added list gethandle operation

index/commands.go

@@ -170,3 +170,21 @@ func (self *CmdEmpty) Execute(f *Fragment) Calculation {
 	result := NewBitmap()
 	return f.AllocHandle(result)
 }
+
+type CmdGetList struct {
+	*Responder
+	bitmap_ids []uint64
+}
+
+func NewGetList(bitmap_ids []uint64) *CmdGetList {
+	return &CmdGetList{NewResponder("GetList"), bitmap_ids}
+}
+
+func (self *CmdGetList) Execute(f *Fragment) Calculation {
+	ret := make([]BitmapHandle, len(self.bitmap_ids))
+	for i, v := range self.bitmap_ids {
+		ret[i] = f.NewHandle(v)
+	}
+
+	return ret
+}

index/fragment_container.go

@@ -58,6 +58,16 @@ func (self *FragmentContainer) Get(frag_id SUUID, bitmap_id uint64) (BitmapHandl
 	}
 	return 0, errors.New("Invalid Bitmap Handle")
 }
+
+func (self *FragmentContainer) GetList(frag_id SUUID, bitmap_id []uint64) ([]BitmapHandle, error) {
+	if fragment, found := self.GetFragment(frag_id); found {
+		request := NewGetList(bitmap_id)
+		fragment.requestChan <- request
+		return request.Response().answer.([]BitmapHandle), nil
+	}
+	return nil, errors.New("Invalid Bitmap Handle")
+}
+
 func (self *FragmentContainer) Count(frag_id SUUID, bitmap BitmapHandle) (uint64, error) {
 	if fragment, found := self.GetFragment(frag_id); found {
 		request := NewCount(bitmap)

index/fragment_container_test.go

@@ -68,4 +68,11 @@ func TestServer(t *testing.T) {
 		before, _ := dummy.Count(id, bh)
 		So(before, ShouldEqual, 0)
 	})
+
+	Convey("GetList ", t, func() {
+		bhs, _ := dummy.GetList(id, []uint64{1234, 4321, 789})
+		result, _ := dummy.Union(id, bhs)
+		num, _ := dummy.Count(id, result)
+		So(num, ShouldNotEqual, 2)
+	})
 }