Class: VmPackage

Inherits:
Object
  • Object
show all
Defined in:
lib/ovfparse/vmpackage.rb

Constant Summary collapse

OVA = 
0
OVF = 
1
ISO = 
2
DEBUG_MODE = 
false
PRODUCT_ATTRIBUTES =

List of attributes in an OVF product that we will extract / set

[ {'full_name' => 'ovf:instance', 'node_ref' => 'instance', 'attribute_ref' => 'instance'},
{'full_name' => 'ovf:class', 'node_ref' => 'class', 'attribute_ref' => 'product_class'},
{'full_name' => 'cops:cpetag', 'node_ref' => 'cpetag', 'attribute_ref' => 'cpe_tag'} ]
PRODUCT_ELEMENTS =

List of elements in an OVF product that we will extract / set

[ {'full_name' => 'Info', 'node_ref' => 'Info', 'element_ref' => 'description', 'required' => false},
{'full_name' => 'Product', 'node_ref' => 'Product', 'element_ref' => 'name', 'required' => false},
{'full_name' => 'Vendor', 'node_ref' => 'Vendor', 'element_ref' => 'vendor', 'required' => false},
{'full_name' => 'Version', 'node_ref' => 'Version', 'element_ref' => 'version', 'required' => false} ]
PROPERTY_ATTRIBUTES =

List of attributes in an OVF property that we will extract / set

[ {'full_name' => 'ovf:value', 'node_ref' => 'value', 'attribute_ref' => 'value'},
{'full_name' => 'ovf:key', 'node_ref' => 'key', 'attribute_ref' => 'key'},
{'full_name' => 'ovf:userConfigurable', 'node_ref' => 'userConfigurable', 'attribute_ref' => 'userConfigurable'},
{'full_name' => 'ovf:password', 'node_ref' => 'password', 'attribute_ref' => 'password'},
{'full_name' => 'ovf:required', 'node_ref' => 'required', 'attribute_ref' => 'required'},
{'full_name' => 'ovf:type', 'node_ref' => 'type', 'attribute_ref' => 'value_basetype'},
{'full_name' => 'cops:valueType', 'node_ref' => 'valueType', 'attribute_ref' => 'valueType'}, # @todo refactor to cops extension module
{'full_name' => 'cops:uuid', 'node_ref' => 'uuid', 'attribute_ref' => 'uuid'} ]
PROPERTY_ELEMENTS =

List of elements in an OVF property that we will extract / set

[ {'full_name' => 'Label', 'node_ref' => 'Label', 'element_ref' => 'name', 'required' => false},
{'full_name' => 'Description', 'node_ref' => 'Description', 'element_ref' => 'description', 'required' => false},
{'full_name' => 'Example', 'node_ref' => 'cops:Example', 'element_ref' => 'example', 'required' => true}, # @todo refactor to cops extension module
{'full_name' => 'NoneType', 'node_ref' => 'cops:NoneType', 'element_ref' => 'nonetype', 'required' => true} ]
OVF_NAMESPACE = 
{'ovf' => 'http://schemas.dmtf.org/ovf/envelope/1'}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(uri) ⇒ VmPackage

Returns a new instance of VmPackage.



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# File 'lib/ovfparse/vmpackage.rb', line 60

def initialize 
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 150

def method_missing(method)
  if DEBUG_MODE
    puts "WARNING: NoSuchMethod Error: " + method.to_s + " ...trying XPath query \n"
  end 

  # try with namespace
  data = @xml.xpath("//ovf:" + method.to_s)


  # try without namespace
  if nil===data then
    data = @xml.xpath("//" + method.to_s)
  end

  # try changing method name without namespace
  # i.e. egg_and_ham.classify #=> "EggAndHam"
  if nil==data then
    data = @xml.xpath("//" + method.to_s.classify)
  end

  # try changing method name with namespace
  # i.e. egg_and_ham.classify #=> "EggAndHam"
  if nil==data then
    data = @xml.xpath("//ovf:" + method.to_s.classify)
  end

  return data

end

Instance Attribute Details

#base_path ⇒ Object

Returns the value of attribute base_path.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def base_path
  @base_path
end

