Implementation of managed policy: Policy Abstraction

chrome/browser/configuration_policy_pref_store.h

+// Copyright (c) 2010 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.
+
+#ifndef CHROME_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_
+#define CHROME_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "base/values.h"
+#include "chrome/browser/configuration_policy_store.h"
+#include "chrome/browser/pref_store.h"
+#include "testing/gtest/include/gtest/gtest_prod.h"
+
+class ConfigurationPolicyProvider;
+
+// An implementation of the |PrefStore| that holds a Dictionary
+// created through applied policy.
+class ConfigurationPolicyPrefStore : public PrefStore,
+                                     public ConfigurationPolicyStore {
+ public:
+  explicit ConfigurationPolicyPrefStore(ConfigurationPolicyProvider* provider);
+  virtual ~ConfigurationPolicyPrefStore() { }
+
+  // PrefStore methods:
+  virtual PrefReadError ReadPrefs();
+  virtual DictionaryValue* prefs() { return prefs_.get(); }
+
+ private:
+  // For unit tests.
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest, TestSettingHomePageDefault);
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest, TestSettingHomePageOverride);
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest,
+              TestSettingHomepageIsNewTabPageDefault);
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest,
+              TestSettingHomepageIsNewTabPage);
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest,
+              TestSettingCookiesEnabledDefault);
+  FRIEND_TEST(ConfigurationPolicyPrefStoreTest,
+              TestSettingCookiesEnabledOverride);
+
+  // Policies that map to a single preference are handled
+  // by an automated converter. Each one of these policies
+  // has an entry in |simple_policy_map_| with the following type.
+  struct PolicyToPreferenceMapEntry {
+    Value::ValueType value_type;
+    PolicyType policy_type;
+    const wchar_t* preference_path;  // A DictionaryValue path, not a file path.
+  };
+
+  static const PolicyToPreferenceMapEntry simple_policy_map_[];
+
+  ConfigurationPolicyProvider* provider_;
+  scoped_ptr<DictionaryValue> prefs_;
+
+  // ConfigurationPolicyStore methods:
+  virtual void Apply(PolicyType setting, Value* value);
+
+  DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyPrefStore);
+};
+
+#endif  // CHROME_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_
+