Class: Google::Ads::GoogleAds::FieldMaskUtil

Inherits:
Object
  • Object
show all
Defined in:
lib/google/ads/google_ads/field_mask_util.rb

Overview

Utility for constructing FieldMask objects.

Copied from C# implementation courtesy of jonskeet@google.com

Constant Summary collapse

WRAPPER_TYPES = 
[Google::Protobuf::DoubleValue,
Google::Protobuf::FloatValue,
Google::Protobuf::Int64Value,
Google::Protobuf::UInt64Value,
Google::Protobuf::Int32Value,
Google::Protobuf::UInt32Value,
Google::Protobuf::BoolValue,
Google::Protobuf::StringValue,
Google::Protobuf::BytesValue].freeze

Class Method Summary collapse

Class Method Details

.all_set_fields_of(obj) ⇒ Object

Construct a field mask containing any fields set on the given object.

Example:

obj = MyObject.new
obj.some_property = 1
obj.other_property = 2

mask = FieldMaskUtil.all_set_fields_of obj

# the mask will contain the present properties "some_property" and
# "other_property"
api_client.mutate obj, mask

return [Google::Protobuf::FieldMask] the computed mask

Parameters:

  • obj (Object) —

    the object to watch



70
71
72
73
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 70

def self.all_set_fields_of(obj)
  new_instance = obj.class.new
  compare_obj(Google::Protobuf::FieldMask.new, '', new_instance, obj)
end

.compare(original, modified) ⇒ Google::Protobuf::FieldMask

Creates Google::Protobuf::FieldMask objects based on the difference between two objects.

Parameters:

  • original
  • modified

Returns:

  • (Google::Protobuf::FieldMask) —

    the computed mask



81
82
83
84
85
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 81

def self.compare(original, modified)
  raise 'nil cannot be compared' if original.nil? || modified.nil?
  raise 'objects of different types cannot be compared' if original.class != modified.class
  compare_obj(Google::Protobuf::FieldMask.new, '', original, modified)
end

.is_clearing_message?(original, modified) ⇒ Boolean

Checks if we’ve updated to a blank message in an attempt to clear an existing value.

Returns:

  • (Boolean) 


153
154
155
156
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 153

def self.is_clearing_message?(original, modified)
  (modified.nil? && !original.nil? && is_empty?(original)) ||
  (original.nil? && !modified.nil? && is_empty?(modified))
end

.is_empty?(object) ⇒ Boolean

Returns:

  • (Boolean) 


158
159
160
161
162
163
164
165
166
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 158

def self.is_empty?(object)
  fields = object.class.descriptor.entries
  fields.each do |field|
    if !is_empty_value? object[field.name]
      return false
    end
  end
  true
end

.is_empty_value?(value) ⇒ Boolean

Returns:

  • (Boolean) 


168
169
170
171
172
173
174
175
176
177
178
179
180
181
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 168

def self.is_empty_value?(value)
  # Some types throw errors if we try to do an == comparison, in
  # particular repeated fields that have data. If anything goes wrong,
  # just assume it's not empty.
  begin
    return value.nil? ||
      (value.respond_to?(:empty?) && value.empty?) ||
      value == false ||
      value == 0 ||
      value == :UNSPECIFIED
  rescue
    return false
  end
end

.with(obj) { ... } ⇒ Google::Protobuf::FieldMask

Construct a field mask containing any changes to the object made in the given block.

Example:

obj = MyObject.new
obj.some_property = 1

mask = FieldMaskUtil.with obj do
  obj.other_property = 2
end

# the mask will contain the changed property "other_property"
api_client.mutate obj, mask

Parameters:

  • obj (Object) —

    the object to watch

Yields:

  • block used for determining changes to the object

Returns:

  • (Google::Protobuf::FieldMask) —

    the computed mask



47
48
49
50
51
52
 
# File 'lib/google/ads/google_ads/field_mask_util.rb', line 47

def self.with(obj)
  raise 'nil cannot be compared' if obj.nil?
  original = obj.class.decode(obj.class.encode(obj))
  yield obj
  compare original, obj
end