Class: Rubydora::DigitalObject
- Inherits:
-
Object
- Object
- Rubydora::DigitalObject
- Extended by:
- ActiveModel::Callbacks, Deprecation
- Includes:
- ActiveModel::Dirty, ExtensionParameters, ModelsMixin, RelationshipsMixin
- Defined in:
- lib/rubydora/digital_object.rb
Overview
This class represents a Fedora object and provides helpers for managing attributes, datastreams, and relationships.
Using the extension framework, implementors may provide additional functionality to this base implementation.
Constant Summary collapse
- OBJ_ATTRIBUTES =
mapping object parameters to profile elements
{:state => :objState, :ownerId => :objOwnerId, :label => :objLabel, :logMessage => nil, :lastModifiedDate => :objLastModDate }
- OBJ_DEFAULT_ATTRIBUTES =
{ }
Constants included from RelationshipsMixin
Instance Attribute Summary collapse
-
#pid ⇒ Object
readonly
Returns the value of attribute pid.
Class Method Summary collapse
-
.create(pid, options = {}, repository = nil) ⇒ Object
create a new fedora object (see also DigitalObject#save).
-
.find(pid, repository = nil, options = {}) ⇒ Object
find an existing fedora object TODO: raise an error if the object does not yet exist.
-
.find_or_initialize(*args) ⇒ Object
find or initialize a Fedora object.
Instance Method Summary collapse
- #asOfDateTime(asOfDateTime = nil) ⇒ Object
- #asOfDateTime=(val) ⇒ Object
-
#datastreams ⇒ Array<Rubydora::Datastream>
(also: #datastream)
List of datastreams.
-
#delete ⇒ Rubydora::DigitalObject
Purge the object from Fedora.
-
#fetch(dsid) ⇒ Object
(also: #[])
provide an hash-like way to access datastreams.
-
#initialize(pid, repository = nil, options = {}) ⇒ DigitalObject
constructor
Initialize a Rubydora::DigitalObject, which may or may not already exist in the data store.
-
#new? ⇒ Boolean
Does this object already exist?.
-
#profile ⇒ Hash
Retrieve the object profile as a hash (and cache it).
-
#repository ⇒ Rubydora::Repository
repository reference from the digital object.
-
#save ⇒ Rubydora::DigitalObject
persist the object to Fedora, either as a new object by modifing the existing object.
-
#uri ⇒ Object
(also: #fqpid)
Return a full uri pid (for use in relations, etc.
- #versions ⇒ Object
Methods included from RelationshipsMixin
#add_relationship, included, #purge_relationship, #relationship, #relationship_changed, #relationships
Methods included from ModelsMixin
Methods included from ExtensionParameters
Constructor Details
#initialize(pid, repository = nil, options = {}) ⇒ DigitalObject
Initialize a Rubydora::DigitalObject, which may or may not already exist in the data store.
Provides ‘after_initialize` callback for extensions
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# File 'lib/rubydora/digital_object.rb', line 90 def initialize pid, repository = nil, = {} _run_initialize_callbacks do self.pid = pid @repository = repository @new = true @options = .each do |key, value| self.send(:"#{key}=", value) end end end |
Instance Attribute Details
#pid ⇒ Object
Returns the value of attribute pid.
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# File 'lib/rubydora/digital_object.rb', line 24 def pid @pid end |
Class Method Details
.create(pid, options = {}, repository = nil) ⇒ Object
create a new fedora object (see also DigitalObject#save)
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# File 'lib/rubydora/digital_object.rb', line 74 def self.create pid, = {}, repository = nil repository ||= Rubydora.repository assigned_pid = repository.ingest(.merge(:pid => pid)) self.new assigned_pid, repository end |
.find(pid, repository = nil, options = {}) ⇒ Object
find an existing fedora object TODO: raise an error if the object does not yet exist
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# File 'lib/rubydora/digital_object.rb', line 50 def self.find pid, repository = nil, = {} obj = self.new pid, repository, if obj.new? Deprecation.warn(Rubydora::DigitalObject, "DigitalObject.find called for an object that doesn't exist. In #{Rubydora::DigitalObject.deprecation_horizon}, this behavior will raise an exception. Use DigitalObject.new or DigitalObject.find_or_initialize instead.") end obj end |
.find_or_initialize(*args) ⇒ Object
find or initialize a Fedora object
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# File 'lib/rubydora/digital_object.rb', line 66 def self.find_or_initialize *args self.new *args end |
Instance Method Details
#asOfDateTime(asOfDateTime = nil) ⇒ Object
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# File 'lib/rubydora/digital_object.rb', line 118 def asOfDateTime asOfDateTime = nil if asOfDateTime == nil return @asOfDateTime end return self.class.new(pid, @repository, @options.merge(:asOfDateTime => asOfDateTime)) end |
