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// Copyright 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.
#include "components/sync/syncable/read_node.h"
#include "base/logging.h"
#include "components/sync/base/hash_util.h"
#include "components/sync/syncable/base_transaction.h"
#include "components/sync/syncable/entry.h"
#include "components/sync/syncable/syncable_base_transaction.h"
namespace syncer {
//////////////////////////////////////////////////////////////////////////
// ReadNode member definitions
ReadNode::ReadNode(const BaseTransaction* transaction)
: entry_(nullptr), transaction_(transaction) {
DCHECK(transaction);
}
ReadNode::ReadNode() {
entry_ = nullptr;
transaction_ = nullptr;
}
ReadNode::~ReadNode() {
delete entry_;
}
void ReadNode::InitByRootLookup() {
DCHECK(!entry_) << "Init called twice";
syncable::BaseTransaction* trans = transaction_->GetWrappedTrans();
entry_ = new syncable::Entry(trans, syncable::GET_BY_ID, trans->root_id());
if (!entry_->good())
DCHECK(false) << "Could not lookup root node for reading.";
}
BaseNode::InitByLookupResult ReadNode::InitByIdLookup(int64_t id) {
DCHECK(!entry_) << "Init called twice";
DCHECK_NE(id, kInvalidId);
syncable::BaseTransaction* trans = transaction_->GetWrappedTrans();
entry_ = new syncable::Entry(trans, syncable::GET_BY_HANDLE, id);
if (!entry_->good())
return INIT_FAILED_ENTRY_NOT_GOOD;
if (entry_->GetIsDel())
return INIT_FAILED_ENTRY_IS_DEL;
ModelType model_type = GetModelType();
LOG_IF(WARNING, model_type == UNSPECIFIED || model_type == TOP_LEVEL_FOLDER)
<< "SyncAPI InitByIdLookup referencing unusual object.";
return DecryptIfNecessary() ? INIT_OK : INIT_FAILED_DECRYPT_IF_NECESSARY;
}
BaseNode::InitByLookupResult ReadNode::InitByClientTagLookup(
ModelType model_type,
const std::string& tag) {
DCHECK(!entry_) << "Init called twice";
if (tag.empty())
return INIT_FAILED_PRECONDITION;
const std::string hash = GenerateSyncableHash(model_type, tag);
entry_ = new syncable::Entry(transaction_->GetWrappedTrans(),
syncable::GET_BY_CLIENT_TAG, hash);
if (!entry_->good())
return INIT_FAILED_ENTRY_NOT_GOOD;
if (entry_->GetIsDel())
return INIT_FAILED_ENTRY_IS_DEL;
return DecryptIfNecessary() ? INIT_OK : INIT_FAILED_DECRYPT_IF_NECESSARY;
}
const syncable::Entry* ReadNode::GetEntry() const {
return entry_;
}
const BaseTransaction* ReadNode::GetTransaction() const {
return transaction_;
}
int64_t ReadNode::GetTransactionVersion() const {
return GetEntry()->GetTransactionVersion();
}
BaseNode::InitByLookupResult ReadNode::InitByTagLookupForBookmarks(
const std::string& tag) {
DCHECK(!entry_) << "Init called twice";
if (tag.empty())
return INIT_FAILED_PRECONDITION;
syncable::BaseTransaction* trans = transaction_->GetWrappedTrans();
entry_ = new syncable::Entry(trans, syncable::GET_BY_SERVER_TAG, tag);
if (!entry_->good())
return INIT_FAILED_ENTRY_NOT_GOOD;
if (entry_->GetIsDel())
return INIT_FAILED_ENTRY_IS_DEL;
ModelType model_type = GetModelType();
DCHECK_EQ(model_type, BOOKMARKS)
<< "InitByTagLookup deprecated for all types except bookmarks.";
return DecryptIfNecessary() ? INIT_OK : INIT_FAILED_DECRYPT_IF_NECESSARY;
}
BaseNode::InitByLookupResult ReadNode::InitTypeRoot(ModelType type) {
DCHECK(!entry_) << "Init called twice";
if (!IsRealDataType(type))
return INIT_FAILED_PRECONDITION;
syncable::BaseTransaction* trans = transaction_->GetWrappedTrans();
entry_ = new syncable::Entry(trans, syncable::GET_TYPE_ROOT, type);
if (!entry_->good())
return INIT_FAILED_ENTRY_NOT_GOOD;
if (entry_->GetIsDel())
return INIT_FAILED_ENTRY_IS_DEL;
ModelType found_model_type = GetModelType();
LOG_IF(WARNING, found_model_type == UNSPECIFIED ||
found_model_type == TOP_LEVEL_FOLDER)
<< "SyncAPI InitTypeRoot referencing unusually typed object.";
return DecryptIfNecessary() ? INIT_OK : INIT_FAILED_DECRYPT_IF_NECESSARY;
}
} // namespace syncer
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