#diskSection ⇒ Object

Returns the value of attribute diskSection.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def diskSection
  @diskSection
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def name
  @name
end

#networkSection ⇒ Object

Returns the value of attribute networkSection.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def networkSection
  @networkSection
end

#protocol ⇒ Object

Returns the value of attribute protocol.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def protocol
  @protocol
end

#references ⇒ Object

Returns the value of attribute references.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def references
  @references
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def size
  @size
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def state
  @state
end

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def url
  @url
end

#version ⇒ Object

Returns the value of attribute version.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def version
  @version
end

#virtualSystem ⇒ Object

Returns the value of attribute virtualSystem.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def virtualSystem
  @virtualSystem
end

#xml ⇒ Object

Returns the value of attribute xml.



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# File 'lib/ovfparse/vmpackage.rb', line 57

def xml
  @xml
end

Class Method Details

.construct_skeleton ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 614

def self.construct_skeleton
   builder = Nokogiri::XML::Builder.new(:encoding => 'UTF-8') do |xml|
    xml.Envelope('xmlns' => 'http://schemas.dmtf.org/ovf/envelope/1', 'xmlns:cim' => "http://schemas.dmtf.org/wbem/wscim/1/common", 'xmlns:ovf' => "http://schemas.dmtf.org/ovf/envelope/1", 'xmlns:rasd' => "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData", 'xmlns:vmw' => "http://www.vmware.com/schema/ovf", 'xmlns:vssd' => "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData", 'xmlns:xsi' => "http://www.w3.org/2001/XMLSchema-instance") {
        xml.References{}
        xml.DiskSection{
           xml.Info "Virtual disk information"
        }
        xml.NetworkSection{
           xml.Info "List of logical networks"
        }
        xml.VirtualSystem('id' => "vm"){
           xml.Info "A virtual machine"
           xml.Name "New Virtual Machine"
           xml.OperatingSystemSection('id' => "94"){
               xml.Info "The kind of guest operating system"
           }
           xml.VirtualHardwareSection{
               xml.Info "Virtual hardware requirements"
               xml.System{
                   xml['vssd'].ElementName "Virtual Hardware Family"
                   xml['vssd'].InstanceID "0"
                   xml['vssd'].VirtualSystemIdentifier "New Virtual Machine"
               }
               xml.Item{
                   xml['rasd'].AllocationUnits "herts * 10^6"
                   xml['rasd'].Description "Number of Virtual CPUs"
                   xml['rasd'].ElementName "1 Virtual CPU(s)"
                   xml['rasd'].InstanceID "1"
                   xml['rasd'].ResourceType "3"
                   xml['rasd'].VirtualQuantity "1"
               }
               xml.Item{
                   xml['rasd'].AllocationUnits "byte * 2^20"
                   xml['rasd'].Description "Memory Size"
                   xml['rasd'].ElementName "512MB of memory"
                   xml['rasd'].InstanceID "2"
                   xml['rasd'].ResourceType "4"
                   xml['rasd'].VirtualQuantity "512"
               }
           }
        }
    }

    node = Nokogiri::XML::Comment.new(xml.doc, ' skeleton framework constructed by OVFparse ')
    xml.doc.children[0].add_previous_sibling(node)
  end

  builder.doc.root.children[3].attribute("id").namespace = builder.doc.root.namespace_definitions.detect{ |ns| ns.prefix == "ovf"}
  builder.doc.root.children[3].children[2].attribute("id").namespace = builder.doc.root.namespace_definitions.detect{ |ns| ns.prefix == "ovf"}
    
  newPackage = NewVmPackage.new
  newPackage.xml = builder.doc
  newPackage.loadElementRefs
  return newPackage
end

