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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_BROWSER_POLICY_FORWARDING_POLICY_PROVIDER_H_ | |
6 #define CHROME_BROWSER_POLICY_FORWARDING_POLICY_PROVIDER_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/compiler_specific.h" | |
10 #include "components/policy/core/common/configuration_policy_provider.h" | |
11 #include "components/policy/core/common/policy_namespace.h" | |
12 | |
13 namespace policy { | |
14 | |
15 // A policy provider that forwards calls to another provider. | |
16 // This provider also tracks the SchemaRegistry, and becomes ready after making | |
17 // sure the delegate provider has refreshed its policies with an updated view | |
18 // of the complete schema. It is expected that the delegate's SchemaRegistry | |
19 // is a CombinedSchemaRegistry tracking the forwarding provider's registry. | |
20 class ForwardingPolicyProvider : public ConfigurationPolicyProvider, | |
21 public ConfigurationPolicyProvider::Observer { | |
22 public: | |
23 // The |delegate| must outlive this provider. | |
24 explicit ForwardingPolicyProvider(ConfigurationPolicyProvider* delegate); | |
25 virtual ~ForwardingPolicyProvider(); | |
26 | |
27 // ConfigurationPolicyProvider: | |
28 // | |
29 // Note that Init() and Shutdown() are not forwarded to the |delegate_|, since | |
30 // this provider does not own it and its up to the |delegate_|'s owner to | |
31 // initialize it and shut it down. | |
32 // | |
33 // Note also that this provider may have a SchemaRegistry passed in Init() | |
34 // that doesn't match the |delegate_|'s; therefore OnSchemaRegistryUpdated() | |
35 // and OnSchemaRegistryReady() are not forwarded either. It is assumed that | |
36 // the |delegate_|'s SchemaRegistry contains a superset of this provider's | |
37 // SchemaRegistry though (i.e. it's a CombinedSchemaRegistry that contains | |
38 // this provider's SchemaRegistry). | |
39 // | |
40 // This provider manages its own initialization state for all policy domains | |
41 // except POLICY_DOMAIN_CHROME, whose status is always queried from the | |
42 // |delegate_|. RefreshPolicies() calls are also forwarded, since this | |
43 // provider doesn't have a "real" policy source of its own. | |
44 virtual void Init(SchemaRegistry* registry) OVERRIDE; | |
45 virtual bool IsInitializationComplete(PolicyDomain domain) const OVERRIDE; | |
46 virtual void RefreshPolicies() OVERRIDE; | |
47 virtual void OnSchemaRegistryReady() OVERRIDE; | |
48 virtual void OnSchemaRegistryUpdated(bool has_new_schemas) OVERRIDE; | |
49 | |
50 // ConfigurationPolicyProvider::Observer: | |
51 virtual void OnUpdatePolicy(ConfigurationPolicyProvider* provider) OVERRIDE; | |
52 | |
53 private: | |
54 enum InitializationState { | |
55 WAITING_FOR_REGISTRY_READY, | |
56 WAITING_FOR_REFRESH, | |
57 READY, | |
58 }; | |
59 | |
60 ConfigurationPolicyProvider* delegate_; | |
61 InitializationState state_; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(ForwardingPolicyProvider); | |
64 }; | |
65 | |
66 } // namespace policy | |
67 | |
68 #endif // CHROME_BROWSER_POLICY_FORWARDING_POLICY_PROVIDER_H_ | |
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