Class: Fedora::FedoraObject

Inherits:
BaseObject show all
Defined in:
lib/fedora/fedora_object.rb

Instance Attribute Summary collapse

Attributes inherited from BaseObject

#attributes, #blob, #errors, #new_object

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseObject

#[], #new_object?

Constructor Details

#initialize(attrs = nil) ⇒ FedoraObject

Parameters

attrs<Hash>

fedora object attributes (see below)

Attributes (attrs)

namespace<Symbol>
pid<Symbol>
state<Symbol>
label<Symbol>
contentModel<Symbol>
objectXMLFormat<Symbol>
ownerID<Symbol>

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# File 'lib/fedora/fedora_object.rb', line 20

def initialize(attrs = nil)
  super
  # TODO: check for required attributes
end

Instance Attribute Details

#target_repository ⇒ Object

Returns the value of attribute target_repository.



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# File 'lib/fedora/fedora_object.rb', line 6

def target_repository
  @target_repository
end

Class Method Details

.object_xml(pid = pid) ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 142

def self.object_xml(pid=pid)
  Fedora::Repository.instance.fetch_custom(pid, :objectXML)
end

Instance Method Details

#create_date ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 52

def create_date
  if attributes[:create_date] 
    return attributes[:create_date]
  elsif !new_object?
      properties_from_fedora[:create_date]
  else 
    return nil
  end
end

#label ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 99

def label
  if attributes[:label] 
    return attributes[:label]
  elsif !new_object?
      properties_from_fedora[:label]
  else 
    return nil
  end
end

#label=(new_label) ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 109

def label=(new_label)
  self.attributes[:label] = new_label
end

#load_attributes_from_fedora ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 30

def load_attributes_from_fedora
  #self.attributes.merge!(profile)
  attributes.merge!(properties_from_fedora)
end

#modified_date ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 62

def modified_date
  if attributes[:modified_date] 
    return attributes[:modified_date]
  elsif !new_object?
      properties_from_fedora[:modified_date]
  else 
    return nil
  end
end

#object_xml ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 138

def object_xml
  Fedora::Repository.instance.fetch_custom(pid, :objectXML)
end

#owner_id ⇒ Object

Get the object and read its @ownerId from the profile



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# File 'lib/fedora/fedora_object.rb', line 114

def owner_id
  if attributes[:owner_id] 
    return attributes[:owner_id]
  elsif !new_object?
      properties_from_fedora[:owner_id]
  else 
    return nil
  end
end

#owner_id=(new_owner_id) ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 124

def owner_id=(new_owner_id)
  self.attributes.merge!({:ownerID => new_owner_id})
end

#pid ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 73

def pid
  self.attributes[:pid]
end

#pid=(new_pid) ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 77

def pid=(new_pid)
  self.attributes.merge!({:pid => new_pid})
end

#profile ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 128

def profile
  # Use xmlsimple to slurp the attributes
  retrieved_profile = XmlSimple.xml_in(Fedora::Repository.instance.fetch_custom(self.pid, :profile))
  profile_hash = Hash[:owner_id => retrieved_profile["objOwnerId"],
                        :label => retrieved_profile["objLabel"],
                        :create_date =>  retrieved_profile["objCreateDate"],
                        :modified_date => retrieved_profile["objLastModDate"]
                      ]                           
end

#properties_from_fedora ⇒ Object

Reads all object properties from the object’s FOXML into a hash. Provides slightly more info than .profile, including the object state.



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# File 'lib/fedora/fedora_object.rb', line 36

def properties_from_fedora
  object_rexml = REXML::Document.new(object_xml)
  properties = {
       :pid => object_rexml.root.attributes["PID"],
       :state => object_rexml.root.elements["//foxml:property[@NAME='info:fedora/fedora-system:def/model#state']"].attributes["VALUE"],
       :create_date => object_rexml.root.elements["//foxml:property[@NAME='info:fedora/fedora-system:def/model#createdDate']"].attributes["VALUE"],
       :modified_date => object_rexml.root.elements["//foxml:property[@NAME='info:fedora/fedora-system:def/view#lastModifiedDate']"].attributes["VALUE"],
       :owner_id => object_rexml.root.elements['//foxml:property[@NAME="info:fedora/fedora-system:def/model#ownerId"]'].attributes['VALUE']
  }
  label_element = object_rexml.root.elements["//foxml:property[@NAME='info:fedora/fedora-system:def/model#label']"]
  if label_element
   properties.merge!({:label => label_element.attributes["VALUE"]})
  end
  return properties
end

#state ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 81

def state
  if attributes[:state] 
    return attributes[:state]
  elsif !new_object?
      properties_from_fedora[:state]
  else 
    return nil
  end
end

#state=(new_state) ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 91

def state=(new_state)
  if ["I", "A", "D"].include? new_state
    self.attributes[:state]  = new_state
  else
    raise 'The object state of "' + new_state + '" is invalid. The allowed values for state are:  A (active), D (deleted), and I (inactive).'
  end
end

#uri ⇒ Object

See www.fedora.info/definitions/identifiers



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# File 'lib/fedora/fedora_object.rb', line 147

def uri
  "fedora:info/#{pid}"
end

#url ⇒ Object 



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# File 'lib/fedora/fedora_object.rb', line 152

def url
  repo_url = Fedora::Repository.instance.fedora_url
  return "#{repo_url.scheme}://#{repo_url.host}:#{repo_url.port}#{repo_url.path}/objects/#{pid}"
end