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// Copyright (c) 2012 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.
#ifndef SYNC_API_SYNC_ERROR_H_
#define SYNC_API_SYNC_ERROR_H_
#pragma once
#include <iosfwd>
#include <string>
#include "base/memory/scoped_ptr.h"
#include "sync/syncable/model_type.h"
namespace tracked_objects {
class Location;
} // namespace tracked_objects
// Sync errors are used for debug purposes and handled internally and/or
// exposed through Chrome's "about:sync" internal page. They are considered
// unrecoverable for the datatype creating them, and should only be used as
// such.
// This class is copy-friendly and thread-safe.
class SyncError {
public:
// Default constructor refers to "no error", and IsSet() will return false.
SyncError();
// Create a new Sync error triggered by datatype |type| with debug message
// |message| from the specified location. IsSet() will return true.
// Will print the new error to LOG(ERROR).
SyncError(const tracked_objects::Location& location,
const std::string& message,
syncable::ModelType type);
// Copy and assign via deep copy.
SyncError(const SyncError& other);
SyncError& operator=(const SyncError& other);
~SyncError();
// Reset the current error to a new error. May be called irrespective of
// whether IsSet() is true. After this is called, IsSet() will return true.
// Will print the new error to LOG(ERROR).
void Reset(const tracked_objects::Location& location,
const std::string& message,
syncable::ModelType type);
// Whether this is a valid error or not.
bool IsSet() const;
// These must only be called if IsSet() is true.
const tracked_objects::Location& location() const;
const std::string& message() const;
syncable::ModelType type() const;
// Returns empty string is IsSet() is false.
std::string ToString() const;
private:
// Print error information to log.
void PrintLogError() const;
// Make a copy of a SyncError. If other.IsSet() == false, this->IsSet() will
// now return false.
void Copy(const SyncError& other);
// Initialize the local error data with the specified error data. After this
// is called, IsSet() will return true.
void Init(const tracked_objects::Location& location,
const std::string& message,
syncable::ModelType type);
// Reset the error to it's default (unset) values.
void Clear();
// scoped_ptr is necessary because Location objects aren't assignable.
scoped_ptr<tracked_objects::Location> location_;
std::string message_;
syncable::ModelType type_;
};
// gmock printer helper.
void PrintTo(const SyncError& sync_error, std::ostream* os);
#endif // SYNC_API_SYNC_ERROR_H_
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