algebra.rb in shex-0.3.0

- old
+ new

@@ -7,19 +7,17 @@
   #
   # @author [Gregg Kellogg](http://greggkellogg.net/)
   module Algebra
     autoload :And, 'shex/algebra/and'
     autoload :Annotation, 'shex/algebra/annotation'
-    autoload :Base, 'shex/algebra/base'
     autoload :EachOf, 'shex/algebra/each_of'
     autoload :Inclusion, 'shex/algebra/inclusion'
     autoload :Not, 'shex/algebra/not'
     autoload :NodeConstraint, 'shex/algebra/node_constraint'
     autoload :OneOf, 'shex/algebra/one_of'
     autoload :Operator, 'shex/algebra/operator'
     autoload :Or, 'shex/algebra/or'
-    autoload :Prefix, 'shex/algebra/prefix'
     autoload :Satisfiable, 'shex/algebra/satisfiable'
     autoload :Schema, 'shex/algebra/schema'
     autoload :SemAct, 'shex/algebra/semact'
     autoload :External, 'shex/algebra/external'
     autoload :ShapeRef, 'shex/algebra/shape_ref'
@@ -27,11 +25,51 @@
     autoload :Start, 'shex/algebra/start'
     autoload :Stem, 'shex/algebra/stem'
     autoload :StemRange, 'shex/algebra/stem_range'
     autoload :TripleConstraint, 'shex/algebra/triple_constraint'
     autoload :TripleExpression, 'shex/algebra/triple_expression'
-    autoload :UnaryShape, 'shex/algebra/unary_shape'
     autoload :Value, 'shex/algebra/value'
+
+
+    ##
+    # Creates an operator instance from a parsed ShExJ representation
+    #
+    # @example Simple TripleConstraint
+    #   rep = JSON.parse(%({
+    #           "type": "TripleConstraint",
+    #           "predicate": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"
+    #         }
+    #   ))
+    #   TripleConstraint.from(rep) #=> (tripleConstraint a)
+    # @param [Hash] operator
+    # @param [Hash] options ({})
+    # @option options [RDF::URI] :base
+    # @option options [Hash{String => RDF::URI}] :prefixes
+    # @return [Operator]
+    def self.from_shexj(operator, options = {})
+      raise ArgumentError unless operator.is_a?(Hash)
+      klass = case operator['type']
+      when 'Annotation'       then Annotation
+      when 'EachOf'           then EachOf
+      when 'Inclusion'        then Inclusion
+      when 'NodeConstraint'   then NodeConstraint
+      when 'OneOf'            then OneOf
+      when 'Schema'           then Schema
+      when 'SemAct'           then SemAct
+      when 'Shape'            then Shape
+      when 'ShapeAnd'         then And
+      when 'ShapeNot'         then Not
+      when 'ShapeOr'          then Or
+      when 'ShapeRef'         then ShapeRef
+      when 'Stem'             then Stem
+      when 'StemRange'        then StemRange
+      when 'TripleConstraint' then TripleConstraint
+      when 'Wildcard'         then StemRange
+      else raise ArgumentError, "unknown type #{operator['type']}"
+      end
+
+      klass.from_shexj(operator, options)
+    end
   end
 end
 
 