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diff --git a/jni/ruby/lib/irb/inspector.rb b/jni/ruby/lib/irb/inspector.rb
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+#
+#   irb/inspector.rb - inspect methods
+#   	$Release Version: 0.9.6$
+#   	$Revision: 1.19 $
+#   	$Date: 2002/06/11 07:51:31 $
+#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
+#
+# --
+#
+#
+#
+
+module IRB # :nodoc:
+
+
+  # Convenience method to create a new Inspector, using the given +inspect+
+  # proc, and optional +init+ proc and passes them to Inspector.new
+  #
+  #     irb(main):001:0> ins = IRB::Inspector(proc{ |v| "omg! #{v}" })
+  #     irb(main):001:0> IRB.CurrentContext.inspect_mode = ins # => omg! #<IRB::Inspector:0x007f46f7ba7d28>
+  #     irb(main):001:0> "what?" #=> omg! what?
+  #
+  def IRB::Inspector(inspect, init = nil)
+    Inspector.new(inspect, init)
+  end
+
+  # An irb inspector
+  #
+  # In order to create your own custom inspector there are two things you
+  # should be aware of:
+  #
+  # Inspector uses #inspect_value, or +inspect_proc+, for output of return values.
+  #
+  # This also allows for an optional #init+, or +init_proc+, which is called
+  # when the inspector is activated.
+  #
+  # Knowing this, you can create a rudimentary inspector as follows:
+  #
+  #     irb(main):001:0> ins = IRB::Inspector.new(proc{ |v| "omg! #{v}" })
+  #     irb(main):001:0> IRB.CurrentContext.inspect_mode = ins # => omg! #<IRB::Inspector:0x007f46f7ba7d28>
+  #     irb(main):001:0> "what?" #=> omg! what?
+  #
+  class Inspector
+    # Default inspectors available to irb, this includes:
+    #
+    # +:pp+::       Using Kernel#pretty_inspect
+    # +:yaml+::     Using YAML.dump
+    # +:marshal+::  Using Marshal.dump
+    INSPECTORS = {}
+
+    # Determines the inspector to use where +inspector+ is one of the keys passed
+    # during inspector definition.
+    def self.keys_with_inspector(inspector)
+      INSPECTORS.select{|k,v| v == inspector}.collect{|k, v| k}
+    end
+
+    # Example
+    #
+    #     Inspector.def_inspector(key, init_p=nil){|v| v.inspect}
+    #     Inspector.def_inspector([key1,..], init_p=nil){|v| v.inspect}
+    #     Inspector.def_inspector(key, inspector)
+    #     Inspector.def_inspector([key1,...], inspector)
+    def self.def_inspector(key, arg=nil, &block)
+      if block_given?
+        inspector = IRB::Inspector(block, arg)
+      else
+        inspector = arg
+      end
+
+      case key
+      when Array
+        for k in key
+          def_inspector(k, inspector)
+        end
+      when Symbol
+        INSPECTORS[key] = inspector
+        INSPECTORS[key.to_s] = inspector
+      when String
+        INSPECTORS[key] = inspector
+        INSPECTORS[key.intern] = inspector
+      else
+        INSPECTORS[key] = inspector
+      end
+    end
+
+    # Creates a new inspector object, using the given +inspect_proc+ when
+    # output return values in irb.
+    def initialize(inspect_proc, init_proc = nil)
+      @init = init_proc
+      @inspect = inspect_proc
+    end
+
+    # Proc to call when the inspector is activated, good for requiring
+    # dependent libraries.
+    def init
+      @init.call if @init
+    end
+
+    # Proc to call when the input is evaluated and output in irb.
+    def inspect_value(v)
+      @inspect.call(v)
+    end
+  end
+
+  Inspector.def_inspector([false, :to_s, :raw]){|v| v.to_s}
+  Inspector.def_inspector([true, :p, :inspect]){|v|
+    begin
+      v.inspect
+    rescue NoMethodError
+      puts "(Object doesn't support #inspect)"
+    end
+  }
+  Inspector.def_inspector([:pp, :pretty_inspect], proc{require "pp"}){|v| v.pretty_inspect.chomp}
+  Inspector.def_inspector([:yaml, :YAML], proc{require "yaml"}){|v|
+    begin
+      YAML.dump(v)
+    rescue
+      puts "(can't dump yaml. use inspect)"
+      v.inspect
+    end
+  }
+
+  Inspector.def_inspector([:marshal, :Marshal, :MARSHAL, Marshal]){|v|
+    Marshal.dump(v)
+  }
+end
+
+
+
+
+