.create(uri) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 88

def self.create uri
  (@protocol, @url) = uri.split(":", 2) unless !uri
  @url.sub!(/^\/{0,2}/, '')
  @protocol.downcase
  @url.downcase
  if @protocol=='ftp'
    FtpVmPackage.new(uri)
  elsif @protocol=='http'
    HttpVmPackage.new(uri)
  elsif @protocol=='https'
    HttpsVmPackage.new(uri)
  elsif @protocol=='file'
    FileVmPackage.new(uri)
  elsif @protocol.match(/esx/)
    if @protocol.match(/esx4/)
      Esx4VmPackage.new(uri)
    else
      raise NotImplementedError, "Cannot handle this version of ESX: " + @protocol + "\n"
    end
  elsif @protocol.match(/vc/)
    if @protocol.match(/vc4/)
      Vc4VmPackage.new(uri)
    else
      raise NotImplementedError, "Cannot handle this version of VirtualCenter: " + @protocol + "\n"
    end
  else
    raise NotImplementedError, "Unknown Protocol: " + @protocol + " (bad URI string?)\n"
    VmRepository.new(uri)
  end
end

Instance Method Details

#buildNewIDEController(vhs, rasdNamespace, newID, newAddress) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 417

def buildNewIDEController(vhs, rasdNamespace, newID, newAddress)
   new_controller = vhs.add_child(xml.create_element('Item', {}))
   new_controller.add_child(xml.create_element('Address', newAddress)).namespace = rasdNamespace
   new_controller.add_child(xml.create_element('Description', "IDE Controller " + newAddress)).namespace = rasdNamespace
   new_controller.add_child(xml.create_element('ElementName', "IDEController" + newAddress)).namespace = rasdNamespace
   new_controller.add_child(xml.create_element('InstanceID', newID)).namespace = rasdNamespace
   new_controller.add_child(xml.create_element('ResourceType', "5")).namespace = rasdNamespace
end

#checkschema(schema) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 180

def checkschema(schema)
  response = ""

  isValid = true    
  schema.validate(@xml).each do |error|
    response << error.message + "\n"
    isValid = false
  end

  return [isValid, response]
end

#fetch ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 120

def fetch
end

#getChildByName(node, childName) ⇒ Object

Returns the first child node of the passed node whose name matches the passed name.



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# File 'lib/ovfparse/vmpackage.rb', line 137

def getChildByName(node, childName)
   return node.nil? ? nil : node.children.detect{ |element| element.name == childName}
end

#getChildrenByName(node, childName) ⇒ Object

Returns every child node of the passed node whose name matches the passed name.



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# File 'lib/ovfparse/vmpackage.rb', line 142

def getChildrenByName(node, childName)
   return node.nil? ? [] : node.children.select{ |element| element.name == childName}
end

#getFirstOpenIDEAddress(vhs, rasdNamespace, maxID) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 426

def getFirstOpenIDEAddress(vhs, rasdNamespace, maxID)
   items = getChildrenByName(vhs, 'Item')
   ide_controllers = items.select{ |item| getChildByName(item, 'ResourceType').content == '5' }

   if(ide_controllers.length == 0)
      buildNewIDEController(vhs, rasdNamespace, maxID, '0')
      return [maxID, '0']

   elsif(ide_controllers.length == 1)
      controller = ide_controllers[0]
      controllerAddress = getChildByName(controller, 'Address').content
      open_address = getOpenChannelOnIDEController(controller, items)
      if(open_address == '0' || open_address == '1')
         return [getChildByName(controller, 'InstanceID').content, open_address]
      elsif(!open_address && controllerAddress == '0')
         buildNewIDEController(vhs, rasdNamespace, maxID, '1')
         return [maxID, '0']
      else
         buildNewIDEController(vhs, rasdNamespace, maxID, '0')
         return [maxID, '0']
      end

   else
      controller = ide_controllers[0]
      controllerAddress = getChildByName(controller, 'Address').content
      open_address = getOpenChannelOnIDEController(controller, items)
      if(open_address == '0' || open_address == '1')
         return [getChildByName(controller, 'InstanceID').content, open_address]
      else
         controller = ide_controllers[1]
         controllerAddress = getChildByName(controller, 'Address').content
         open_address = getOpenChannelOnIDEController(controller, items)
         if(open_address == '0' || open_address == '1')
            return [getChildByName(controller, 'InstanceID').content, open_address]
         else
            return false
         end
      end
   end
end

