Module: VirtDisk::ExportMethods

Included in:
ClientHead, FileIo, PartitionType::DosPartition, PartitionType::GptPartition
Defined in:
lib/virt_disk/export_methods.rb

Overview

Note:

Every plug-in class must include this module, even if they don’t export any methods.

Utility module used by VirtDisk plug-ins, allowing them to export methods upstream.

Typically, VirtDisk plug-ins are linked in a chain - each plug-in communicating with the plug-in immediately upstream from it (where upstream is closer to the source of the data). The last downstream plug-in (the volume head) is the object accessed directly by the client.

This module enables upstream plug-ins to export methods, so they can be called directly from the volume head.

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object 



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# File 'lib/virt_disk/export_methods.rb', line 69

def method_missing(sym, *args)
  super unless respond_to_missing?(sym)
  @__delegate.send(sym, *args)
end

Class Method Details

.included(host_class) ⇒ Object 



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# File 'lib/virt_disk/export_methods.rb', line 40

def self.included(host_class)
  host_class.extend(ClassMethods)
end

Instance Method Details

#delegate ⇒ Object

The module immediately upstream from this one.

Returns:

  • (Object) —

    the module immediately upstream from this one.



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# File 'lib/virt_disk/export_methods.rb', line 54

def delegate
  @__delegate
end

#delegate=(obj) ⇒ Object

Set the module immediately upstream from this one.

Parameters:

  • obj (Object) —

    the upstream module.



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# File 'lib/virt_disk/export_methods.rb', line 47

def delegate=(obj)
  @__delegate = obj
end

#exported?(sym) ⇒ Boolean

Returns - true if sym is exported by this module’s class, false otherwise.

Parameters:

  • sym (Symbol)

Returns:

  • (Boolean) —

    • true if sym is exported by this module’s class, false otherwise.



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# File 'lib/virt_disk/export_methods.rb', line 60

def exported?(sym)
  self.class.exported?(sym)
end

#respond_to_missing?(sym, include_all = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/virt_disk/export_methods.rb', line 64

def respond_to_missing?(sym, include_all = false)
  return false unless @__delegate
  @__delegate.exported?(sym) || @__delegate.send(:respond_to_missing?, sym, include_all)
end