Module: Persistence::Object::ParsePersistenceArgs::ClassInstance

Includes:
Persistence::Object::ParsePersistenceArgs
Included in:
ClassInstance
Defined in:
lib/persistence/object/parse_persistence_args/class_instance.rb

Overview

Class-specific implementation for parsing persistence args.

Internal helper for parsing args of the format: method, method( global_id ), method( index_name, value ),

method( index_instance, value ), method( index_name => value ), method( index_instance => value ).

Instance Method Summary collapse

Methods included from Persistence::Object::ParsePersistenceArgs

#process_file_key

Instance Method Details

#parse_class_args_for_index_value_no_value(args, require_value = false) ⇒ Array

Parse *args for index, key_value, no_value.

Parameters:

  • args (Array) —

    An array of args of the format: method, method( global_id ), method( index_name, value ), method( index_instance, value ), method( index_name => value ), method( index_instance => value ).

  • require_value (true, false) (defaults to: false) —

    Whether key value must be provided; will throw exception if true and key value is not provided.

Returns:

  • (Array) —

    Array containing index instance, key value, whether key value was provided.



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# File 'lib/persistence/object/parse_persistence_args/class_instance.rb', line 29

def parse_class_args_for_index_value_no_value( args, require_value = false )
  
  # * nil
  #   - Cursor to primary bucket
  # * :index
  #   - Cursor to index
  # * :index => persistence_key
  #   - Object(s) for indexed key value
  
  index = nil
  key_value = nil
  no_value = nil
  case args.count

    when 0

      no_value = true
      if require_value
        raise ::Persistence::Exception::KeyValueRequired, 
              'Key value required.'
      end

    when 1

      index_or_id = args[ 0 ]

      case index_or_id

        when ::Symbol, ::String

          index = index( index_or_id, true )
          no_value = true

        when ::Hash

          key_value = index_or_id.values[ 0 ]
          index_name = index_or_id.keys[ 0 ]

          case index_name

            when ::Symbol, ::String

              index = index( index_name, true )

          end

          no_value = false
        
        else

          if index_or_id.respond_to?( :index_object )

            index = index_or_id
            no_value = true
          
          else

            # persistence_id - anything other than Symbol, String, Hash
            key_value = args[ 0 ]
            no_value = false

          end
        
      end
      
    when 2

      index_or_name = args[ 0 ]

      
      if index_or_name.respond_to?( :index_object )
        index = index_or_name
      elsif index_or_name
        index = index( index_or_name, true )
      end
      
      key_value = args[ 1 ]

      no_value = false

    else

      raise 'Unexpected arguments ' << args.inspect + '.'

  end
  
  # if we have a file we need to persist it like we would a sub-object
  if key_value.is_a?( ::File )
    key_value = process_file_key( key_value )
  end
  
  return index, key_value, no_value
  
end