Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/Java/Openjdk/src/jdk.jpackage/windows/native/common/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 9 kB

Quelle MsiDb.cpp Sprache: C

/*
* Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

#include "MsiDb.h"
#include "FileUtils.h"
#include "WinFileUtils.h"
#include "Log.h"

// Code in this file requires linking with msi.lib

namespace msi {

void closeDatabaseView(MSIHANDLE hView) {
    if (hView) {
        const auto status = MsiViewClose(hView);
        if (status != ERROR_SUCCESS) {
            LOG_WARNING(tstrings::any() << "MsiViewClose("
                                << hView << ") failed with error=" << status);
            return;
        }
        closeMSIHANDLE(hView);
    }
}

namespace {
MSIHANDLE openDatabase(const tstring& msiPath) {
    MSIHANDLE h = 0;
    const UINT status = MsiOpenDatabase(msiPath.c_str(),
                                                    MSIDBOPEN_READONLY, &h);
    if (status != ERROR_SUCCESS) {
        JP_THROW(Error(tstrings::any()
                                << "MsiOpenDatabase(" << msiPath
                                << ", MSIDBOPEN_READONLY) failed", status));
    }
    return h;
}

} // namespace

Database::Database(const Guid& productCode):
        msiPath(getProductInfo(productCode, INSTALLPROPERTY_LOCALPACKAGE)),
                                            dbHandle(openDatabase(msiPath)) {
}

Database::Database(const tstring& msiPath): msiPath(msiPath),
                                            dbHandle(openDatabase(msiPath)) {
}

tstring Database::getProperty(const tstring& name) const {
    // Query value of a property with the given name from 'Property' MSI table.
    const tstring sqlQuery = (tstrings::any()
                    << "SELECT Value FROM Property WHERE Property = '"
                    << name << "'").tstr();

    DatabaseView view(*this, sqlQuery);
    const DatabaseRecord record(view);

    // Data is stored in a record object. SQL query is constructed in a way
    // this record object contains a single field.
    // Verify record contains exactly one field.
    if (record.getFieldCount() != 1) {
        JP_THROW(Error(
                    tstrings::any() << "record.getFieldCount(" << msiPath
                                    << ", " << sqlQuery
                                    << ") returned unexpected value",
                    ERROR_SUCCESS));
    }

    // Field identifier. They start with 1, not from 0.
    const unsigned field = 1;
    return record.getString(field);
}

tstring Database::getProperty(const std::nothrow_t&, const tstring& name) const {
    try {
        return getProperty(name);
    } catch (const NoMoreItemsError&) {
    }
    JP_CATCH_EXCEPTIONS;
    return tstring();
}

DatabaseRecord::DatabaseRecord(unsigned fieldCount) {
    MSIHANDLE h = MsiCreateRecord(fieldCount);
    if (!h) {
        JP_THROW(msi::Error(tstrings::any() << "MsiCreateRecord("
                        << fieldCount << ") failed", ERROR_FUNCTION_FAILED));
    }
    handle = h;
}

DatabaseRecord& DatabaseRecord::operator=(const DatabaseRecord& other) {
    DatabaseRecord tmp(other);
    std::swap(handle, tmp.handle);
    return *this;
}

DatabaseRecord& DatabaseRecord::fetch(DatabaseView& view) {
    *this = view.fetch();
    return *this;
}

DatabaseRecord& DatabaseRecord::tryFetch(DatabaseView& view) {
    *this = view.tryFetch();
    return *this;
}

DatabaseRecord& DatabaseRecord::setString(unsigned idx, const tstring& v) {
    const UINT status = MsiRecordSetString(handle, idx, v.c_str());
    if (status != ERROR_SUCCESS) {
        JP_THROW(Error(tstrings::any() << "MsiRecordSetString(" << idx
                                        << ", " << v << ") failed", status));
    }
    return *this;
}

DatabaseRecord& DatabaseRecord::setInteger(unsigned idx, int v) {
    const UINT status = MsiRecordSetInteger(handle, idx, v);
    if (status != ERROR_SUCCESS) {
        JP_THROW(Error(tstrings::any() << "MsiRecordSetInteger(" << idx
                                        << ", " << v << ") failed", status));
    }
    return *this;
}

