This is an abstract base class for analyzers, which extract metadata from blobs. See ActiveStorage::Analyzer::ImageAnalyzer for an example of a concrete subclass.

Namespace

Class

Methods

Included Modules

Attributes

[R] blob

Class Public methods

accept?(blob)

Implement this method in a concrete subclass. Have it return true when given a blob from which the analyzer can extract metadata.

# File activestorage/lib/active_storage/analyzer.rb, line 15
def self.accept?(blob)
  false
end

new(blob)

# File activestorage/lib/active_storage/analyzer.rb, line 19
def initialize(blob)
  @blob = blob
end

Instance Public methods

metadata()

Override this method in a concrete subclass. Have it return a Hash of metadata.

# File activestorage/lib/active_storage/analyzer.rb, line 24
def metadata
  raise NotImplementedError
end

Instance Private methods

logger()

# File activestorage/lib/active_storage/analyzer.rb, line 29
def logger #:doc:
  ActiveStorage.logger
end