#getOpenChannelOnIDEController(controller, items) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 396

def getOpenChannelOnIDEController(controller, items)
   currentAddress = getChildByName(controller, 'InstanceID').content
   controllerChildren = items.select{ |item| 
      parentNode = getChildByName(item, 'Parent')
      unless(parentNode.nil?)
         parentNode.content == currentAddress
      end
   }
   childAddresses = Array.new
   controllerChildren.each{ |child|
      childAddresses.push(getChildByName(child, 'AddressOnParent').content)
   }
   if(childAddresses.length == 0 || (childAddresses.length == 1 && childAddresses[0] == '1'))
      return '0'
   elsif(childAddresses.length == 1)
      return '1'
   else
      return false
   end
end

#getVirtualQuantity(resource) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 283

def getVirtualQuantity(resource)
  getChildrenByName(getChildByName(virtualSystem, 'VirtualHardwareSection'), 'Item').each{ |node|
    resourceType = node.xpath('rasd:ResourceType')[0].text
    resourceType == resource.to_s ? (return node.xpath('rasd:VirtualQuantity')[0].text) : next
  }
end

#getVmAttributes ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 220

def getVmAttributes
   return {
      'name' => getVmName,
      'description' => getVmDescription,
      'OS' => getVmOS_ID,
      'patch_level' => getVmPatchLevel,
      'CPUs' => getVmCPUs,
      'RAM' => getVmRAM
   }
end

#getVmCPUs ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 275

def getVmCPUs
  return getVirtualQuantity(3)
end

#getVmDescription ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 196

def getVmDescription
  descNode = getChildByName(virtualSystem, 'Info')
  return descNode.nil? ? '' : descNode.content
end

#getVmDisks ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 231

def getVmDisks
  disks = Array.new
  filenames = Hash.new
  getChildrenByName(references, 'File').each { |node|
    filenames[node['id']] = node['href']
  }

  getChildrenByName(diskSection, 'Disk').each { |node|
    capacity = node['capacity']
    units = node['capacityAllocationUnits']
    if(units == "byte * 2^40")
       capacity = (capacity.to_i * 1099511627776).to_s
    elsif(units == "byte * 2^30")
       capacity = (capacity.to_i * 1073741824).to_s
    elsif(units == "byte * 2^20")
       capacity = (capacity.to_i * 1048576).to_s
    elsif(units == "byte * 2^10")
       capacity = (capacity.to_i * 1024).to_s
    end
    thin_size = node['populatedSize']
    disks.push({ 'name' => node['diskId'], 'location' => filenames[node['fileRef']], 'size' => capacity, 'thin_size' => (thin_size || "-1") })
  }

  return disks
end

#getVmName ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 192

def getVmName
  return virtualSystem['id'] || ''
end

#getVmNetworks ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 257

def getVmNetworks
  networks = Array.new
  getChildrenByName(networkSection, 'Network').each { |node|
    descriptionNode = getChildByName(node, 'Description')
    text = descriptionNode.nil? ? '' : descriptionNode.text
    networks.push({'location' => node['name'], 'notes' => text })
  }
  return networks
end

#getVmOS ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 206

def getVmOS
  os = getVmOS_ID
  return os == '' ? '' : OS_ID_TABLE[os.to_i]
end

#getVmOS_ID ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 201

def getVmOS_ID
  osNode = getChildByName(virtualSystem, 'OperatingSystemSection')
  return osNode.nil? ? '' : osNode['id']
end

#getVmPatchLevel ⇒ Object

note this is not part of the OVF spec. Specific users could overwrite this method to store/retrieve patch level in the description field, for example.



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# File 'lib/ovfparse/vmpackage.rb', line 214

def getVmPatchLevel
end

#getVmRAM ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 279

def getVmRAM
  return getVirtualQuantity(4)
end

#getVmReferences ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 267

def getVmReferences
  refs = Array.new
  getChildrenByName(references, 'File').each { |node|
     refs.push({'href' => node['href'], 'id' => node['id'], 'size' => node['size']})
  }
  return refs
end

#loadElementRefs ⇒ Object

Caches all of the base elements inside Envelope for fast access



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# File 'lib/ovfparse/vmpackage.rb', line 125

def loadElementRefs
   children = @xml.root.children

   @references = getChildByName(xml.root, 'References')
   @virtualSystem = getChildByName(xml.root, 'VirtualSystem')

