Class: TaliaCore::Oai::ActiveSourceOaiAdapter

Inherits:
Object
  • Object
show all
Extended by:
OaiAdapterClassMethods
Defined in:
lib/talia_core/oai/active_source_oai_adapter.rb

Overview

Wraps an ActiveSource record so that it provides the accessor methods for DublinCore. In a nutshell, this makes the object look like an ActiveRecord with “fields” like “title” or “subject”. The OAI provider can access those fields to automatically read the metatdata from the records.

Wrapping an ActiveSource

Use ActiveSourceOaiAdapter.get_wrapper_for(record) to create a new wrapper object for a given ActiveSource. Usually the ActiveSourceModel will do this automatically.

Extending the adapter

If you need more specific functionality, you may subclass the adapter or write your own adapter class that includes OaiAdapterClassMethods

In both cases you’ll get the #namespace_field class method - this will allow you to define accessors to properties in the following way:

# This maps the dcns:title and dcns:foo properties on the original 
# source to the #title and #foo accessors
namespace_field :dcns, :title, :foo

Class Method Summary collapse

Instance Method Summary collapse

Methods included from OaiAdapterClassMethods

namespaced_field

Constructor Details

#initialize(record) ⇒ ActiveSourceOaiAdapter

Returns a new instance of ActiveSourceOaiAdapter.



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 51

def initialize(record)
  assit_kind_of(ActiveSource, record)
  @record = record
end

Class Method Details

.get_wrapper_for(records) ⇒ Object

Tries to instanciate a wrapper object for the record, using the wrapper class that corresponds to the given record’s class



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 90

def self.get_wrapper_for(records)
  if(records.is_a?(ActiveSource))
    self.new(record)
  elsif(records.respond_to?(:collect))
    records.collect { |rec| self.new(rec) }
  elsif(records.nil?)
    nil
  else
    raise(ArgumentError, "Don't know how to wrap #{records.inspect}")
  end
end

Instance Method Details

#created_at ⇒ Object

Timestamp for the record



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 79

def created_at
  @record.created_at
end

#creator ⇒ Object

Get the author/creator



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 57

def creator
  @record[N::DCNS.creator].collect do |creator|
    if(creator.is_a?(TaliaCore::ActiveSource))
      author = ''
      author_name = creator.hyper::author_name.first
      author << author_name << ' ' if(author_name)
      author_surname = creator.hyper::author_surname.first || ''
      author << author_surname if(author_surname)
      author = "No lookup. Author should be at #{creator.uri}" if(author == '')
      author
    else
      creator
    end
  end
end

#id ⇒ Object

Id for the record



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 84

def id
  @record.id
end

#identifier ⇒ Object

Identifier for the resource



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 74

def identifier
  @record.uri.to_s
end

#type ⇒ Object

Type information. Base class is not terribly useful, but needed to overwrite default #type method



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# File 'lib/talia_core/oai/active_source_oai_adapter.rb', line 47

def type
  ''
end