Class: KyotoCabinet::Db::PolymorphicDb

Inherits:
Object
  • Object
show all
Includes:
KyotoCabinet::Db
Defined in:
lib/kyotocabinet_ffi/db/polymorphic_db.rb

Direct Known Subclasses

FileHash, MemoryHash

Class Method Summary collapse

Instance Method Summary collapse

Methods included from KyotoCabinet::Db

#clear!, #close, #close!, #get, #last_error, #last_error_code, #last_error_message, #new, #open, #open!, #set, #set!, #size

Constructor Details

#initialize(path, options = {}) ⇒ PolymorphicDb

Returns a new instance of PolymorphicDb.



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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 9

def initialize(path, options = {})
  path_s = path.to_s
  db_options = options.delete(:db_options) || []
  unless KyotoCabinet::match_filedb_type? (path_s) or
         KyotoCabinet::match_memorydb_type? (path_s)
    msg = %Q{
      The path value \"#{path || '(nil)'}\" does not match one of the memory
      db types #{KyotoCabinet::MEMORY_DB_TYPE.map(&:to_s).join(', ')} or
      one of the file db types #{KyotoCabinet::FILE_DB_TYPE.map(&:to_s).join(', ')}.
    }.gsub(%r{^\s+}, ' ').gsub(%r{\n}, '')
    fail ArgumentError.new(msg)
  end

  self.new
  self.open!(path, *db_options)
end

Class Method Details

.tmp_filedb(type, options = {}) ⇒ Object 



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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 26

def self.tmp_filedb(type, options = {})
  prefix = options[:prefix]
  path = make_temp(type, prefix)

  self.new(path, {
    :db_options => [:create, :reader, :writer]
  })
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 35

def [](key)
  self.get(key)
end

#[]=(key, value) ⇒ Object 



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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 39

def []=(key, value)
  self.set(key, value)
end

#clear ⇒ Object 



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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 47

def clear
  super
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kyotocabinet_ffi/db/polymorphic_db.rb', line 43

def empty?
  self.size <= 0
end