   @diskSection = getChildByName(xml.root, 'DiskSection') || @virtualSystem.add_previous_sibling(xml.create_element('DiskSection', {}))
   @networkSection = getChildByName(xml.root, 'NetworkSection') || @virtualSystem.add_previous_sibling(xml.create_element('NetworkSection', {}))

end

#referenced_file(element) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 146

def referenced_file(element) 
  @xml.xpath("//ovf:References/ovf:File[@ovf:id='#{element['fileRef']}']", OVF_NAMESPACE).first
end

#removeDisksFromVirtualHardwareSection ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 385

def removeDisksFromVirtualHardwareSection
   vhs = getChildByName(virtualSystem, 'VirtualHardwareSection') || virtualSystem.add_child(xml.create_element('VirtualHardwareSection', {}))
   items = getChildrenByName(vhs, 'Item')
   items.each { |item|
      id = getChildByName(item, 'ResourceType')
      if(id.content == '17')
         item.unlink
      end
   }
end

#removeNetworksFromVirtualHardwareSection ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 320

def removeNetworksFromVirtualHardwareSection
   vhs = getChildByName(virtualSystem, 'VirtualHardwareSection') || virtualSystem.add_child(xml.create_element('VirtualHardwareSection', {}))
   items = getChildrenByName(vhs, 'Item')
   items.each { |item|
      id = getChildByName(item, 'ResourceType')
      if(id.content == '10')
         item.unlink
      end
   }
end

#setAttributes(updated_element, parent_node, attribute_list) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 604

def setAttributes(updated_element, parent_node, attribute_list)
   attribute_list.each { |attribute_details|
      updated_value = updated_element[attribute_details['attribute_ref']]
     # (updated_value == '' || updated_value.nil?) ? parent_node.delete(attribute_details['node_ref']) :
      parent_node[attribute_details['full_name']] = updated_value || ''
   }
end

#setElements(updated_element, parent_node, element_list) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 588

def setElements(updated_element, parent_node, element_list)
   element_list.each { |element_details|
      updated_value = updated_element[element_details['element_ref']]
      element_node = getChildByName(parent_node, element_details['full_name'])
      #if((updated_value == '' || updated_value.nil?) && !element_node.nil?)
      #   element_node.unlink
      #elsif(updated_value != '' && !updated_value.nil?)
         element_node = element_node.nil? ? parent_node.add_child(xml.create_element(element_details['node_ref'], {})) : parent_node.add_child(element_node)
         element_node.content = updated_value || ''
         if(element_details['required'])
            element_node['ovf:required'] = 'false'
         end
     # end
   }
end

#setProductIcon(new_icon, productNode) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 559

def setProductIcon(new_icon, productNode)
   iconNode = getChildByName(productNode, 'Icon')
   if((new_icon == '' || new_icon.nil?) && !iconNode.nil?)
      getChildrenByName(references, 'File').detect { |fileNode| fileNode['id'] == iconNode['fileRef']}.unlink
      iconNode.unlink
   elsif(new_icon != '' && !new_icon.nil?)
      if(iconNode.nil?)
         productNode.add_child(xml.create_element('Icon', {'ovf:fileRef' => productNode['class'] + '_icon'}))
         iconRef = getChildrenByName(references, 'File').detect { |fileNode| fileNode['href'] == new_icon} ||
            references.add_child(xml.create_element('File', {'ovf:href' => new_icon}))
         iconRef['ovf:id'] = productNode['class'] + '_icon'
      else
         productNode.add_child(iconNode)
         getChildrenByName(references, 'File').detect { |fileNode| fileNode['id'] == iconNode['fileRef']}['ovf:href'] = new_icon
      end
   end
end

#setPropertyDefault(key, newVal) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 577

def setPropertyDefault(key, newVal)
   getChildrenByName(virtualSystem, "ProductSection").each{ |product|
      getChildrenByName(product, "Property").each{ |property|
         if(property['key'] == key)
            property['ovf:value'] = newVal
            return
         end
      }
   }
end

#setVirtualQuantity(resource, newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 313

def setVirtualQuantity(resource, newValue)
  getChildrenByName(getChildByName(virtualSystem, 'VirtualHardwareSection'), 'Item').each { |node|
    resourceType = node.xpath('rasd:ResourceType')[0].text
    resourceType == resource.to_s ? (node.xpath('rasd:VirtualQuantity')[0].content = newValue) : next
  }
end

