Class: Iso191152Writer

Inherits:
Object
  • Object
show all
Defined in:
lib/adiwg/mdtranslator/writers/iso19115_2/iso19115_2_writer.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Iso191152Writer

Returns a new instance of Iso191152Writer.



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# File 'lib/adiwg/mdtranslator/writers/iso19115_2/iso19115_2_writer.rb', line 18

def initialize
end

Instance Method Details

#extentFromGeoElement(hGeoElement, geoType) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/writers/iso19115_2/iso19115_2_writer.rb', line 89

def extentFromGeoElement(hGeoElement, geoType)
  # build new extent to portray supplemental information
  # from elementGeometry
  if !hGeoElement[:temporalElements].empty? ||
    !hGeoElement[:verticalElements].empty? ||
    !hGeoElement[:elementIdentifiers].empty?

    # get unique id for geometry
    # if geometry id was missing, set it at this time so
    # ... it will match the supplemental information extent description
    geoID = hGeoElement[:elementId]
    if geoID.nil?
      $idCount = $idCount.succ
      geoID = geoType + $idCount
      hGeoElement[:elementId] = geoID
    end

    # build unique id for extent geometry
    $idCount = $idCount.succ
    extGeoID = geoType + $idCount

    intMetadataClass = InternalMetadata.new
    intExtent = intMetadataClass.newExtent
    intGeoEle = intMetadataClass.newGeoElement

    intGeoEle[:elementId] = extGeoID
    intGeoEle[:elementGeometry] = hGeoElement[:elementGeometry]

    intExtent[:extDesc] = 'Supplemental information for ' + geoID
    intExtent[:extGeoElements] << intGeoEle
    intExtent[:extIdElements] = hGeoElement[:elementIdentifiers]
    intExtent[:extTempElements] = hGeoElement[:temporalElements]
    intExtent[:extVertElements] = hGeoElement[:verticalElements]

    return intExtent

  else
    return nil
  end

end

#prescanGeoElements(internalObj) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/writers/iso19115_2/iso19115_2_writer.rb', line 36

def prescanGeoElements(internalObj)
  # supplemental information for the geographic element is carried in the
  # ... internal structure in the temporalElements:, verticalElements:,
  # ... and elementIdentifiers: attributes of the extGeoElements:
  # ... of the extent.
  # since temporal, vertical, and identify information in ISO is a property
  # ... of EX_Extent and not of the geographicElement,
  # ... this code creates a new extent for each geographicElement
  # ... that has supplemental information and
  # ... moves the supplemental information from the geometry to the new extent.
  # In this implementation, supplemental information is only allowed for
  # ... geometry types of Point, LineString, and Polygon
  aExtents = internalObj[:metadata][:resourceInfo][:extents]
  unless aExtents.empty?
    aExtents.each do |hExtent|
      aGeoElements = hExtent[:extGeoElements]
      unless aGeoElements.empty?
        aGeoElements.each do |hGeoElement|
          hGeometry = hGeoElement[:elementGeometry]
          unless hGeometry.empty?
            geoType = hGeometry[:geoType]
            case geoType
              when 'Point', 'LineString', 'Polygon'
                newExtent = extentFromGeoElement(hGeoElement, geoType)
                if !newExtent.nil?
                  aExtents << newExtent
                end

              when 'MultiGeometry'
                aGeoMembers = hGeometry[:geometry]
                unless aGeoMembers.empty?
                  aGeoMembers.each do |hGeoMemberElement|
                    hGeometry = hGeoMemberElement[:elementGeometry]
                    unless hGeometry.empty?
                      geoType = hGeometry[:geoType]
                      case geoType
                        when 'Point', 'LineString', 'Polygon'
                          newExtent = extentFromGeoElement(hGeoMemberElement, geoType)
                          if !newExtent.nil?
                            aExtents << newExtent
                          end
                      end
                    end
                  end
                end
            end
          end
        end
      end
    end
  end
end

#writeXML(internalObj) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/writers/iso19115_2/iso19115_2_writer.rb', line 21

def writeXML(internalObj)

  # pre-scan the internal object to create a new extents for each geometry
  # ... that has supplemental information (temporal, vertical, identity)
  # ... new extents will be added to internalObj as needed
  prescanGeoElements(internalObj)

  # create new XML document
  xml = Builder::XmlMarkup.new(indent: 3)
  metadataWriter = MI_Metadata.new(xml)
  metadata = metadataWriter.writeXML(internalObj)

  return metadata
end