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Class: SQLite3::Database::FunctionProxy

Relationships & Source Files
Inherits: Object
Defined in: lib/sqlite3/database.rb

Overview

A helper class for dealing with custom functions (see #create_function, #create_aggregate, and #create_aggregate_handler). It encapsulates the opaque function object that represents the current invocation. It also provides more convenient access to the API functions that operate on the function object.

This class will almost always be instantiated indirectly, by working with the create methods mentioned above.

Class Method Summary

Instance Attribute Summary

Instance Method Summary

  • #[](key)

    Returns the value with the given key from the context.

  • #[]=(key, value)

    Sets the value with the given key in the context.

Constructor Details

.new ⇒ FunctionProxy

Create a new FunctionProxy that encapsulates the given func object. If context is non-nil, the functions context will be set to that. If it is non-nil, it must quack like a Hash. If it is nil, then none of the context functions will be available.

[ GitHub ] 

  


# File 'lib/sqlite3/database.rb', line 768



def initialize
  @result = nil
  @context = {}
end


  







Instance Attribute Details



  

    #result   (rw)
  

  [ GitHub ]


  

  


# File 'lib/sqlite3/database.rb', line 762



attr_accessor :result


  







Instance Method Details



  

    #[](key)  
  



  

    

Returns the value with the given key from the context. This is only available to aggregate functions.


  



  [ GitHub ]


  

  


# File 'lib/sqlite3/database.rb', line 775



def [](key)
  @context[key]
end


  








  

    #[]=(key, value)  
  



  

    

Sets the value with the given key in the context. This is only available to aggregate functions.


  



  [ GitHub ]


  

  


# File 'lib/sqlite3/database.rb', line 781



def []=(key, value)
  @context[key] = value
end