Class: Sus::Filter::Index

Inherits:
Object
  • Object
show all
Defined in:
lib/sus/filter.rb

Overview

Represents an index of contexts by their identity keys.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Index

Initialize a new Index.



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# File 'lib/sus/filter.rb', line 18

def initialize
	@contexts = {}
end

Instance Attribute Details

#contexts ⇒ Object (readonly)

Returns the value of attribute contexts.



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# File 'lib/sus/filter.rb', line 23

def contexts
  @contexts
end

Instance Method Details

#[](key) ⇒ Object

Look up a context by its key.



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# File 'lib/sus/filter.rb', line 51

def [] key
	@contexts[key]
end

#A hash mapping identity keys to contexts.=(hashmappingidentitykeystocontexts. = (value)) ⇒ Object 



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# File 'lib/sus/filter.rb', line 23

attr :contexts

#add(parent) ⇒ Object

Add all children from a parent context to the index.



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# File 'lib/sus/filter.rb', line 27

def add(parent)
	parent.children&.each do |identity, child|
		insert(identity, child)
		add(child)
	end
end

#insert(identity, context) ⇒ Object

Insert a context into the index.



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# File 'lib/sus/filter.rb', line 38

def insert(identity, context)
	key = identity.key
	
	if existing_context = @contexts[key]
		raise KeyError, "Assigning context to existing key: #{key.inspect}!"
	else
		@contexts[key] = context
	end
end