javacommons/javastorage/inc/javastorage.h
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/*
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  JavaStorage
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*
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*/
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#ifndef JAVASTORAGE_H
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#define JAVASTORAGE_H
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#include <stdio.h>
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#include <string>
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#include <set>
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#include <list>
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#include "javaosheaders.h"
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#include "javastorageentry.h"
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#include "javastorageexception.h"
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namespace java
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{
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namespace util
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{
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class Uid;
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} // end namespace util
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namespace storage
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{
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typedef std::list<std::multiset<java::storage::JavaStorageEntry> > JavaStorageApplicationList_t;
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typedef std::multiset<JavaStorageEntry> JavaStorageApplicationEntry_t;
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/**
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 * JavaStorage provides access to Java platform data. Through this API
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 * Java platform related data can be read and manipulated. It provides
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 * transactions to enable integrity. However all operations can be executed
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 * without transactions but integrity is not provided that way.
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 *
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 * API is single threaded i.e. same session cannot be shared between threads
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 * or processes. If the session is used in multithreaded system each thread
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 * must have own storage session.
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 */
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class JavaStorage
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{
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public:
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    virtual ~JavaStorage() {}
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    /**
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     * Create API instance.
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     *
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     * @return Instance to JavaStorage API. Ownership is transfered to caller.
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     */
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    OS_IMPORT static JavaStorage* createInstance();
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    /**
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     * Open storage connection. If storage does not exist creates it.
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     *
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     * @param aStorageName Full path to storage if not predefined storage used
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     *                     otherwise storage name.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidStorage: Storage name is invalid.
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     *             EInternalError: Session creation failed.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void open(const std::string& aStorageName)
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    throw(JavaStorageException) = 0;
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    /**
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     * Open connection to default Java storage.
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     *
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidStorage: Storage name is invalid.
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     *             EInternalError: Session creation failed.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void open() throw(JavaStorageException) = 0;
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    /**
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     * Close JavaStorage and free its resources.
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     *
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     * @throws JavaStorageException with following error codes:
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void close() throw(JavaStorageException) = 0;
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    /**
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     * Start transaction.
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     * Starting transaction aquires exlusive lock to underlying storage
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     * component. It means other connections cannot alter storage data
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     * until lock is released. Lock is storage not table specific. Data
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     * reading is possible while lock is on.
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     *
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     * For this reason transaction should be as short as possible. It
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     * should be considered if storage connection is used only for reading
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     * that transaction is not started at all.
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     *
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     * @throws JavaStorageException with following error codes:
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void startTransaction() throw(JavaStorageException) = 0;
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   116
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    /**
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     * Commit transaction. After commit data is written to physical storage
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     * as soon as it is possible. Data becomes visible to other clients
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     * and lock is released.
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     *
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     * @throws JavaStorageException with following error codes:
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void commitTransaction() throw(JavaStorageException) = 0;
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    /**
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     * Rollback changes from storage. After rollback data is retained
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     * as soon as it is possible and lock is released.
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     *
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     * @throws JavaStorageException with following error codes:
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void rollbackTransaction() throw(JavaStorageException) = 0;
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    /**
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     * Read storage entries from storage. All entries belogning to Uid
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     * on given table are returned.
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     *
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     * @param aTablename table where entries are read.
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     * @param aUid used to identify entries to be read.
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     * @param[out] aEntries entries container that is populated by read
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     *             entries. Container is left empty if no data read.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void read(
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        const std::string& aTablename,
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        const java::util::Uid& aUid,
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        JavaStorageApplicationEntry_t& aEntries
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    ) throw(JavaStorageException) = 0;
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    /**
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     * Write storage entries. Entries are written to given table and
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     * they're identified by given Uid. If table contains entry sharing same
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     * primary key write fails. Use update to update these entries.
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     *
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     * @param aTablename table where entries are written.
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     * @param aEntries entries to be written.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void write(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aEntries
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    ) throw(JavaStorageException) = 0;
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    /**
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     * Update storage entries. If application has already entry in the storage
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     * table update must be used instead of write.
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     *
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     * @param aTablename table where entries are updated.
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     * @param aUpdateEntry entries to be updated.
