* changed the method IndexSearcher#initialize to only use hashes

* added IndexSearcher#search for strings only

lib/polecat/index_searcher.rb

@@ -5,6 +5,7 @@ class Polecat
   # all documents stored in an index.
   class IndexSearcher
     attr_reader :reader
+    attr_reader :default_field
 
     # creates a new Polecat::IndexSearcher
     #
@@ -15,12 +16,16 @@ class Polecat
     #   # the following has the same meaning
     #   IndexSearcher.new 'index_dir'
     #   IndexSearcher.new(IndexReader.new 'index_dir')
-    def initialize *args
-      first = args[0]
-      if first.class == Polecat::IndexReader
-        @reader = first
-      elsif first.class == String
-        @reader = Polecat::IndexReader.new first
+    def initialize options
+      if options.has_key? :path
+        @reader = Polecat::IndexReader.new(options[:path])
+      elsif options.has_key? :reader 
+        @reader = options[:reader]
+        raise ArgumentError, 'no reader' unless @reader.kind_of?(Polecat::IndexReader)
+      end
+
+      if options.has_key? :default_field
+        @default_field = options[:default_field]
       end
     end
 
@@ -29,5 +34,13 @@ class Polecat
     def path
       @reader.path
     end
+
+    def search query
+      result = []
+      @reader.read.each do |doc|
+        result << doc if doc.attributes[@default_field].equals?(query)
+      end
+      result
+    end
   end
 end

spec/index_searcher/new_spec.rb

@@ -5,13 +5,23 @@ describe "IndexSearcher#new" do
     @path = prepare_index_dir
   end
 
-  it "takes a path as an arugment" do
-    s = Polecat::IndexSearcher.new @path
-    s.path.should == @path
+  it "takes a hash with options as an argument" do
+    s = Polecat::IndexSearcher.new(
+      :path          => @path,
+      :default_field => :description
+    )
+    s.path.should          == @path
+    s.default_field.should == :description
   end
 
-  it "takes an IndexReader as an argument" do
-    s = Polecat::IndexSearcher.new(Polecat::IndexReader.new @path)
-    s.path.should == @path
+  it "takes a reader in the options" do
+    r = Polecat::IndexReader.new(@path)
+    s = Polecat::IndexSearcher.new :reader => r
+    s.reader.should == r
+  end
+
+  it "raises an error, when the reader is not an IndexReader" do
+    lambda { Polecat::IndexSearcher.new(:reader => "foo") }.should(
+      raise_error(ArgumentError))
   end
 end

spec/index_searcher/search_spec.rb

@@ -0,0 +1,10 @@
+require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')
+
+describe "IndexSearcher#search" do
+  let(:path) { prepare_index_dir }
+  let(:s) { Polecat::IndexSearcher.new :path => path }
+
+  it "takes a string as an argument" do
+    s.search("foo").should == []
+  end
+end