mirror of
https://gitee.com/openharmony/interface_sdk-js
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255 lines
8.5 KiB
TypeScript
255 lines
8.5 KiB
TypeScript
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @kit ArkData
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*/
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import { AsyncCallback, Callback } from './@ohos.base';
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/**
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* Provides interfaces to obtain and modify storage data.
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*
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* @name storage
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences
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* @syscap SystemCapability.DistributedDataManager.Preferences.Core
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*
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*/
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declare namespace storage {
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/**
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* Obtains a {@link Storage} instance matching a specified storage file name.
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*
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* <p>The {@link references} instance loads all data of the storage file and
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* resides in the memory. You can use removeStorageFromCache to remove the instance from the memory.
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*
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* @param path Indicates the path of storage file stored.
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* @returns Returns the {@link Storage} instance matching the specified storage file name.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.getPreferences
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*/
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function getStorageSync(path: string): Storage;
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function getStorage(path: string, callback: AsyncCallback<Storage>): void;
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function getStorage(path: string): Promise<Storage>;
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/**
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* Deletes a {@link Storage} instance matching a specified storage file name
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* from the cache which is performed by removeStorageFromCache and deletes the
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* storage file.
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*
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* <p>When deleting the {@link Storage} instance, you must release all references
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* of the instance. In addition, do not use the instance to perform data operations. Otherwise, inconsistent data
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* will occur.
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*
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* @param path Indicates the path of storage file
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.deletePreferences
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*/
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function deleteStorageSync(path: string): void;
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function deleteStorage(path: string, callback: AsyncCallback<void>): void;
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function deleteStorage(path: string): Promise<void>;
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/**
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* Deletes a {@link Storage} instance matching a specified storage file name
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* from the cache.
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*
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* <p>When deleting the {@link Storage} instance, you must release all references
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* of the instance. In addition, do not use the instance to perform data operations. Otherwise, inconsistent data
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* will occur.
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*
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* @param path Indicates the path of storage file.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.removePreferencesFromCache
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*/
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function removeStorageFromCacheSync(path: string): void;
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function removeStorageFromCache(path: string, callback: AsyncCallback<void>): void;
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function removeStorageFromCache(path: string): Promise<void>;
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/**
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* Provides interfaces to obtain and modify storage data.
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*
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* <p>The storage data is stored in a file, which matches only one {@link Storage} instance in the memory.
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* You can use getStorage to obtain the {@link Storage} instance matching
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* the file that stores storage data, and use removeStorageFromCache
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* to remove the {@link Storage} instance from the memory.
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*
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* @syscap SystemCapability.DistributedDataManager.Preferences.Core
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*
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences
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*/
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interface Storage {
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/**
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* Obtains the value of a storage in the int format.
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*
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* <p>If the value is {@code null} or not in the int format, the default value is returned.
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*
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* @param key Indicates the key of the storage. It cannot be {@code null} or empty.
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* @param defValue Indicates the default value to return.
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* @returns Returns the value matching the specified key if it is found; returns the default value otherwise.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.get
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*/
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getSync(key: string, defValue: ValueType): ValueType;
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get(key: string, defValue: ValueType, callback: AsyncCallback<ValueType>): void;
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get(key: string, defValue: ValueType): Promise<ValueType>;
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/**
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* Checks whether the {@link Storage} object contains a storage matching a specified key.
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*
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* @param key Indicates the key of the storage to check for.
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* @returns Returns {@code true} if the {@link Storage} object contains a storage with the specified key;
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* returns {@code false} otherwise.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.has
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*/
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hasSync(key: string): boolean;
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has(key: string, callback: AsyncCallback<boolean>): boolean;
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has(key: string): Promise<boolean>;
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/**
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* Sets an int value for the key in the {@link Storage} object.
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*
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* <p>You can call the {@link #flush} or {@link #flushSync} method to save the {@link Storage} object to the
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* file.
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*
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* @param key Indicates the key of the storage to modify. It cannot be {@code null} or empty.
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* @param value Indicates the value of the storage.
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* <tt>MAX_KEY_LENGTH</tt>.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.put
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*/
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putSync(key: string, value: ValueType): void;
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put(key: string, value: ValueType, callback: AsyncCallback<void>): void;
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put(key: string, value: ValueType): Promise<void>;
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/**
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* Deletes the storage with a specified key from the {@link Storage} object.
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*
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* <p>You can call the {@link #flush} method to save the {@link Storage} object to the
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* file.
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*
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* @param key Indicates the key of the storage to delete. It cannot be {@code null} or empty.
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* <tt>MAX_KEY_LENGTH</tt>.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.delete
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*/
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deleteSync(key: string): void;
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delete(key: string, callback: AsyncCallback<void>): void;
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delete(key: string): Promise<void>;
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/**
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* Clears all storage from the {@link Storage} object.
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*
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* <p>You can call the {@link #flush} method to save the {@link Storage} object to the
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* file.
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*
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.clear
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*/
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clearSync(): void;
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clear(callback: AsyncCallback<void>): void;
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clear(): Promise<void>;
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/**
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* Asynchronously saves the {@link Storage} object to the file.
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*
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.flush
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*/
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flushSync(): void;
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flush(callback: AsyncCallback<void>): void;
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flush(): Promise<void>;
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/**
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* Registers an observer to listen for the change of a {@link Storage} object.
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*
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* @param callback Indicates the callback when storage changes.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.on
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*/
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on(type: 'change', callback: Callback<StorageObserver>): void;
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/**
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* Unregister an existing observer.
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*
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* @param callback Indicates the registered callback.
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* @throws BusinessError if invoked failed
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* @since 6
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* @deprecated since 9
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* @useinstead ohos.preferences.preferences.off
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*/
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off(type: 'change', callback: Callback<StorageObserver>): void;
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}
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/**
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* Indicates possible value types
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*/
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type ValueType = number | string | boolean;
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/**
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* Define the change data information object.
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*
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* @syscap SystemCapability.DistributedDataManager.Preferences.Core
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*
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* @since 6
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* @deprecated since 9
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*/
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interface StorageObserver {
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/**
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* Indicates which key changes
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*/
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key: string;
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}
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/**
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* Indicates the maximum length of a key (80 characters).
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*/
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const MAX_KEY_LENGTH: 80;
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/**
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* Indicates the maximum length of a string (8192 characters).
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*/
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const MAX_VALUE_LENGTH: 8192;
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}
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export default storage;
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