136 lines
5.2 KiB
Ruby
136 lines
5.2 KiB
Ruby
require 'time'
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require 'date'
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require 'xmlrpc/datetime'
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module ActionWebService # :nodoc:
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module Casting # :nodoc:
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class CastingError < ActionWebServiceError # :nodoc:
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end
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# Performs casting of arbitrary values into the correct types for the signature
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class BaseCaster # :nodoc:
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def initialize(api_method)
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@api_method = api_method
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end
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# Coerces the parameters in +params+ (an Enumerable) into the types
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# this method expects
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def cast_expects(params)
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self.class.cast_expects(@api_method, params)
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end
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# Coerces the given +return_value+ into the type returned by this
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# method
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def cast_returns(return_value)
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self.class.cast_returns(@api_method, return_value)
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end
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class << self
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include ActionWebService::SignatureTypes
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def cast_expects(api_method, params) # :nodoc:
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return [] if api_method.expects.nil?
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api_method.expects.zip(params).map{ |type, param| cast(param, type) }
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end
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def cast_returns(api_method, return_value) # :nodoc:
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return nil if api_method.returns.nil?
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cast(return_value, api_method.returns[0])
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end
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def cast(value, signature_type) # :nodoc:
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return value if signature_type.nil? # signature.length != params.length
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return nil if value.nil?
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# XMLRPC protocol doesn't support nil values. It uses false instead.
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# It should never happen for SOAP.
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if signature_type.structured? && value.equal?(false)
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return nil
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end
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unless signature_type.array? || signature_type.structured?
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return value if canonical_type(value.class) == signature_type.type
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end
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if signature_type.array?
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unless value.respond_to?(:entries) && !value.is_a?(String)
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raise CastingError, "Don't know how to cast #{value.class} into #{signature_type.type.inspect}"
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end
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value.entries.map do |entry|
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cast(entry, signature_type.element_type)
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end
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elsif signature_type.structured?
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cast_to_structured_type(value, signature_type)
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elsif !signature_type.custom?
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cast_base_type(value, signature_type)
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end
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end
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def cast_base_type(value, signature_type) # :nodoc:
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# This is a work-around for the fact that XML-RPC special-cases DateTime values into its own DateTime type
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# in order to support iso8601 dates. This doesn't work too well for us, so we'll convert it into a Time,
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# with the caveat that we won't be able to handle pre-1970 dates that are sent to us.
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#
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# See http://dev.rubyonrails.com/ticket/2516
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value = value.to_time if value.is_a?(XMLRPC::DateTime)
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case signature_type.type
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when :int
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Integer(value)
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when :string
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value.to_s
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when :base64
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if value.is_a?(ActionWebService::Base64)
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value
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else
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ActionWebService::Base64.new(value.to_s)
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end
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when :bool
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return false if value.nil?
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return value if value == true || value == false
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case value.to_s.downcase
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when '1', 'true', 'y', 'yes'
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true
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when '0', 'false', 'n', 'no'
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false
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else
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raise CastingError, "Don't know how to cast #{value.class} into Boolean"
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end
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when :float
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Float(value)
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when :time
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value = "%s/%s/%s %s:%s:%s" % value.values_at(*%w[2 3 1 4 5 6]) if value.kind_of?(Hash)
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value.kind_of?(Time) ? value : Time.parse(value.to_s)
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when :date
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value = "%s/%s/%s" % value.values_at(*%w[2 3 1]) if value.kind_of?(Hash)
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value.kind_of?(Date) ? value : Date.parse(value.to_s)
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when :datetime
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value = "%s/%s/%s %s:%s:%s" % value.values_at(*%w[2 3 1 4 5 6]) if value.kind_of?(Hash)
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value.kind_of?(DateTime) ? value : DateTime.parse(value.to_s)
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end
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end
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def cast_to_structured_type(value, signature_type) # :nodoc:
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obj = nil
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obj = value if canonical_type(value.class) == canonical_type(signature_type.type)
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obj ||= signature_type.type_class.new
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if value.respond_to?(:each_pair)
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klass = signature_type.type_class
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value.each_pair do |name, val|
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type = klass.respond_to?(:member_type) ? klass.member_type(name) : nil
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val = cast(val, type) if type
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# See http://dev.rubyonrails.com/ticket/3567
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val = val.to_time if val.is_a?(XMLRPC::DateTime)
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obj.__send__("#{name}=", val) if obj.respond_to?(name)
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end
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elsif value.respond_to?(:attributes)
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signature_type.each_member do |name, type|
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val = value.__send__(name)
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obj.__send__("#{name}=", cast(val, type)) if obj.respond_to?(name)
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end
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else
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raise CastingError, "Don't know how to cast #{value.class} to #{signature_type.type_class}"
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end
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obj
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end
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end
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end
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end
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end
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