Class: OWL::Class

Inherits:
RDFS::Resource show all
Defined in:
lib/objectmanager/owl/class.rb

Overview

Resembles a class in OWL context.

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from RDFS::Resource

#ancestors, #geopoint, #gmarker, #is_class?, #is_image?, #is_property?, #latitude, #localname, #longitude, #parents, #properties, #range, #resources_for_property, #stripped_uri, #types

Constructor Details

#initialize(resource, options = {}) ⇒ Class

Creates a new OWL::Class.

parameters:

1  resource ( RDFS::Resource or URI )
2  options ( Hash; )



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# File 'lib/objectmanager/owl/class.rb', line 22

def initialize( resource, options={} )
  @@log.deep "Formulating new OWL::Class #{resource} from #{resource.class}"
  @uri = case resource
  when OWL::Class
    @@log.warn "Redundant new OWL::Class, resource already was one."
    resource.uri
  when RDFS::Resource
    resource.uri
  when String
    resource
  else
    raise ActiveRdfError, "Resource #{resource} (#{resource.class}) is improperly formulated"
    return nil
  end

#       @data_stores = options[ :from ] || RUBIC_DATASTORES
#       @predicates = Hash.new
end

Class Attribute Details

.class_uri ⇒ Object

Returns the value of attribute class_uri.



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# File 'lib/objectmanager/owl/class.rb', line 11

def class_uri
  @class_uri
end

Instance Attribute Details

#uri ⇒ Object (readonly)

uri of the resource (for instances of this class: rdf resources)



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# File 'lib/objectmanager/owl/class.rb', line 15

def uri
  @uri
end

Class Method Details

.==(other) ⇒ Object 



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# File 'lib/objectmanager/owl/class.rb', line 47

def self.==(other)
  other.respond_to?(:uri) ? other.uri == self.uri : false
end

.uri ⇒ Object 



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# File 'lib/objectmanager/owl/class.rb', line 46

def self.uri; class_uri.uri; end

Instance Method Details

#children ⇒ Object

find the child classes



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# File 'lib/objectmanager/owl/class.rb', line 61

def children
  begin
    # the class variable is set if this query has been executed already
    if @children.nil? then
      @children = ActiveRubic::Base.find( :children, :class => self )
    end
    return @children
  rescue
    return Array.new
  end
end

#descendants ⇒ Object

find the descendant classes



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# File 'lib/objectmanager/owl/class.rb', line 74

def descendants
  begin
    # the class variable is set if this query has been executed already
    if @descendants.nil? then
      @descendants = ActiveRubic::Base.find( :descendants, :class => self )
    end
    return @descendants
  rescue
    return Array.new
  end
end

#instances ⇒ Object 



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# File 'lib/objectmanager/owl/class.rb', line 86

def instances
  begin
    # the class variable is set if this query has been executed already
    if @instances.nil? then
      @instances = ActiveRubic::Base.find( :instances_of, :class => self )
    end
    return @instances
  rescue
    return Array.new
  end
end

#is_mappable? ⇒ Boolean Also known as: has_markers?, has_coordinates?

Examines all instances of this class, breaks when first mappable resource is found, and returns true. If no mappable instances are found, returns false.

Returns:

  • (Boolean) 


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# File 'lib/objectmanager/owl/class.rb', line 122

def is_mappable?
  begin
#         STDERR.puts "studying #{self}"
    if @is_mappable.nil?
      self.instances.each do |resource|
#             STDERR.puts "examinining #{resource}"
        if resource.is_mappable?
#               STDERR.puts "yes"
          @is_mappable = true
          break;
        else
#               STDERR.puts "no"
          @is_mappable = false
          break;
        end
      end
    end
#         STDERR.puts "fine"
    return @is_mappable
  rescue
    @@log.error $!
    return false
  end
end

#markers(options = {}) ⇒ Object Also known as: geopoints

returns the instances of this class that have latitude and longitude



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# File 'lib/objectmanager/owl/class.rb', line 101

def markers( options={} )
  limit = options[ :limit ] || nil
  begin
    if @markers.nil? then
      @markers = ActiveRubic::Base.find( :markers, :class => self, :limit => limit )

        # sort alphabetically by label
#             @markers = @markers.sort_by { |i| i.labelize }

      @@log.debug "#{@markers.size} markers found"
  
    end
    return @markers
  rescue
    @@log.error $!
    return Array.new
  end
end