Class: Cql::Client::ColumnMetadata

Inherits:
Object
  • Object
show all
Defined in:
lib/cql/client/column_metadata.rb

Overview

Represents metadata about a column in a query result set or prepared statement. Apart from the keyspace, table and column names there’s also the type as a symbol (e.g. ‘:varchar`, `:int`, `:date`).

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ ColumnMetadata

Returns a new instance of ColumnMetadata.



12
13
14
 
# File 'lib/cql/client/column_metadata.rb', line 12

def initialize(*args)
  @keyspace, @table, @column_name, @type = args
end

Instance Attribute Details

#column_name ⇒ Object (readonly)

Returns the value of attribute column_name.



9
10
11
 
# File 'lib/cql/client/column_metadata.rb', line 9

def column_name
  @column_name
end

#keyspace ⇒ Object (readonly)

Returns the value of attribute keyspace.



9
10
11
 
# File 'lib/cql/client/column_metadata.rb', line 9

def keyspace
  @keyspace
end

#table ⇒ Object (readonly)

Returns the value of attribute table.



9
10
11
 
# File 'lib/cql/client/column_metadata.rb', line 9

def table
  @table
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



9
10
11
 
# File 'lib/cql/client/column_metadata.rb', line 9

def type
  @type
end

Instance Method Details

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

Returns:

  • (Boolean) 


21
22
23
 
# File 'lib/cql/client/column_metadata.rb', line 21

def eql?(other)
  self.keyspace == other.keyspace && self.table == other.table && self.column_name == other.column_name && self.type == other.type
end

#hash ⇒ Object 



26
27
28
29
30
31
32
33
34
35
 
# File 'lib/cql/client/column_metadata.rb', line 26

def hash
  @h ||= begin
    h = 0
    h = ((h & 33554431) * 31) ^ @keyspace.hash
    h = ((h & 33554431) * 31) ^ @table.hash
    h = ((h & 33554431) * 31) ^ @column_name.hash
    h = ((h & 33554431) * 31) ^ @type.hash
    h
  end
end

#to_ary ⇒ Object 



17
18
19
 
# File 'lib/cql/client/column_metadata.rb', line 17

def to_ary
  [@keyspace, @table, @column_name, @type]
end