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// 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 "ios/public/consumer/base/supports_user_data.h"
#include "base/memory/scoped_ptr.h"
#include "base/supports_user_data.h"
namespace ios {
// Class that wraps a ios::SupportsUserData::Data object in a
// base::SupportsUserData::Data object. The wrapper object takes ownership of
// the wrapped object and will delete it on destruction.
class DataAdaptor : public base::SupportsUserData::Data {
public:
DataAdaptor(SupportsUserData::Data* data);
virtual ~DataAdaptor();
SupportsUserData::Data* data() { return data_.get(); }
private:
scoped_ptr<SupportsUserData::Data> data_;
};
DataAdaptor::DataAdaptor(SupportsUserData::Data* data)
: data_(data) {}
DataAdaptor::~DataAdaptor() {}
// Class that subclasses base::SupportsUserData in order to enable it to
// support ios::SupportsUserData::Data objects. It accomplishes this by
// wrapping these objects internally in ios::DataAdaptor objects.
class SupportsUserDataInternal : public base::SupportsUserData {
public:
// Returns the data that is associated with |key|, or NULL if there is no
// such associated data.
ios::SupportsUserData::Data* GetIOSUserData(const void* key);
// Associates |data| with |key|. Takes ownership of |data| and will delete it
// on either a call to |RemoveUserData(key)| or otherwise on destruction.
void SetIOSUserData(const void* key, ios::SupportsUserData::Data* data);
private:
SupportsUserDataInternal() {}
virtual ~SupportsUserDataInternal() {}
friend class ios::SupportsUserData;
};
ios::SupportsUserData::Data* SupportsUserDataInternal::GetIOSUserData(
const void* key) {
DataAdaptor* adaptor = static_cast<DataAdaptor*>(
base::SupportsUserData::GetUserData(key));
if (!adaptor)
return NULL;
return adaptor->data();
}
void SupportsUserDataInternal::SetIOSUserData(
const void* key, ios::SupportsUserData::Data* data) {
base::SupportsUserData::SetUserData(key, new DataAdaptor(data));
}
// ios::SupportsUserData implementation.
SupportsUserData::SupportsUserData()
: internal_helper_(new SupportsUserDataInternal()) {
}
SupportsUserData::~SupportsUserData() {
delete internal_helper_;
}
SupportsUserData::Data* SupportsUserData::GetUserData(const void* key) const {
return internal_helper_->GetIOSUserData(key);
}
void SupportsUserData::SetUserData(const void* key, Data* data) {
internal_helper_->SetIOSUserData(key, data);
}
void SupportsUserData::RemoveUserData(const void* key) {
internal_helper_->RemoveUserData(key);
}
void SupportsUserData::DetachUserDataThread() {
internal_helper_->DetachUserDataThread();
}
} // namespace ios
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