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Versions: 19
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Contents
module Lolita
class LazyLoader
#attr_reader :lazy_class,:eval_block,:class_instance
def self.lazy_load(instance_name,var_name,lazy_class,*args,&block)
temp_var = instance_name.instance_variable_get(var_name)
is_loader = temp_var.to_s =~ /Lolita::LazyLoader/
if !temp_var || ((args && args.any? && is_loader && temp_var.__is_args_diff__(args)) || block_given?)
temp_var = instance_name.instance_variable_set(var_name,self.new(lazy_class,*args,&block))
end
if temp_var.to_s =~ /Lolita::LazyLoader/
temp_var = instance_name.instance_variable_set(var_name,temp_var.class_instance)
end
temp_var
end
def __is_args_diff__(args)
@args != args
end
def initialize(lazy_class,*args,&block)
@args = args || []
@lazy_class=lazy_class
@eval_block=block
end
def class_instance
@class_instance || self
end
def method_missing(method_name,*args,&block)
unless @class_instance
@args = @args.empty? && [nil] || @args
arity=@lazy_class.instance_method(:initialize).arity
if arity==-1 # when expectign *args
@class_instance=@lazy_class.new(*@args,&@eval_block)
elsif arity.abs>0 # when expecting specific number of arguments without any *args
@class_instance=@lazy_class.new(*@args.slice(0..arity.abs-1),&@eval_block)
else
@class_instance=@lazy_class.new(&@eval_block)
end
end
if @class_instance.respond_to?(:after_initialize,true)
@class_instance.__send__(:after_initialize)
end
@class_instance.__send__(method_name,*args,&block)
end
instance_methods.each { |method|
next if ["!","__is_args_diff__","hash","respond_to?","__id__","__send__","to_s","object_id","method_missing","class_instance","initialize", "__args__"].include?(method.to_s)
eval("undef :#{method}")
}
end
end
Version data entries
19 entries across 19 versions & 1 rubygems