Merge pull request #7 from pangloss/fast_parser

Fast parser

lib/pacer/filter.rb

@@ -5,7 +5,6 @@ module Filter
 
 require 'pacer/filter/collection_filter'
 require 'pacer/filter/empty_filter'
-require 'pacer/filter/expression_filter'
 require 'pacer/filter/future_filter'
 require 'pacer/filter/property_filter'
 require 'pacer/filter/range_filter'
@@ -14,3 +13,4 @@ module Filter
 require 'pacer/filter/loop_filter'
 require 'pacer/filter/block_filter'
 require 'pacer/filter/object_filter'
+require 'pacer/filter/where_filter'

lib/pacer/filter/where_filter.rb

@@ -0,0 +1,47 @@
+require 'pacer/filter/where_filter/node_visitor'
+
+module Pacer
+  module Routes
+    module RouteOperations
+      def where(str, values = {})
+        chain_route :filter => :where, :where_statement => str, :values => values
+      end
+    end
+  end
+
+  module Filter
+    module WhereFilter
+      attr_reader :where_statement
+      attr_accessor :values
+
+      def where_statement=(str)
+        @where_statement = str
+        @built = @parsed = @intermediate = nil
+      end
+
+      def parsed
+        @parsed ||= JRuby.parse @where_statement
+      end
+
+      def intermediate
+        @intermediate ||= parsed.accept(NodeVisitor.new(self, values || {}))
+      end
+
+      def build!
+        @built ||= intermediate.build
+      end
+
+      protected
+
+      def attach_pipe(end_pipe)
+        pipe = build!
+        pipe.setStarts end_pipe if end_pipe
+        pipe
+      end
+
+      def inspect_string
+        "where(#@where_statement)"
+      end
+    end
+  end
+end