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Contents
# Lazy object wrapper. # # Pass a block to the initializer, which returns an instance of the target # object. Lazy object forwards all method calls to the target. The block only # gets called the first time a method is forwarded. # # Example: # # lazy = LazyObject.new { VeryExpensiveObject.new } # At this point the VeryExpensiveObject hasn't been initialized yet. # lazy.get_expensive_results(foo, bar) # Initializes VeryExpensiveObject and calls 'get_expensive_results' on it, passing in foo and bar class LazyObject < BasicObject def self.version '0.0.3' end def initialize(&callable) @__callable__ = callable end def ==(item) __target_object__ == item end def !=(item) __target_object__ != item end def ! !__target_object__ end # Cached target object. def __target_object__ @__target_object__ ||= @__callable__.call end # Forwards all method calls to the target object. def method_missing(method_name, *args, &block) __target_object__.send(method_name, *args, &block) end end
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
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lazy_object-0.0.3 | lib/lazy_object.rb |