impl/memory: Implement Queries

service/datastore/index.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package datastore
 
 import (
         "bytes"
 )
 
@@ skipping 21 matching lines @@
         }
         return cmpString(i.Property, o.Property)()
 }
 
 type IndexDefinition struct {
         Kind     string
         Ancestor bool
         SortBy   []IndexColumn
 }
 
+func (id *IndexDefinition) Equal(o *IndexDefinition) bool {
+        if id.Kind != o.Kind || id.Ancestor != o.Ancestor || len(id.SortBy) != len(o.SortBy) {
+                return false
+        }
+        for i, col := range id.SortBy {
+                if col != o.SortBy[i] {
+                        return false
+                }
+        }
+        return true
+}
+
 // Yeah who needs templates, right?
 // <flames>This is fine.</flames>
 
 func cmpBool(a, b bool) func() int {
         return func() int {
                 if a == b {
                         return 0
                 }
                 if a && !b { // >
                         return 1
@@ skipping 96 matching lines @@
         return ret.String()
 }
 
 func IndexBuiltinQueryPrefix() []byte {
         return []byte{0}
 }
 
 func IndexComplexQueryPrefix() []byte {
         return []byte{1}
 }