &gen) | |
| Constructs a writer object. | |
| writer_base (const ngram_generator_type &gen, const std::string &name) | |
| Constructs a writer object by opening a database. | |
| virtual | ~writer_base () |
| Destructs a writer object. | |
| bool | open (const std::string &name) |
| Opens a database. | |
| bool | close () |
| Closes the database. | |
| bool | insert (const string_type &str) |
| Inserts a string to the database. | |
Protected Attributes | |
| std::string | m_name |
| The base name of the database. | |
| std::ofstream | m_ofs |
| The output stream for the string collection. | |
| int | m_num_entries |
| The number of strings in the database. | |
| simstring::writer_base< string_tmpl, ngram_generator_tmpl >::writer_base | ( | const ngram_generator_type & | gen | ) | [inline] |
Constructs a writer object.
| gen | The n-gram generator used by this writer. |
| simstring::writer_base< string_tmpl, ngram_generator_tmpl >::writer_base | ( | const ngram_generator_type & | gen, | |
| const std::string & | name | |||
| ) | [inline] |
Constructs a writer object by opening a database.
| gen | The n-gram generator used by this writer. | |
| name | The name of the database. |
| bool simstring::writer_base< string_tmpl, ngram_generator_tmpl >::open | ( | const std::string & | name | ) | [inline] |
Opens a database.
| name | The name of the database. |
true if the database is successfully opened, false otherwise. | bool simstring::writer_base< string_tmpl, ngram_generator_tmpl >::close | ( | ) | [inline] |
Closes the database.
| name | The name of the database. |
true if the database is successfully opened, false otherwise. | bool simstring::writer_base< string_tmpl, ngram_generator_tmpl >::insert | ( | const string_type & | str | ) | [inline] |
Inserts a string to the database.
| str | The string to be inserted. |
true if the string is successfully inserted, false otherwise.