C++ QApplicationArgument类代码示例

/*!
 \internal
 \relates QApplicationArgument

 Computes a hash key on \a argument's name and returns it.
 */
uint qHash(const QApplicationArgument &argument)
{
    return qHash(argument.name());
}

int main(int argc, char **argv)
{
    enum ExitCode
    {
        /**
         * We start from 2, because QApplicationArgumentParser
         * uses 1.
         */
        QueryFailure = 2,
        StdOutFailure
    };

    const QCoreApplication app(argc, argv);
    QCoreApplication::setApplicationName(QLatin1String("xmlpatterns"));

    QXmlNamePool namePool;
    PatternistApplicationParser parser(argc, argv, namePool);
    parser.setApplicationDescription(QLatin1String("A tool for running XQuery queries."));
    parser.setApplicationVersion(QLatin1String("0.1"));

    QApplicationArgument param(QLatin1String("param"),
                               QXmlPatternistCLI::tr("Binds an external variable. The value is directly available using the variable reference: $name."),
                               qMetaTypeId<Parameter>());
    param.setMaximumOccurrence(-1);
    parser.addArgument(param);

    const QApplicationArgument noformat(QLatin1String("no-format"),
                                        QXmlPatternistCLI::tr("By default output is formatted for readability. When specified, strict serialization is performed."));
    parser.addArgument(noformat);

    const QApplicationArgument isURI(QLatin1String("is-uri"),
                                     QXmlPatternistCLI::tr("If specified, all filenames on the command line are interpreted as URIs instead of a local filenames."));
    parser.addArgument(isURI);

    const QApplicationArgument initialTemplateName(QLatin1String("initial-template"),
            QXmlPatternistCLI::tr("The name of the initial template to call as a Clark Name."),
            QVariant::String);
    parser.addArgument(initialTemplateName);

    /* The temporary object is required to compile with g++ 3.3. */
    QApplicationArgument queryURI = QApplicationArgument(QLatin1String("query/stylesheet"),
                                    QXmlPatternistCLI::tr("A local filename pointing to the query to run. If the name ends with .xsl it's assumed "
                                            "to be an XSL-T stylesheet. If it ends with .xq, it's assumed to be an XQuery query. (In "
                                            "other cases it's also assumed to be an XQuery query, but that interpretation may "
                                            "change in a future release of Qt.)"),
                                    QVariant::String);
    queryURI.setMinimumOccurrence(1);
    queryURI.setNameless(true);
    parser.addArgument(queryURI);

    QApplicationArgument focus = QApplicationArgument(QLatin1String("focus"),
                                 QXmlPatternistCLI::tr("The document to use as focus. Mandatory "
                                         "in case a stylesheet is used. This option is "
                                         "also affected by the is-uris option."),
                                 QVariant::String);
    focus.setMinimumOccurrence(0);
    focus.setNameless(true);
    parser.addArgument(focus);

    QApplicationArgument output(QLatin1String("output"),
                                QXmlPatternistCLI::tr("A local file to which the output should be written. "
                                        "The file is overwritten, or if not exist, created. "
                                        "If absent, stdout is used."),
                                qMetaTypeId<QIODevice *>());
    parser.addArgument(output);

    if(!parser.parse())
        return parser.exitCode();

    /* Get the query URI. */
    const QUrl effectiveURI(finalizeURI(parser, isURI, queryURI));

    QXmlQuery::QueryLanguage lang;

    if(effectiveURI.toString().endsWith(QLatin1String(".xsl")))
        lang = QXmlQuery::XSLT20;
    else
        lang = QXmlQuery::XQuery10;

    if(lang == QXmlQuery::XQuery10 && parser.has(initialTemplateName))
    {
        parser.message(QXmlPatternistCLI::tr("An initial template name cannot be specified when running an XQuery."));
        return QApplicationArgumentParser::ParseError;
    }

    QXmlQuery query(lang, namePool);

    query.setInitialTemplateName(qVariantValue<QXmlName>(parser.value(initialTemplateName)));

    /* Bind external variables. */
    {
        const QVariantList parameters(parser.values(param));
        const int len = parameters.count();

        /* For tracking duplicates. */
        QSet<QString> usedParameters;

        for(int i = 0; i < len; ++i)
        {
            const Parameter p(qVariantValue<Parameter>(parameters.at(i)));
//.........这里部分代码省略.........

/*!
 Returns true if this QApplicationArgument instance is equal to \a other.

 Equalness is defined to only consider name(). If for instance the type() differs
 but the names are equal, this operator will return \c true.
 */
bool QApplicationArgument::operator==(const QApplicationArgument &other) const
{
    return name() == other.name();
}