C++ FLFieldMetaData::type方法代码示例

QVariant FLUtil::nextCounter( const QString & name, FLSqlCursor * cursor_ ) {
  if ( !cursor_ )
    return QVariant();

  FLTableMetaData *tMD = cursor_->metadata();

  if ( !tMD )
    return QVariant();

  FLFieldMetaData *field = tMD->field( name );

  if ( !field )
    return QVariant();

  int type = field->type();

  if ( type != QVariant::String && type != QVariant::Double )
    return QVariant();

  unsigned int len = field->length();
  QString cadena;

  FLSqlQuery q( 0, cursor_->db()->connectionName() );
  q.setForwardOnly( true );
  q.setTablesList( tMD->name() );
  q.setSelect( name );
  q.setFrom( tMD->name() );
  q.setWhere( "LENGTH(" + name + ")=" + QString::number( len ) );
  q.setOrderBy( name + " DESC" );

  if ( !q.exec() )
    return QVariant();

  double maxRange = pow( 10, len );
  double numero = maxRange;

  while ( numero >= maxRange ) {
    if ( !q.next() ) {
      numero = 1;
      break;
    }
    numero = q.value( 0 ).toDouble();
    numero++;
  }

  if ( type == QVariant::String ) {
    cadena = QString::number( numero, 'f', 0 );
    if ( cadena.length() < len ) {
      QString str;
      str.fill( '0', ( len - cadena.length() ) );
      cadena = str + cadena;
    }
    return QVariant( cadena );
  }

  if ( type == QVariant::Double )
    return QVariant( numero );

  return QVariant();
}

QSqlRecordInfo SqliteDriver::recordInfo(const QString &tablename) const
{
  QSqlRecordInfo info;
  if (!isOpen() || !dataBase_)
    return info;
  QDomDocument doc(tablename);
  QDomElement docElem;
  QString stream = db_->managerModules()->contentCached(tablename + ".mtd");
  if (!FLUtil::domDocumentSetContent(doc, stream)) {
#ifdef FL_DEBUG
    qWarning("FLManager : " + QApplication::tr("Error al cargar los metadatos para la tabla %1").arg(tablename));
#endif

    return recordInfo2(tablename);
  }
  docElem = doc.documentElement();
  FLTableMetaData *mtd = db_->manager()->metadata(&docElem, true);
  if (!mtd)
    return recordInfo2(tablename);
  FLTableMetaData::FLFieldMetaDataList *fl = mtd->fieldList();
  if (!fl) {
    delete mtd;
    return recordInfo2(tablename);
  }
  if (fl->isEmpty()) {
    delete mtd;
    return recordInfo2(tablename);
  }

  QStringList fieldsNames = QStringList::split(",", mtd->fieldsNames());
  for (QStringList::Iterator it = fieldsNames.begin(); it != fieldsNames.end(); ++it) {
    FLFieldMetaData *field = mtd->field((*it));
    info.append(QSqlFieldInfo(field->name(), FLFieldMetaData::flDecodeType(field->type())));
  }

  delete mtd;
  return info;
}

QString SqliteDriver::sqlCreateTable(FLTableMetaData *tmd)
{
#ifndef FL_QUICK_CLIENT
  if (!tmd)
    return QString::null;

  QString primaryKey(QString::null);
  QString sql = "CREATE TABLE " + tmd->name() + " (";

  FLFieldMetaData *field;
  FLTableMetaData::FLFieldMetaDataList *fieldList = tmd->fieldList();

  unsigned int unlocks = 0;
  QDictIterator<FLFieldMetaData> it(*fieldList);
  while ((field = it.current()) != 0) {
    ++it;
    if (field->type() == FLFieldMetaData::Unlock)
      unlocks++;
  }
  if (unlocks > 1) {
#ifdef FL_DEBUG
    qWarning("FLManager : " + QApplication::tr("No se ha podido crear la tabla ") + tmd->name());
    qWarning("FLManager : " + QApplication::tr("Hay más de un campo tipo unlock. Solo puede haber uno."));
#endif

    return QString::null;
  }

  QDictIterator<FLFieldMetaData> it2(*fieldList);
  while ((field = it2.current()) != 0) {
    ++it2;
    sql += field->name();
    switch (field->type()) {
      case QVariant::Int:
        sql += " INTEGER";
        break;

      case QVariant::UInt:
        sql += " INTEGER";
        break;

      case QVariant::Bool:
      case FLFieldMetaData::Unlock:
        sql += " BOOLEAN";
        break;

      case QVariant::Double:
        sql += " FLOAT";
        break;

      case QVariant::Time:
        sql += " VARCHAR(20)";
        break;

      case QVariant::Date:
        sql += " VARCHAR(20)";
        break;

      case QVariant::Pixmap:
        sql += " TEXT";
        break;

      case QVariant::String:
        sql += " VARCHAR";
        break;

      case QVariant::StringList:
        sql += " TEXT";
        break;

      case QVariant::ByteArray:
        sql += " CLOB";
        break;

      case FLFieldMetaData::Serial:
        sql += " INTEGER";
        if (!field->isPrimaryKey())
          sql += " PRIMARY KEY";
        break;
    }

    int longitud = field->length();
    if (longitud > 0)
      sql += "(" + QString::number(longitud) + ")";

    if (field->isPrimaryKey()) {
      if (primaryKey.isEmpty()) {
        sql += " PRIMARY KEY";
        primaryKey = field->name();
      } else {
#ifdef FL_DEBUG
        qWarning(QApplication::tr("FLManager : Tabla -> ") +
                 tmd->name() + QApplication::tr(" . Se ha intentado poner una segunda clave primaria para el campo ") +
                 field->name() + QApplication::tr(" , pero el campo ") + primaryKey +
                 QApplication::tr(" ya es clave primaria. Sólo puede existir una clave primaria en FLTableMetaData, use FLCompoundKey para crear claves compuestas."));
#endif

