简单通用数据访问映射层

#ifndef QDAM_H

#define QDAM_H

#include <QMap>

#include <QList>

#include <QString>

class QDam

{

    struct SActionPair{

        QString action;

        QString cmd;

        int group;

    };

    typedef QMap<QString,QString> QCmdMap;

    typedef QList<SActionPair> QActionGroup;

protected:

    QDam();

public:

    static QDam * getInstance();

    QString mapCmd(const QString &cmd);

    QString mapAction(const QString &action);

    QString getCmd(const QString &action);

    QStringList getActionGroup(int n);

protected:

    void readXml();

protected:

    QCmdMap m_cmdMap;

    QActionGroup m_actionGroup;

};

#endif // QDAM_H

#include "qdam.h"

#include "functemplate.h"

#include <QXmlStreamReader>

#include <QFile>

#include <QApplication>

typedef CSingleton<QDam> QDamSingleton;

QDam::QDam()

{

    readXml();

}

QDam * QDam::getInstance()

{

    return QDamSingleton::instance();

}

void QDam::readXml()

{

    QString path = QApplication::applicationDirPath();

    path += "/dam.xml";

    QFile file(path);

    if(file.open(QIODevice::ReadOnly))

    {

        QXmlStreamReader reader(&file);

        while(!reader.atEnd())

        {

            reader.readNextStartElement();

            QString flag = reader.name().toString();

            if(flag == "action")

            {

                SActionPair pa;

                QXmlStreamAttributes attrs = reader.attributes();

                if(!attrs.isEmpty())

                {

                    pa.action = attrs.value("name").toString();

                    pa.cmd = attrs.value("cmd").toString();

                    pa.group = attrs.value("group").toInt();

                    m_actionGroup.append(pa);

                }

            }

            else if(flag == "map")

            {

                QXmlStreamAttributes attrs = reader.attributes();

                if(!attrs.isEmpty())

                {

                    QString cmd = attrs.value("cmd").toString();

                    QString str = reader.readElementText();

                    m_cmdMap[cmd] = str;

                }

            }

        }

    }

}

QString QDam::mapCmd(const QString &cmd)

{

    if(m_cmdMap.contains(cmd))

    {

        return m_cmdMap[cmd];

    }

    return "";

}

QString QDam::mapAction(const QString &action)

{

    QString cmd = getCmd(action);

    return mapCmd(cmd);

}

QString QDam::getCmd(const QString &action)

{

    QActionGroup::iterator it = m_actionGroup.begin();

    for(; it != m_actionGroup.end(); ++it)

    {

        if(it->action == action)

        {

            return it->cmd;

        }

    }

    return "";

}

QStringList QDam::getActionGroup(int n)

{

    QStringList ls;

    QActionGroup::iterator it = m_actionGroup.begin();

    for(; it != m_actionGroup.end(); ++it)

    {

        if(it->group == n)

        {

            ls << it->action;

        }

    }

    return ls;

}

映射XML文件

<?xml version="1.0" encoding="GBK"?><dam><action name = "所有1" cmd = "get_all0" group = "1"/><action name = "所有2" cmd = "get_all1" group = "1"/>

     <action name = "所有3" cmd = "get_all2" group = "1"/>

     <action name = "所有4" cmd = "get_all3" group = "1"/><action name = "专项1" cmd = "get_sp1" group = "2"/><action name = "专项2" cmd = "get_sp2" group = "2"/><action name = "专项3" cmd = "get_sp3" group = "2"/><action name = "专项4" cmd = "get_sp4" group = "2"/><action name = "专项5" cmd = "get_sp5" group = "2"/><action name = "专项6" cmd = "get_sp6" group = "2"/><action name = "专项7" cmd = "get_sp7" group = "2"/><map cmd = "get_all0"> select * from baseInfo </map><map cmd = "get_all1"> select * from baseInfo where id in (select baseInfo_id from classFiltter where typeCode = 1)</map><map cmd = "get_all2"> select * from baseInfo where id in (select baseInfo_id from classFiltter where typeCode = 2)</map><map cmd = "get_all3"> select * from baseInfo where id in (select baseInfo_id from classFiltter where typeCode = 3)</map><map cmd = "get_sp_filtter_with"> select * from baseInfo where id in (select baseInfo_id from technique where techniqueName = '%0') </map><map cmd = "get_allxx"> select * from baseInfo where id in (select baseInfo_id from technique where techniqueName = 'cc++')</map><map cmd = "insert_baseInfo"> insert into BaseInfo values(?,?,?,?,?,?,?,?,?)</map></dam>