DatabaseRecord& DatabaseRecord::setStreamFromFile(unsigned idx,
                                                        const tstring& v) {
    const UINT status = MsiRecordSetStream(handle, idx, v.c_str());
    if (status != ERROR_SUCCESS) {
        JP_THROW(Error(tstrings::any() << "MsiRecordSetStream(" << idx
                                        << ", " << v << ") failed", status));
    }
    return *this;
}

unsigned DatabaseRecord::getFieldCount() const {
    const unsigned reply = MsiRecordGetFieldCount(handle);
    if (int(reply) <= 0) {
        JP_THROW(Error(std::string("MsiRecordGetFieldCount() failed"),
                                                    ERROR_FUNCTION_FAILED));
    }
    return reply;
}

int DatabaseRecord::getInteger(unsigned idx) const {
    int const reply = MsiRecordGetInteger(handle, idx);
    if (reply == MSI_NULL_INTEGER) {
        JP_THROW(Error(tstrings::any() << "MsiRecordGetInteger(" << idx
                                        << ") failed", ERROR_FUNCTION_FAILED));
    }
    return reply;
}

void DatabaseRecord::saveStreamToFile(unsigned idx,
                                                const tstring& path) const {
    enum { ReadStreamBufferBytes = 1024 * 1024 };

    FileUtils::FileWriter writer(path);

    std::vector<char> buffer(ReadStreamBufferBytes);
    DWORD bytes;
    do {
        bytes = ReadStreamBufferBytes;
        const UINT status = MsiRecordReadStream(handle, UINT(idx),
                                                    buffer.data(), &bytes);
        if (status != ERROR_SUCCESS) {
            JP_THROW(Error(std::string("MsiRecordReadStream() failed"),
                                                                    status));
        }
        writer.write(buffer.data(), bytes);
    } while(bytes == ReadStreamBufferBytes);
    writer.finalize();
}

DatabaseView::DatabaseView(const Database& db, const tstring& sqlQuery,
            const DatabaseRecord& queryParam): db(db), sqlQuery(sqlQuery) {
    MSIHANDLE h = 0;

    // Create SQL query.
    for (const UINT status = MsiDatabaseOpenView(db.dbHandle,
                            sqlQuery.c_str(), &h); status != ERROR_SUCCESS; ) {
        JP_THROW(Error(tstrings::any() << "MsiDatabaseOpenView("
                                        << sqlQuery << ") failed", status));
    }

    // Run SQL query.
    for (const UINT status = MsiViewExecute(h, queryParam.handle);
                                                status != ERROR_SUCCESS; ) {
        closeMSIHANDLE(h);
        JP_THROW(Error(tstrings::any() << "MsiViewExecute("
                                        << sqlQuery << ") failed", status));
    }

    // MsiViewClose should be called only after
    // successful MsiViewExecute() call.
    handle = h;
}

DatabaseRecord DatabaseView::fetch() {
    DatabaseRecord reply = tryFetch();
    if (reply.empty()) {
        JP_THROW(NoMoreItemsError(tstrings::any() << "No more items in ["
                                                << sqlQuery << "] query"));
    }
    return reply;
}

DatabaseRecord DatabaseView::tryFetch() {
    MSIHANDLE h = 0;

    // Fetch data from executed SQL query.
    // Data is stored in a record object.
    for (const UINT status = MsiViewFetch(handle, &h);
                                                status != ERROR_SUCCESS; ) {
        if (status == ERROR_NO_MORE_ITEMS) {
            return DatabaseRecord();
        }

        JP_THROW(Error(tstrings::any() << "MsiViewFetch(" << sqlQuery
                                                    << ") failed", status));
    }

    DatabaseRecord reply;
    reply.handle = h;
    return reply;
}

DatabaseView& DatabaseView::modify(const DatabaseRecord& record,
                                                        MSIMODIFY mode) {
    const UINT status = MsiViewModify(handle, mode, record.handle);
    if (status != ERROR_SUCCESS) {
        JP_THROW(Error(tstrings::any() << "MsiViewModify(mode=" << mode
                                                    << ") failed", status));
    }
    return *this;
}

} // namespace msi

quality96%

¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.