#asOfDateTime=(val) ⇒ Object
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# File 'lib/rubydora/digital_object.rb', line 126 def asOfDateTime= val @asOfDateTime = val end |
#datastreams ⇒ Array<Rubydora::Datastream> Also known as: datastream
List of datastreams
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# File 'lib/rubydora/digital_object.rb', line 174 def datastreams @datastreams ||= begin h = Hash.new { |h,k| h[k] = datastream_object_for(k) } begin = { :pid => pid } [:asOfDateTime] = asOfDateTime if asOfDateTime datastreams_xml = repository.datastreams() datastreams_xml.gsub! '<objectDatastreams', '<objectDatastreams xmlns="http://www.fedora.info/definitions/1/0/access/"' unless datastreams_xml =~ /xmlns=/ doc = Nokogiri::XML(datastreams_xml) doc.xpath('//access:datastream', {'access' => "http://www.fedora.info/definitions/1/0/access/"}).each do |ds| h[ds['dsid']] = datastream_object_for ds['dsid'] end rescue RestClient::ResourceNotFound end h end end |
#delete ⇒ Rubydora::DigitalObject
Purge the object from Fedora
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# File 'lib/rubydora/digital_object.rb', line 226 def delete check_if_read_only my_pid = pid run_callbacks :destroy do @datastreams = nil @profile = nil @pid = nil nil end repository.purge_object(:pid => my_pid) ##This can have a meaningful exception, don't put it in the callback end |
#fetch(dsid) ⇒ Object Also known as: []
provide an hash-like way to access datastreams
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# File 'lib/rubydora/digital_object.rb', line 196 def fetch dsid datastreams[dsid] end |
#new? ⇒ Boolean
Does this object already exist?
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# File 'lib/rubydora/digital_object.rb', line 113 def new? self.profile ### Make sure we've checked the repository at least once @new end |
#profile ⇒ Hash
Retrieve the object profile as a hash (and cache it)
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# File 'lib/rubydora/digital_object.rb', line 132 def profile @profile ||= begin = { :pid => pid } [:asOfDateTime] = asOfDateTime if asOfDateTime profile_xml = repository.object() profile_xml.gsub! '<objectProfile', '<objectProfile xmlns="http://www.fedora.info/definitions/1/0/access/"' unless profile_xml =~ /xmlns=/ doc = Nokogiri::XML(profile_xml) h = doc.xpath('/access:objectProfile/*', {'access' => "http://www.fedora.info/definitions/1/0/access/"} ).inject({}) do |sum, node| sum[node.name] ||= [] sum[node.name] << node.text if node.name == "objModels" sum[node.name] = node.xpath('access:model', {'access' => "http://www.fedora.info/definitions/1/0/access/"}).map { |x| x.text } end sum end.reject { |key, values| values.empty? } h.select { |key, values| values.length == 1 }.each do |key, values| next if key == "objModels" h[key] = values.reject { |x| x.empty? }.first end @new = false h rescue RestClient::ResourceNotFound => e {} end.freeze end |
#repository ⇒ Rubydora::Repository
repository reference from the digital object
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# File 'lib/rubydora/digital_object.rb', line 240 def repository @repository ||= Rubydora.repository end |
#save ⇒ Rubydora::DigitalObject
persist the object to Fedora, either as a new object by modifing the existing object
also will save all ‘:dirty?` datastreams that already exist new datastreams must be directly saved
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# File 'lib/rubydora/digital_object.rb', line 208 def save check_if_read_only run_callbacks :save do if self.new? self.pid = repository.ingest to_api_params.merge(:pid => pid) @profile = nil #will cause a reload with updated data else p = to_api_params repository.modify_object p.merge(:pid => pid) unless p.empty? end end self.datastreams.select { |dsid, ds| ds.changed? }.each { |dsid, ds| ds.save } self end |
#uri ⇒ Object Also known as: fqpid
Return a full uri pid (for use in relations, etc
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# File 'lib/rubydora/digital_object.rb', line 105 def uri return pid if pid =~ /.+\/.+/ "info:fedora/#{pid}" end |
#versions ⇒ Object
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# File 'lib/rubydora/digital_object.rb', line 162 def versions versions_xml = repository.object_versions(:pid => pid) versions_xml.gsub! '<fedoraObjectHistory', '<fedoraObjectHistory xmlns="http://www.fedora.info/definitions/1/0/access/"' unless versions_xml =~ /xmlns=/ doc = Nokogiri::XML(versions_xml) doc.xpath('//access:objectChangeDate', {'access' => 'http://www.fedora.info/definitions/1/0/access/' } ).map do |changeDate| self.class.new pid, repository, :asOfDateTime => changeDate.text end end |