Insertion Operation While Trying to Connect gvSIG with SQL SERVER

Question

I am trying to create the insertion method in SQL SERVER using gvSIG and Eclipse, but am getting this error, here's the log ( I think the getinsertFeature gets an empty charsetname):

    Exception in thread "main" java.lang.NullPointerException: charsetName
at java.lang.String.<init>(String.java:441)
at java.io.ByteArrayOutputStream.toString(ByteArrayOutputStream.java:187)
at com.iver.cit.gvsig.fmap.drivers.jdbc.mssqlspatial.MicrosoftSqlSpatial.doubleQuote(MicrosoftSqlSpatial.java:162)
at com.iver.cit.gvsig.fmap.drivers.jdbc.mssqlspatial.MicrosoftSqlSpatial.addQuotes(MicrosoftSqlSpatial.java:145)
at com.iver.cit.gvsig.fmap.drivers.jdbc.mssqlspatial.MicrosoftSqlSpatial.getSqlInsertFeature(MicrosoftSqlSpatial.java:218)
at com.iver.cit.gvsig.fmap.drivers.jdbc.mssqlspatial.Main.main(Main.java:50)

here's also the doubleQuote and addQuotes methods: protected String addQuotes(Object value) { String retString;

    if (value != null) {
        if (value instanceof NullValue)
            retString = "null";
        else
            retString = "'" + doubleQuote(value) + "'";

    } else {
        retString = "null";
    }

    return retString;
}

private String doubleQuote(Object obj) {
    String aux = obj.toString().replaceAll("'", "''");
    StringBuffer strBuf = new StringBuffer(aux);
    ByteArrayOutputStream out = new ByteArrayOutputStream(strBuf.length());
    PrintStream printStream = new PrintStream(out);
    printStream.print(aux);
    String aux2 = "ERROR";
    try {
        aux2 = out.toString(toEncode);
        System.out.println(aux + " " + aux2);
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return aux2;
}

Here's the getSqlInsertFeature method:

       public String getSqlInsertFeature(DBLayerDefinition dbLayerDef,
        IFeature feat) throws ProcessVisitorException {


    StringBuffer sqlBuf = new StringBuffer(" USE " +dbLayerDef.getDataBase()+ "INSERT INTO "
            + dbLayerDef.getComposedTableName() + " (");
    String sql = null;
    int numAlphanumericFields = dbLayerDef.getFieldNames().length;

    for (int i = 0; i < numAlphanumericFields; i++) {
        String name = dbLayerDef.getFieldsDesc()[i].getFieldName();
        // if (cols.contains(name) && (!name.equals(uniqueCol) ||
        // existsUnique)) {
        if (name.equals(dbLayerDef.getFieldID()))
            continue;
        sqlBuf.append(" " + "\""+name+"\"" + ",");
        // }
    }
    sqlBuf.append(" " + dbLayerDef.getFieldGeometry());
    // sqlBuf.deleteCharAt(sqlBuf.lastIndexOf(","));
    sqlBuf.append(" ) VALUES (");
    String insertQueryHead = sqlBuf.toString();
    sqlBuf = new StringBuffer(insertQueryHead);
    for (int j = 0; j < numAlphanumericFields; j++) {
        String name = dbLayerDef.getFieldsDesc()[j].getFieldName();
        if (name.equals(dbLayerDef.getFieldID()))
            continue;

