121 lines
2.8 KiB
Ruby
121 lines
2.8 KiB
Ruby
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##
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## $Release: 2.6.5 $
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## copyright(c) 2006-2009 kuwata-lab.com all rights reserved.
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##
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require 'erubis/generator'
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require 'erubis/converter'
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require 'erubis/evaluator'
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require 'erubis/context'
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module Erubis
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##
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## (abstract) abstract engine class.
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## subclass must include evaluator and converter module.
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##
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class Engine
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#include Evaluator
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#include Converter
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#include Generator
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def initialize(input=nil, properties={})
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#@input = input
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init_generator(properties)
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init_converter(properties)
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init_evaluator(properties)
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@src = convert(input) if input
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end
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##
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## convert input string and set it to @src
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##
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def convert!(input)
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@src = convert(input)
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end
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##
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## load file, write cache file, and return engine object.
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## this method create code cache file automatically.
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## cachefile name can be specified with properties[:cachename],
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## or filname + 'cache' is used as default.
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##
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def self.load_file(filename, properties={})
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cachename = properties[:cachename] || (filename + '.cache')
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properties[:filename] = filename
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if test(?f, cachename) && File.mtime(filename) <= File.mtime(cachename)
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engine = self.new(nil, properties)
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engine.src = File.read(cachename)
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else
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input = File.open(filename, 'rb') {|f| f.read }
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engine = self.new(input, properties)
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File.open(cachename, 'wb') do |f|
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f.flock(File::LOCK_EX)
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f.write(engine.src)
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f.flush()
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end
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end
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engine.src.untaint # ok?
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return engine
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end
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##
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## helper method to convert and evaluate input text with context object.
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## context may be Binding, Hash, or Object.
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##
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def process(input, context=nil, filename=nil)
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code = convert(input)
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filename ||= '(erubis)'
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if context.is_a?(Binding)
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return eval(code, context, filename)
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else
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context = Context.new(context) if context.is_a?(Hash)
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return context.instance_eval(code, filename)
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end
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end
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##
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## helper method evaluate Proc object with contect object.
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## context may be Binding, Hash, or Object.
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##
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def process_proc(proc_obj, context=nil, filename=nil)
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if context.is_a?(Binding)
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filename ||= '(erubis)'
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return eval(proc_obj, context, filename)
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else
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context = Context.new(context) if context.is_a?(Hash)
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return context.instance_eval(&proc_obj)
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end
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end
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end # end of class Engine
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##
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## (abstract) base engine class for Eruby, Eperl, Ejava, and so on.
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## subclass must include generator.
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##
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class Basic::Engine < Engine
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include Evaluator
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include Basic::Converter
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include Generator
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end
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class PI::Engine < Engine
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include Evaluator
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include PI::Converter
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include Generator
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end
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end
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