        return QString::null;
      }
    } else {
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    if ((oldMTD != newMTD) && oldMTD)
      delete oldMTD;
    if (newMTD)
      delete newMTD;
    return false;
  }

  if (fieldList->isEmpty()) {
#ifdef FL_DEBUG
    qWarning("FLManager::alterTable : " + QApplication::tr("Los nuevos metadatos no tienen campos."));
#endif

    db_->dbAux() ->rollback();
    if ((oldMTD != newMTD) && oldMTD)
      delete oldMTD;
    if (newMTD)
      delete newMTD;
    return false;
  }

  QVariant v;
  bool ok = true;
  while (oldCursor.next()) {
    newBuffer = newCursor.primeInsert();

    QDictIterator<FLFieldMetaData> it(*fieldList);
    while ((newField = it.current()) != 0) {
      ++it;
      oldField = oldMTD->field(newField->name());
      if (!oldField || !oldCursor.field(oldField->name())) {
        if (!oldField)
          oldField = newField;
        v = newField->defaultValue();
        v.cast(FLFieldMetaData::flDecodeType(newField->type()));
      } else {
        v = oldCursor.value(newField->name());
        if ((!oldField->allowNull() || !newField->allowNull()) &&
            (v.isNull() || !v.isValid())) {
          QVariant defVal(newField->defaultValue());
          if (!defVal.isNull() && defVal.isValid())
            v = defVal;
        }
        if (!v.cast(newBuffer->value(newField->name()).type())) {
#ifdef FL_DEBUG
          qWarning("FLManager::alterTable : " +
                   QApplication::tr("Los tipos del campo %1 no son compatibles. Se introducirá un valor nulo.")
                   .arg(newField->name()));
#endif
        }
      }
      if ((!oldField->allowNull() || !newField->allowNull()) && (v.isNull() || !v.isValid())) {
        switch (oldField->type()) {
          case QVariant::Int:
          case FLFieldMetaData::Serial:
          case QVariant::UInt:
          case QVariant::Bool:
          case FLFieldMetaData::Unlock:
            v =  int(0);
            break;
          case QVariant::Double:
            v = double(0.0);
            break;
          case QVariant::Time:
            v = QTime::currentTime();
            break;
          case QVariant::Date:

//.........这里部分代码省略.........
        no = no.nextSibling();
        continue;
      }
      if (e.tagName() == "concurWarn") {
        cw = (e.text() == "true");
        no = no.nextSibling();
        continue;
      }
      if (e.tagName() == "detectLocks") {
        dl = (e.text() == "true");
        no = no.nextSibling();
        continue;
      }
    }
    no = no.nextSibling();
  }

  FLTableMetaData *tmd = new FLTableMetaData(name, a, q);
  FLCompoundKey *cK = 0;
  QStringList assocs;

  tmd->setConcurWarn(cw);
  tmd->setDetectLocks(dl);
  no = mtd->firstChild();

  while (!no.isNull()) {
    QDomElement e = no.toElement();
    if (!e.isNull()) {
      if (e.tagName() == "field") {
        FLFieldMetaData *f = metadataField(&e, v, ed);
        if (!tmd)
          tmd = new FLTableMetaData(name, a, q);
        tmd->addFieldMD(f);
        if (f->isCompoundKey()) {
          if (!cK)
            cK = new FLCompoundKey();
          cK->addFieldMD(f);
        }
        if (!f->associatedFieldName().isEmpty()) {
          assocs.append(f->associatedFieldName());
          assocs.append(f->associatedFieldFilterTo());
          assocs.append(f->name());
        }
        no = no.nextSibling();
        continue;
      }
    }
    no = no.nextSibling();
  }

  tmd->setCompoundKey(cK);
  QString aWith, aBy;

  for (QStringList::Iterator it = assocs.begin(); it != assocs.end(); ++it) {
    aWith = (*it);
    ++it;
    aBy = (*it);
    ++it;
    tmd->field((*it))->setAssociatedField(tmd->field(aWith), aBy);
  }

  if (!q.isEmpty() && !quick) {
    FLSqlQuery *qry = query(q, tmd);

    if (qry) {
      QStringList fL = qry->fieldList();
      QString table, field;
      QString fields = tmd->fieldsNames();

      for (QStringList::Iterator it = fL.begin(); it != fL.end(); ++it) {
        table = (*it).section('.', 0, 0);
        field = (*it).section('.', 1, 1);

        if (table == name || fields.contains(field.lower()))
          continue;

        FLTableMetaData *mtdAux = metadata(table, true);
        if (mtdAux) {
          FLFieldMetaData *fmtdAux = mtdAux->field(field);
          if (fmtdAux) {
            int typeAux = fmtdAux->type();
            if (typeAux == FLFieldMetaData::Serial)
              typeAux = QVariant::UInt;
            tmd->addFieldMD(new FLFieldMetaData(field, fmtdAux->alias(), true, false, typeAux, fmtdAux->length(),
                                                false, fmtdAux->visible(), fmtdAux->editable(), fmtdAux->partInteger(),
                                                fmtdAux->partDecimal(), false, false, false, QVariant(), false,
                                                QString::null, fmtdAux->visibleGrid(), true, false));
          }
        }
      }

      qry->deleteLater();
    }
  }

  FLAccessControlLists *acl = aqApp ->acl();
  if (acl)
    acl->process(tmd);
  return tmd;
}