Add a property bag which is a typesafe list of arbitrary data that can be

associated with any object.
Review URL: http://codereview.chromium.org/13676

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@6654 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 48 insertions, 0 deletions

diff --git a/chrome/common/property_bag.cc b/chrome/common/property_bag.cc
new file mode 100644
index 0000000..f7c92a3
--- /dev/null
+++ b/chrome/common/property_bag.cc
@@ -0,0 +1,48 @@
+// Copyright (c) 2006-2008 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/common/property_bag.h"
+
+PropertyBag::PropertyBag() {
+}
+
+PropertyBag::PropertyBag(const PropertyBag& other) {
+  operator=(other);
+}
+
+PropertyBag::~PropertyBag() {
+}
+
+PropertyBag& PropertyBag::operator=(const PropertyBag& other) {
+  props_.clear();
+
+  // We need to make copies of each property using the virtual copy() method.
+  for (PropertyMap::const_iterator i = other.props_.begin();
+       i != other.props_.end(); ++i)
+    props_[i->first] = linked_ptr<Prop>(i->second->copy());
+  return *this;
+}
+
+void PropertyBag::SetProperty(PropID id, Prop* prop) {
+  props_[id] = linked_ptr<Prop>(prop);
+}
+
+PropertyBag::Prop* PropertyBag::GetProperty(PropID id) {
+  PropertyMap::const_iterator found = props_.find(id);
+  if (found == props_.end())
+    return NULL;
+  return found->second.get();
+}
+
+void PropertyBag::DeleteProperty(PropID id) {
+  PropertyMap::iterator found = props_.find(id);
+  if (found == props_.end())
+    return;  // Not found, nothing to do.
+  props_.erase(found);
+}
+
+PropertyAccessorBase::PropertyAccessorBase() {
+  static PropertyBag::PropID next_id = 1;
+  prop_id_ = next_id++;
+}