From e7a29380292902eae4799b2658507b3cfffb9cec Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Fri, 18 Feb 2005 10:35:25 +0000
Subject: Added Action Service to the repository

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@658 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 .../lib/action_service/support/signature.rb        | 100 +++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 actionservice/lib/action_service/support/signature.rb

(limited to 'actionservice/lib/action_service/support/signature.rb')

diff --git a/actionservice/lib/action_service/support/signature.rb b/actionservice/lib/action_service/support/signature.rb
new file mode 100644
index 0000000000..f7aae61a3f
--- /dev/null
+++ b/actionservice/lib/action_service/support/signature.rb
@@ -0,0 +1,100 @@
+module ActionService # :nodoc:
+  # Action Service parameter type specifiers may contain symbols or strings
+  # instead of Class objects, for a limited set of base types.
+  #
+  # This provides an unambiguous way to specify that a given parameter
+  # contains an integer or boolean value, for example.
+  #
+  # The allowed set of symbol/string aliases:
+  #
+  # [<tt>:int</tt>]     any integer value
+  # [<tt>:float</tt>]   any floating point value
+  # [<tt>:string</tt>]  any string value
+  # [<tt>:bool</tt>]    any boolean value
+  # [<tt>:time</tt>]    any value containing both date and time
+  # [<tt>:date</tt>]    any value containing only a date
+  module Signature
+    class SignatureError < StandardError # :nodoc:
+    end
+
+    private
+      def canonical_signature(params)
+        return nil if params.nil?
+        params.map do |param|
+          klass = signature_parameter_class(param)
+          if param.is_a?(Hash)
+            param[param.keys[0]] = klass
+            param
+          else
+            klass
+          end
+        end
+      end
+  
+      def signature_parameter_class(param)
+        param = param.is_a?(Hash) ? param.values[0] : param
+        is_array = param.is_a?(Array)
+        param = is_array ? param[0] : param
+        param = param.is_a?(String) ? param.to_sym : param
+        param = param.is_a?(Symbol) ? signature_ruby_class(param) : param
+        is_array ? [param] : param
+      end
+  
+  
+      def canonical_signature_base_type(base_type)
+        base_type = base_type.to_sym
+        case base_type
+          when :int, :integer, :fixnum, :bignum
+            :int
+          when :string, :base64
+            :string
+          when :bool, :boolean
+            :bool
+          when :float, :double
+            :float
+          when :time, :datetime, :timestamp
+            :time
+          when :date
+            :date
+          else
+            raise(SignatureError, ":#{base_type} is not an ActionService base type")
+        end
+      end
+  
+      def signature_ruby_class(base_type)
+        case canonical_signature_base_type(base_type)
+        when :int
+          Integer
+        when :string
+          String
+        when :bool
+          TrueClass
+        when :float
+          Float
+        when :time
+          Time
+        when :date
+          Date
+        end
+      end
+  
+      def signature_base_type(ruby_class)
+        case ruby_class
+        when Bignum, Integer, Fixnum
+          :int
+        when String
+          :string
+        when TrueClass, FalseClass
+          :bool
+        when Float, Numeric, Precision
+          :float
+        when Time, DateTime
+          :time
+        when Date
+          :date
+        else
+          raise(SignatureError, "#{ruby_class.name} is not an ActionService base type")
+        end
+      end
+  end
+end
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