Move PolicySchema and PolicySchemaRegistry to components/policy/.

chrome/browser/policy/schema_registry.cc

-// Copyright 2013 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.
-
-#include "chrome/browser/policy/schema_registry.h"
-
-#include "base/logging.h"
-
-namespace policy {
-
-SchemaRegistry::Observer::~Observer() {}
-
-SchemaRegistry::SchemaRegistry() : schema_map_(new SchemaMap) {
-  for (int i = 0; i < POLICY_DOMAIN_SIZE; ++i)
-    domains_ready_[i] = false;
-#if !defined(ENABLE_EXTENSIONS)
-  domains_ready_[POLICY_DOMAIN_EXTENSIONS] = true;
-#endif
-}
-
-SchemaRegistry::~SchemaRegistry() {}
-
-void SchemaRegistry::RegisterComponent(const PolicyNamespace& ns,
-                                       const Schema& schema) {
-  ComponentMap map;
-  map[ns.component_id] = schema;
-  RegisterComponents(ns.domain, map);
-}
-
-void SchemaRegistry::RegisterComponents(PolicyDomain domain,
-                                        const ComponentMap& components) {
-  // Assume that a schema was updated if the namespace was already registered
-  // before.
-  DomainMap map(schema_map_->GetDomains());
-  for (ComponentMap::const_iterator it = components.begin();
-       it != components.end(); ++it) {
-    map[domain][it->first] = it->second;
-  }
-  schema_map_ = new SchemaMap(map);
-  Notify(true);
-}
-
-void SchemaRegistry::UnregisterComponent(const PolicyNamespace& ns) {
-  DomainMap map(schema_map_->GetDomains());
-  if (map[ns.domain].erase(ns.component_id) != 0) {
-    schema_map_ = new SchemaMap(map);
-    Notify(false);
-  } else {
-    NOTREACHED();
-  }
-}
-
-bool SchemaRegistry::IsReady() const {
-  for (int i = 0; i < POLICY_DOMAIN_SIZE; ++i) {
-    if (!domains_ready_[i])
-      return false;
-  }
-  return true;
-}
-
-void SchemaRegistry::SetReady(PolicyDomain domain) {
-  if (domains_ready_[domain])
-    return;
-  domains_ready_[domain] = true;
-  if (IsReady())
-    FOR_EACH_OBSERVER(Observer, observers_, OnSchemaRegistryReady());
-}
-
-void SchemaRegistry::AddObserver(Observer* observer) {
-  observers_.AddObserver(observer);
-}
-
-void SchemaRegistry::RemoveObserver(Observer* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-void SchemaRegistry::Notify(bool has_new_schemas) {
-  FOR_EACH_OBSERVER(
-      Observer, observers_, OnSchemaRegistryUpdated(has_new_schemas));
-}
-
-bool SchemaRegistry::HasObservers() const {
-  return observers_.might_have_observers();
-}
-
-CombinedSchemaRegistry::CombinedSchemaRegistry()
-    : own_schema_map_(new SchemaMap) {
-  // The combined registry is always ready, since it can always start tracking
-  // another registry that is not ready yet and going from "ready" to "not
-  // ready" is not allowed.
-  for (int i = 0; i < POLICY_DOMAIN_SIZE; ++i)
-    SetReady(static_cast<PolicyDomain>(i));
-}
-
-CombinedSchemaRegistry::~CombinedSchemaRegistry() {}
-
-void CombinedSchemaRegistry::Track(SchemaRegistry* registry) {
-  registries_.insert(registry);
-  registry->AddObserver(this);
-  // Recombine the maps only if the |registry| has any components other than
-  // POLICY_DOMAIN_CHROME.
-  if (registry->schema_map()->HasComponents())
-    Combine(true);
-}
-
-void CombinedSchemaRegistry::Untrack(SchemaRegistry* registry) {
-  registry->RemoveObserver(this);
-  if (registries_.erase(registry) != 0) {
-    if (registry->schema_map()->HasComponents())
-      Combine(false);
-  } else {
-    NOTREACHED();
-  }
-}
-
-void CombinedSchemaRegistry::RegisterComponents(
-    PolicyDomain domain,
-    const ComponentMap& components) {
-  DomainMap map(own_schema_map_->GetDomains());
-  for (ComponentMap::const_iterator it = components.begin();
-       it != components.end(); ++it) {
-    map[domain][it->first] = it->second;
-  }
-  own_schema_map_ = new SchemaMap(map);
-  Combine(true);
-}
-
-void CombinedSchemaRegistry::UnregisterComponent(const PolicyNamespace& ns) {
-  DomainMap map(own_schema_map_->GetDomains());
-  if (map[ns.domain].erase(ns.component_id) != 0) {
-    own_schema_map_ = new SchemaMap(map);
-    Combine(false);
-  } else {
-    NOTREACHED();
-  }
-}
-
-void CombinedSchemaRegistry::OnSchemaRegistryUpdated(bool has_new_schemas) {
-  Combine(has_new_schemas);
-}
-
-void CombinedSchemaRegistry::OnSchemaRegistryReady() {
-  // Ignore.
-}
-
-void CombinedSchemaRegistry::Combine(bool has_new_schemas) {
-  // If two registries publish a Schema for the same component then it's
-  // undefined which version gets in the combined registry.
-  //
-  // The common case is that both registries want policy for the same component,
-  // and the Schemas should be the same; in that case this makes no difference.
-  //
-  // But if the Schemas are different then one of the components is out of date.
-  // In that case the policy loaded will be valid only for one of them, until
-  // the outdated components are updated. This is a known limitation of the
-  // way policies are loaded currently, but isn't a problem worth fixing for
-  // the time being.
-  DomainMap map(own_schema_map_->GetDomains());
-  for (std::set<SchemaRegistry*>::const_iterator reg_it = registries_.begin();
-       reg_it != registries_.end(); ++reg_it) {
-    const DomainMap& reg_domain_map = (*reg_it)->schema_map()->GetDomains();
-    for (DomainMap::const_iterator domain_it = reg_domain_map.begin();
-         domain_it != reg_domain_map.end(); ++domain_it) {
-      const ComponentMap& reg_component_map = domain_it->second;
-      for (ComponentMap::const_iterator comp_it = reg_component_map.begin();
-           comp_it != reg_component_map.end(); ++comp_it) {
-        map[domain_it->first][comp_it->first] = comp_it->second;
-      }
-    }
-  }
-  schema_map_ = new SchemaMap(map);
-  Notify(has_new_schemas);
-}
-
-}  // namespace policy