#setVmAttributes(attributes) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 538

def setVmAttributes(attributes)
  if attributes['name']
    setVmName(attributes['name'])
  end
  if attributes['description']
    setVmDescription(attributes['description'])
  end
  if attributes['OS']
    setVmOS_ID(attributes['OS'])
  end
  if attributes['patch_level']
    setVmPatchLevel(attributes['patch_level'])
  end
  if attributes['CPUs']
    setVmCPUs(attributes['CPUs'])
  end
  if attributes['RAM']
    setVmRAM(attributes['RAM'])
  end
end

#setVmCPUs(newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 305

def setVmCPUs(newValue)
  setVirtualQuantity(3, newValue)
end

#setVmDescription(newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 297

def setVmDescription(newValue)
  getChildByName(virtualSystem, 'Info').content = newValue
end

#setVmDisks(disks) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 467

def setVmDisks(disks)
   removeDisksFromVirtualHardwareSection

   fileNodes = getChildrenByName(references, 'File')
   diskNodes = getChildrenByName(diskSection, 'Disk')
   vhs = getChildByName(virtualSystem, 'VirtualHardwareSection')

   icons = Array.new
   getChildrenByName(getChildByName(virtualSystem, 'ProductSection'), 'Icon').each { |node|
      icons.push(node['fileRef'])
   }

   fileNodes.each { |file_node|
      updated_disk = disks.detect { |disk| disk.location == file_node['href'] }
      old_disk_node = diskNodes.detect { |old_node| old_node['id'] == file_node['fileRef'] }

      if(updated_disk.nil?)
         if((icons.detect { |fileRef| fileRef == file_node['id'] }).nil?)
            file_node.unlink
            if(!old_disk_node.nil?)
               old_disk_node.unlink
            end
         end
      else
         file_node['ovf:id'] = updated_disk.name + '_disk'
         old_disk_node = old_disk_node || diskSection.add_child(xml.create_element('Disk', {}))
         old_disk_node['ovf:fileRef'] = updated_disk.name + '_disk'
         old_disk_node['ovf:capacity'] = updated_disk.size.to_s
         old_disk_node['ovf:diskId'] = updated_disk.name
         old_disk_node['ovf:capacityAllocationUnits'] = "byte * 2^30"
         old_disk_node['ovf:format'] = "http://www.vmware.com/interfaces/specifications/vmdk.html#streamOptimized" 
      end
   }

   # Find the highest instance ID
   maxID = 0
   items = getChildrenByName(vhs, 'Item')
   items.each { |item|
      itemID = getChildByName(item, 'InstanceID').content.to_i
      if(itemID > maxID)
         maxID = itemID
      end
   }

   rasdNamespace = xml.root.namespace_definitions.detect{ |ns| ns.prefix == 'rasd' }

   disks.each { |disk|
      if( (fileNodes.detect { |node| disk.location == node['href'] }).nil?)
         diskSection.add_child(xml.create_element('Disk', {'ovf:capacity' => disk.size.to_s, 'ovf:capacityAllocationUnits' => "byte * 2^30", 'ovf:diskId' => disk.name, 'ovf:fileRef' => disk.name + '_disk', 'ovf:format' => "http://www.vmware.com/interfaces/specifications/vmdk.html#streamOptimized" }))
         references.add_child(xml.create_element('File', {'ovf:href' => disk.location, 'ovf:id' => disk.name + '_disk'}))
      end

      maxID += 1
      address = getFirstOpenIDEAddress(vhs, rasdNamespace, maxID)
      if(!address)
         # PANIC BECAUSE THIS IS BAD MAN, NO AVAILABLE IDE SLOTS
         raise "No IDE slots available"
      else
         maxID += 1
         newDisk = vhs.add_child(xml.create_element('Item', {}))
         newDisk.add_child(xml.create_element('AddressOnParent', address[1])).namespace = rasdNamespace
         newDisk.add_child(xml.create_element('ElementName', disk.name)).namespace = rasdNamespace
         newDisk.add_child(xml.create_element('HostResource', "ovf:/disk/" + disk.name)).namespace = rasdNamespace
         newDisk.add_child(xml.create_element('InstanceID', maxID.to_s)).namespace = rasdNamespace
         newDisk.add_child(xml.create_element('Parent', address[0])).namespace = rasdNamespace
         newDisk.add_child(xml.create_element('ResourceType', "17")).namespace = rasdNamespace
      end
   }

