Class: Thrift::Union

Inherits:
Object
  • Object
show all
Defined in:
lib/thrift/union.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name = nil, value = nil) ⇒ Union

Returns a new instance of Union.



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# File 'lib/thrift/union.rb', line 23

def initialize(name = nil, value = nil)
  if name
    if name.is_a? Hash
      if name.size > 1
        raise "#{self.class} cannot be instantiated with more than one field!"
      end

      name, value = name.keys.first, name.values.first
    end

    if Thrift.type_checking
      raise Exception, "#{self.class} does not contain a field named #{name}!" unless name_to_id(name.to_s)
    end

    if value.nil?
      raise Exception, "Union #{self.class} cannot be instantiated with setfield and nil value!"
    end

    Thrift.check_type(value, struct_fields[name_to_id(name.to_s)], name) if Thrift.type_checking
  elsif !value.nil?
    raise Exception, "Value provided, but no name!"
  end
  @setfield = name
  @value = value
end

Class Method Details

.field_accessor(klass, field_info) ⇒ Object 



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# File 'lib/thrift/union.rb', line 105

def self.field_accessor(klass, field_info)
  klass.send :define_method, field_info[:name] do
    if field_info[:name].to_sym == @setfield
      @value
    else
      raise RuntimeError, "#{field_info[:name]} is not union's set field."
    end
  end

  klass.send :define_method, "#{field_info[:name]}=" do |value|
    Thrift.check_type(value, field_info, field_info[:name]) if Thrift.type_checking
    @setfield = field_info[:name].to_sym
    @value = value
  end
end

.generate_accessors(klass) ⇒ Object 



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# File 'lib/thrift/union.rb', line 127

def self.generate_accessors(klass)
  klass::FIELDS.values.each do |field_info|
    field_accessor(klass, field_info)
    qmark_isset_method(klass, field_info)
  end
end

.qmark_isset_method(klass, field_info) ⇒ Object 



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# File 'lib/thrift/union.rb', line 121

def self.qmark_isset_method(klass, field_info)
  klass.send :define_method, "#{field_info[:name]}?" do
    get_set_field == field_info[:name].to_sym && !get_value.nil?
  end
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/thrift/union.rb', line 146

def <=>(other)
  if self.class == other.class
    if get_set_field == other.get_set_field
      if get_set_field.nil?
        0
      else
        get_value <=> other.get_value
      end
    else
      if get_set_field && other.get_set_field.nil?
        -1
      elsif get_set_field.nil? && other.get_set_field
        1
      elsif get_set_field.nil? && other.get_set_field.nil?
        0
      else
        name_to_id(get_set_field.to_s) <=> name_to_id(other.get_set_field.to_s)
      end
    end
  else
    self.class <=> other.class
  end
end

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/thrift/union.rb', line 96

def ==(other)
  other.equal?(self) || other.instance_of?(self.class) && @setfield == other.get_set_field && @value == other.get_value
end

#get_set_field ⇒ Object

get the symbol that indicates what the currently set field type is.



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# File 'lib/thrift/union.rb', line 135

def get_set_field
  @setfield
end

#get_value ⇒ Object

get the current value of this union, regardless of what the set field is. generally, you should only use this method when you don't know in advance what field to expect.



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# File 'lib/thrift/union.rb', line 142

def get_value
  @value
end

#hash ⇒ Object 



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# File 'lib/thrift/union.rb', line 101

def hash
  [self.class.name, @setfield, @value].hash
end

#inspect ⇒ Object 



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# File 'lib/thrift/union.rb', line 49

def inspect
  if get_set_field
    "<#{self.class} #{@setfield}: #{inspect_field(@value, struct_fields[name_to_id(@setfield.to_s)])}>"
  else
    "<#{self.class} >"
  end
end

#read(iprot) ⇒ Object 



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# File 'lib/thrift/union.rb', line 57

def read(iprot)
  iprot.read_struct_begin
  fname, ftype, fid = iprot.read_field_begin
  handle_message(iprot, fid, ftype)
  iprot.read_field_end

  fname, ftype, fid = iprot.read_field_begin
  unless (ftype == Types::STOP)
    raise ProtocolException.new(ProtocolException::INVALID_DATA, "Too many fields for union")
  end

  iprot.read_struct_end
  validate
end

#write(oprot) ⇒ Object 



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# File 'lib/thrift/union.rb', line 72

def write(oprot)
  validate
  oprot.write_struct_begin(self.class.name)

  fid = self.name_to_id(@setfield.to_s)

  field_info = struct_fields[fid]
  unless field_info
    raise ProtocolException.new(ProtocolException::INVALID_DATA, "set_field is not valid for this union!")
  end

  type = field_info[:type]
  if is_container? type
    oprot.write_field_begin(@setfield, type, fid)
    write_container(oprot, @value, field_info)
    oprot.write_field_end
  else
    oprot.write_field(@setfield, type, fid, @value)
  end

  oprot.write_field_stop
  oprot.write_struct_end
end