Class: Google::Visualization::DataColumn

Inherits:
DataElement show all
Defined in:
lib/google_visualization/data_column.rb

Overview

DataColumn

Description

Represents the schema of a column in a DataTable.

Instance Method Summary collapse

Methods inherited from DataElement

#custom_properties, #custom_properties_count, #custom_property, #store_custom_properties, #store_custom_property

Constructor Details

#initialize(type = nil, label = nil, id = nil) ⇒ DataColumn

Creates a new column.



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# File 'lib/google_visualization/data_column.rb', line 16

def initialize(type=nil, label=nil, id=nil)
  super()
  @closed = false
  self.id = id
  self.type = type || DataType::STRING
  self.label = label
  self.pattern = ""
end

Instance Method Details

#close ⇒ Object

Prevents the type from being altered.



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# File 'lib/google_visualization/data_column.rb', line 86

def close
  @closed = true
end

#closed? ⇒ Boolean

Returns true if closed.

Returns:

  • (Boolean) 


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# File 'lib/google_visualization/data_column.rb', line 93

def closed?
  @closed
end

#id ⇒ Object

Returns the id.



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# File 'lib/google_visualization/data_column.rb', line 28

def id
  @id
end

#id=(obj) ⇒ Object

Sets a id.



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# File 'lib/google_visualization/data_column.rb', line 35

def id=(obj)
  @id = obj
end

#label ⇒ Object

Returns the label.



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# File 'lib/google_visualization/data_column.rb', line 58

def label
  @label
end

#label=(obj) ⇒ Object

Sets a type.



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# File 'lib/google_visualization/data_column.rb', line 65

def label=(obj)
  @label = obj
end

#pattern ⇒ Object

Returns the pattern.



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# File 'lib/google_visualization/data_column.rb', line 72

def pattern
  @pattern
end

#pattern=(obj) ⇒ Object

Sets a pattern.



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# File 'lib/google_visualization/data_column.rb', line 79

def pattern=(obj)
  @pattern = obj
end

#type ⇒ Object

Returns the type.



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# File 'lib/google_visualization/data_column.rb', line 42

def type
  @type
end

#type=(obj) ⇒ Object

Sets a type.

Raises:

  • (StandardError) 


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# File 'lib/google_visualization/data_column.rb', line 49

def type=(obj)
  raise(StandardError, "can't modify closed column") if @closed
  raise(TypeError, "wrong argument type #{obj.class}, should be DataType") unless obj.is_a?(DataType)
  @type = obj
end