end

#setVmName(newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 290

def setVmName(newValue)
  virtualSystem['ovf:id'] = newValue
  nameNode = getChildByName(virtualSystem, 'Name') ||
     getChildByName(virtualSystem, 'Info').add_next_sibling(xml.create_element('Name', {}))
  nameNode.content = newValue
end

#setVmNetworks(networks) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 331

def setVmNetworks(networks)
   removeNetworksFromVirtualHardwareSection

   networkNodes = getChildrenByName(networkSection, 'Network')
   vhs = getChildByName(virtualSystem, 'VirtualHardwareSection')

   networkNodes.each { |node|
      updated_network = networks.detect { |network| network.location == node['name'] }
      if(updated_network.nil?)
         node.unlink
      else
         descriptionNode = getChildByName(node, 'Description')
         if((updated_network.notes == '' || updated_network.notes.nil?) && !descriptionNode.nil?)
            descriptionNode.unlink
         elsif(updated_network.notes != '' && !updated_network.notes.nil?)
descriptionNode = descriptionNode || descriptionNode.add_child(xml.create_element("Description", {}))
            descriptionNode.content = updated_network.notes
         end
      end
   }

   # Find the highest instance ID
   maxID = 0
   items = getChildrenByName(vhs, 'Item')
   items.each { |item|
      itemID = getChildByName(item, 'InstanceID').content.to_i
      if(itemID > maxID)
         maxID = itemID
      end
   }

   rasdNamespace = xml.root.namespace_definitions.detect{ |ns| ns.prefix == 'rasd' }
   netCount = 0

   networks.each { |network|
      if( (networkNodes.detect { |node| network.location == node['name'] }).nil?)
         networkNode = networkSection.add_child(xml.create_element('Network', {'ovf:name' => network.location}))
         if(network.notes != '' && !network.notes.nil?)
            networkNode.add_child(xml.create_element('Description', network.notes))
         end
      end

      maxID += 1
      newNetwork = vhs.add_child(xml.create_element('Item', {}))
      newNetwork.add_child(xml.create_element('AutomaticAllocation', "true")).namespace = rasdNamespace
      newNetwork.add_child(xml.create_element('Connection', network.location)).namespace = rasdNamespace
      newNetwork.add_child(xml.create_element('ElementName', "ethernet" + netCount.to_s)).namespace = rasdNamespace
      newNetwork.add_child(xml.create_element('InstanceID', maxID.to_s)).namespace = rasdNamespace
      newNetwork.add_child(xml.create_element('ResourceSubType', "PCNet32")).namespace = rasdNamespace
      newNetwork.add_child(xml.create_element('ResourceType', "10")).namespace = rasdNamespace
      netCount += 1
   }
end

#setVmOS_ID(newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 301

def setVmOS_ID(newValue)
  getChildByName(virtualSystem, 'OperatingSystemSection')['ovf:id'] = newValue.to_s
end

#setVmPatchlevel ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 217

def setVmPatchlevel
end

#setVmRAM(newValue) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 309

def setVmRAM(newValue)
  setVirtualQuantity(4, newValue)
end

#sign(signature) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 677

def sign(signature)
  node = Nokogiri::XML::Comment.new(xml, signature)
  xml.children[0].add_next_sibling(node)
end

#to_s ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 63

def to_s 
#    (@name + " from " + @url + "\n")
  self.uri 
end

#uri ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 68

def uri 
  if (nil==@protocol) then
    return @url
  else 
    return (@protocol + "://" + @url)
  end
end

#writeXML(filename) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 670

def writeXML(filename)
   file = File.new(filename, "w")
   file.puts(xml.to_s)
   file.close
end

#xpath(string) ⇒ Object 



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# File 'lib/ovfparse/vmpackage.rb', line 682

def xpath(string)
  puts @xml.xpath(string)
end