Added a SchemaMap.

chrome/browser/policy/schema_map.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_map.h"
+
+#include "base/values.h"
+#include "chrome/browser/policy/policy_bundle.h"
+#include "chrome/browser/policy/policy_map.h"
+#include "components/policy/core/common/schema.h"
+
+namespace policy {
+
+SchemaMap::SchemaMap() {}
+
+SchemaMap::SchemaMap(DomainMap& map) {
+  map_.swap(map);
+}
+
+SchemaMap::~SchemaMap() {}
+
+const DomainMap& SchemaMap::GetDomains() const {
+  return map_;
+}
+
+const ComponentMap& SchemaMap::GetComponents(PolicyDomain domain) const {
+  DomainMap::const_iterator it = map_.find(domain);
+  return it == map_.end() ? kEmptyComponentMap_ : it->second;
+}
+
+const Schema* SchemaMap::GetSchema(PolicyDomain domain,
+                                   const std::string& component_id) const {
+  const ComponentMap& map = GetComponents(domain);
+  ComponentMap::const_iterator it = map.find(component_id);
+  return it == map.end() ? NULL : &it->second;
+}
+
+const Schema* SchemaMap::GetSchema(const PolicyNamespace& ns) const {
+  return GetSchema(ns.domain, ns.component_id);
+}
+
+void SchemaMap::FilterBundle(PolicyBundle* bundle) const {
+  for (PolicyBundle::iterator it = bundle->begin(); it != bundle->end(); ++it) {
+    // Chrome policies are not filtered, so that typos appear in about:policy.
+    // Everything else gets filtered, so that components only see valid policy.
+    if (it->first.domain == POLICY_DOMAIN_CHROME)
+      continue;
+
+    const Schema* schema = GetSchema(it->first);
+
+    if (!schema) {
+      it->second->Clear();
+      continue;
+    }
+
+    // TODO(joaodasilva): if a component is registered but doesn't have a schema
+    // then its policies aren't filtered. This behavior is enabled to allow a
+    // graceful update of the Legacy Browser Support extension; it'll be removed
+    // in a future release. http://crbug.com/240704
+    if (!schema->valid())
+      continue;
+
+    PolicyMap* map = it->second;
+    for (PolicyMap::const_iterator it_map = map->begin();
+         it_map != map->end();) {
+      const std::string& policy_name = it_map->first;
+      const base::Value* policy_value = it_map->second.value;
+      Schema policy_schema = schema->GetProperty(policy_name);
+      ++it_map;
+      if (!policy_value || !policy_schema.Matches(*policy_value))
+        map->Erase(policy_name);
+    }
+  }
+}
+
+}  // namespace policy