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     * @param aMatchEntry is used to identify which entries are updated. Usually
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     *                    this contains only ID.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: If given arguments are empty.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void update(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aUpdateEntry,
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        const JavaStorageApplicationEntry_t& aMatchEntry
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    ) throw(JavaStorageException) = 0;
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    /**
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     * Search entries from storage.
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     * Query is used to search entries based on table attributes.<br>
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     *
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     * Example1: It can be used to search application Uid based on
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     * application name and vendor pair. This case search query defines
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     * NAME and VENDOR with their values. Result contain all matching
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     * applications in given table. All application entries are returned.<br>
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     *
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     * @code
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     * JavaStorageEntry attr;
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     * JavaStorageApplicationEntry_t query;
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     * attr.setEntry(NAME, L"MyName"); // Match item.
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     * query.insert(attr);
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     * attr.setEntry(VENDOR, L"MyVendor"); // Match item.
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     * query.insert(attr);
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     * attr.setEntry(ID, L""); // Fecth item.
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     * query.insert(attr);
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     * ...
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     * @endcode
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     *
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     * Example2: It can be used to search all applications that are bound to
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     * specific security domain. This case query contains entry name
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     * like SECURITY_DOMAIN with intrested security domain value. All
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     * applications belogning to given security domain with all entries
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     * are returned.<br>
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     *
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     * @code
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     * JavaStorageEntry attr;
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     * JavaStorageApplicationEntry_t query;
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     * attr.setEntry(SECYRITY_DOMAIN, L"MyDomain"); // Match item
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     * query.insert(attr);
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     * ...
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     * @endcode
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     *
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     * Example3: It can be used to read only subset of application entries.
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     * For this case only subset of entries is defined like PACKAGE_NAME,
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     * VENDOR and VERSION without values. To match certain
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     * application for instance ID must be specified with value. Otherwise
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     * all defined entries of all table applications are returned
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     * without possibility to identify which application they belong to.
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     *
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     * @code
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     * JavaStorageEntry attr;
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     * JavaStorageApplicationEntry_t query;
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     * attr.setEntry(ID, L""); // Fetch item.
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     * query.insert(attr);
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     * attr.setEntry(NAME, L""); // Fetch item.
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     * query.insert(attr);
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     * ...  // No match item specified, fecthing all entries.
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     * @endcode
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     *
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     * @param aTablename table where entries are searched.
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     * @param[in] aSearchQuery to mach entries.
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     * @param[out] aApplicationList matching applications. List contain
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     *             JavaApplicationEntry_t objects that contain
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     *             JavaStorageEntries depending on search.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void search(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aSearchQuery,
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        JavaStorageApplicationList_t& aApplicationList
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    ) throw(JavaStorageException) = 0;
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    /**
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     * Remove entries from storage. All information of matching entries are
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     * removed from the table. <br>If part of the entries need to be ramoved
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     * update must be used. Update entries as null which represents same as
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     * deletion.
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     *
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     * @param aTablename table where entries are removed.
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     * @param aRemovePattern pattern to search removed entries.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *             EInvalidDataStructure: Query contains invalid entry.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual int remove(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aRemoveQuery)
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    throw(JavaStorageException) = 0;
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    /**
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     * Create storage table.
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     *
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     * @param aTablename table name.
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     * @param aTableColumns table structure to be created.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *             EInvalidDataStructure: Query contains invalid entry.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void createTable(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aTableColumns
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    ) throw(JavaStorageException) = 0;
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    /**
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     * Append column to existing storage table.
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     *
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     * @param aTablename table name.
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     * @param aTableColumns table structure to be appended.
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     * @throws JavaStorageException with following error codes:
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     *             EInvalidConnection: Connection is not open.
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     *             EInvalidArgument: Read argument is invalid.
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     *             EInvalidDataStructure: Query contains invalid entry.
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     *         Storage error codes if storage handling fails. Codes are
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     *         dependant on underlying storage component.
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     */
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    virtual void appendTable(
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        const std::string& aTablename,
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        const JavaStorageApplicationEntry_t& aTableColumns
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    ) throw(JavaStorageException) = 0;
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};
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} // end namespace storage
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} // end namespace java
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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#endif // JAVASTORAGE_H