        if (isNumeric(feat.getAttribute(j))){
            sqlBuf.append(feat.getAttribute(j) + ", ");
        }else if(feat.getAttribute(j).getSQLType() == Types.DATE){
            //If the field is a date, the driver can not use the client encoding.
            //It uses the same encoding that the user has written on the table
            sqlBuf.append(addQuotes(((DateValue)feat.getAttribute(j)).getValue().toString()) + ", ");
        }else{
            sqlBuf.append(addQuotes(feat.getAttribute(j)) + ", ");
        }
    }
    IGeometry geometry=feat.getGeometry();
    int type=dbLayerDef.getShapeType();
    if (geometry.getGeometryType()!=type){
        if (type==FShape.POLYGON){
            geometry=ShapeFactory.createPolygon2D(new GeneralPathX(geometry.getInternalShape()));
        }else if (type==FShape.LINE){
            geometry=ShapeFactory.createPolyline2D(new GeneralPathX(geometry.getInternalShape()));
        }else if (type==(FShape.POLYGON|FShape.Z)){
            geometry=ShapeFactory.createPolygon3D(new GeneralPathX(geometry.getInternalShape()),((IGeometry3D)geometry).getZs());
        }else if (type==(FShape.LINE|FShape.Z)){
            geometry=ShapeFactory.createPolyline3D(new GeneralPathX(geometry.getInternalShape()),((IGeometry3D)geometry).getZs());
        }else if (type==(FShape.LINE|FShape.M)){ //MCoord
            geometry=ShapeMFactory.createPolyline2DM(new GeneralPathX(geometry.getInternalShape()),((IGeometryM)geometry).getMs()); //MCoord
        }
    }
    if (!isCorrectGeometry(geometry, type))
        throw new ProcessVisitorException("incorrect_geometry",new Exception());
    //MCoord
    if ((type == (FShape.LINE|FShape.M)) || (type == (FShape.POINT|FShape.M))){

        // stmt.execute("INSERT INTO testTable (id,name, Geom) VALUES (1,'a name', geometry::STGeomFromText('LINESTRING (100 100, 20 180, 180 180)', 0))");

        sqlBuf.append(" geometry::STGeomFromText( '"
                + ((FShapeM)geometry.getInternalShape()).toText() + "', "
                + DefaultJDBCDriver.removePrefix(dbLayerDef.getSRID_EPSG()) + ")");
    }else{
        Geometry jtsGeom=geometry.toJTSGeometry();
        if (jtsGeom==null || !isCorrectType(jtsGeom, type)){
            throw new ProcessVisitorException("incorrect_geometry",new Exception());
        }
        sqlBuf.append(" geometry::STGeomFromText( '"
            + jtsGeom.toText() + "', "
            + DefaultJDBCDriver.removePrefix(dbLayerDef.getSRID_EPSG()) + ")");
    }

    // sqlBuf.deleteCharAt(sqlBuf.lastIndexOf(","));
    sqlBuf.append(" ) ");
    sql = sqlBuf.toString();
    return sql;
}

and the main too (sorry it's too long, but I can't figure out the error):

   public class Main {

/**
 * @param args
 * @throws ProcessVisitorException 
 */
public static void main(String[] args) throws ProcessVisitorException {
    DBLayerDefinition dbLayerDef =new DBLayerDefinition();
    dbLayerDef.setDataBase("harhoura");
    String[] fieldsDescr=new String[]{"id","nom","prenom","adresse"};
    dbLayerDef.setFieldNames(fieldsDescr);
    MicrosoftSqlSpatial m=new MicrosoftSqlSpatial();
    dbLayerDef.setFieldID("gid");
    dbLayerDef.setTableName("tableSpatial");
    dbLayerDef.setFieldGeometry("the_geom");
    Value[] value = new Value[2];



        value[0] = ValueFactory.createValue("hh");
        value[1] = ValueFactory.createValue("pp");
        IGeometry geom = null;


        String str="POLYGON((368549.975515418 380972.971955164,368563.061999346 380972.669377501,368561.170888952 380967.071690734,368555.346268938 380966.61782424,368543.470095662 380965.861380082,368532.274722128 380964.802358261,368532.04778888 380966.390890992,368531.896500049 380968.735867881,368531.745211217 380970.929555939,368531.669566801 380972.442444254,368531.669566801 380973.577110491,368549.975515418 380972.971955164,368549.975515418 380972.971955164,368549.975515418 380972.971955164,368549.975515418 380972.971955164))";

        geom=getGeomFromDBJournal(str);
        IFeature feat = new DefaultFeature(geom, value, "" + 3);


     String query=m.getSqlInsertFeature(dbLayerDef, feat);

System.out.println(query);
}

public static IGeometry getGeomFromDBJournal(String str) {
      IGeometry geom = null;
      WKTParser wktParser = new WKTParser();

      try {
             geom = wktParser.read(str);


      } catch (Exception e1) {
          e1.printStackTrace();
      }
      return geom;

    }

}

Thanks for help.