components/policy/core/common/proxy_policy_provider.cc

   1 // Copyright 2014 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 #include "components/policy/core/common/proxy_policy_provider.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "components/policy/core/common/policy_bundle.h"
  10
  11 namespace policy {
  12
  13 ProxyPolicyProvider::ProxyPolicyProvider() : delegate_(NULL) {}
  14
  15 ProxyPolicyProvider::~ProxyPolicyProvider() {
  16   DCHECK(!delegate_);
  17 }
  18
  19 void ProxyPolicyProvider::SetDelegate(ConfigurationPolicyProvider* delegate) {
  20   if (delegate_)
  21     delegate_->RemoveObserver(this);
  22   delegate_ = delegate;
  23   if (delegate_) {
  24     delegate_->AddObserver(this);
  25     OnUpdatePolicy(delegate_);
  26   } else {
  27     UpdatePolicy(scoped_ptr<PolicyBundle>(new PolicyBundle()));
  28   }
  29 }
  30
  31 void ProxyPolicyProvider::Shutdown() {
  32   // Note: the delegate is not owned by the proxy provider, so this call is not
  33   // forwarded. The same applies for the Init() call.
  34   // Just drop the delegate without propagating updates here.
  35   if (delegate_) {
  36     delegate_->RemoveObserver(this);
  37     delegate_ = NULL;
  38   }
  39   ConfigurationPolicyProvider::Shutdown();
  40 }
  41
  42 void ProxyPolicyProvider::RefreshPolicies() {
  43   if (delegate_) {
  44     delegate_->RefreshPolicies();
  45   } else {
  46     // Subtle: if a RefreshPolicies() call comes after Shutdown() then the
  47     // current bundle should be served instead. This also does the right thing
  48     // if SetDelegate() was never called before.
  49     scoped_ptr<PolicyBundle> bundle(new PolicyBundle());
  50     bundle->CopyFrom(policies());
  51     UpdatePolicy(bundle.Pass());
  52   }
  53 }
  54
  55 void ProxyPolicyProvider::OnUpdatePolicy(
  56     ConfigurationPolicyProvider* provider) {
  57   DCHECK_EQ(delegate_, provider);
  58   scoped_ptr<PolicyBundle> bundle(new PolicyBundle());
  59   bundle->CopyFrom(delegate_->policies());
  60   UpdatePolicy(bundle.Pass());
  61 }
  62
  63 }  // namespace policy