it is now building a small block out of the term parameters

lib/polecat/index_searcher.rb

@@ -42,12 +42,12 @@ module Polecat
     # @param [String] query a String which get's matched against the documents
     # @return [Array] a list of all matching documents
     def search query
-      @reader.read.select do |doc|
+      @content = @reader.read if @content.nil?
+      @content.select do |doc|
         #doc.attributes.fetch(@default_field).fetch(:value) == query
         rs = []
         query.terms.each do |term|
-          val = doc.send(term.field.to_sym)
-          if compare val, term.operator, term.value
+          if term.compare(doc.send(term.field))
             rs << true
           end
         end
@@ -58,27 +58,5 @@ module Polecat
         end
       end
     end
-
-    # compare the document value with the searched value
-    #
-    # This compares the two values with the operator
-    # @return [Any] trueish for matches or falsey
-    # @private
-    def compare ival, op, tval
-      if op == :eq
-        if tval.class == Regexp
-          ival.match tval
-        else
-          ival == tval
-        end
-      elsif op == :gt
-        ival < tval
-      elsif op == :lt
-        ival > tval
-      else
-        false
-      end
-    end
-    private :compare
   end
 end

lib/polecat/term.rb

@@ -12,10 +12,30 @@ module Polecat
       @field = field
       @operator = operator
       if @operator == :eq && value.class == String
-        @value = /^#{value}$/
+        value = /^#{value}$/
       else
-        @value = value
+        value = value
       end
+      @value = value
+
+      method_string = 'def compare(inval);'
+      if value.class == Regexp
+        if operator == :eq
+          method_string += "  inval.match(@value);"
+        else
+          raise ArgumentError, "operation #{operator} does not work with a regexp"
+        end
+      else
+        if operator == :eq
+          method_string += "  inval == @value;"
+        elsif operator == :lt
+          method_string += "  inval < @value;"
+        elsif operator == :gt
+          method_string += "  inval > @value;"
+        end
+      end
+      method_string += 'end;'
+      self.instance_eval method_string
     end
   end
 end

spec/term/new_spec.rb

@@ -13,6 +13,17 @@ describe "Term#new" do
     t.value.should == /^foo$/
   end
 
+  it "creates a method #compare with one argument after initialization" do
+    t = Polecat::Term.new :name, :eq, "foo"
+    t.respond_to?(:compare).should == true
+    t.method(:compare).arity.should == 1
+  end
+
+  it "raises an error if a regexp shall be compared for larger or minor" do
+    lambda { Polecat::Term.new(:name, :lt, /foo/) }.should(
+      raise_error(ArgumentError))
+  end
+
   it "raises an error if no argument is given" do
     lambda { Polecat::Term.new }.should raise_error
   end