package custom.gef.editor.model;import custom.gef.editor.model.connection.MessageFromModel;import custom.gef.editor.model.connection.MessageToModel;import custom.gef.editor.model.port.PortGuideModel;import custom.gef.editor.model.port.PortOperationModel;public class XmlHeadFactory {    public final static String HEAD_ERROR="ERROR_HEAD";         //connection model XML head    public final static String HEAD_CONNECTION="Connection";    //public final static String HEAD_FOUND=HEAD_CONNECTION+"FoundModel";    public final static String HEAD_CONNECTIONFROM=HEAD_CONNECTION+"From";    public final static String HEAD_CONNECTIONTO=HEAD_CONNECTION+"To";        //port model XML head    public final static String HEAD_PORT="Port";    public final static String HEAD_PORTOPERATION=HEAD_PORT+"OperationModel";    public final static String HEAD_PORTGUIDE =HEAD_PORT+"GuideModel";        public static String getModelXMLHead(ElementModel model){                 if(model instanceof ConnectionElementModel)            return getConnectioModelXMLHead(model);         else if(model instanceof PortElementModel)            return getPortModelXMLHead(model);         return HEAD_ERROR;    }            public static String getConnectioModelXMLHead(ElementModel model){                  /*if(model instanceof FoundModel){                    return HEAD_FOUND;         }         else */if(model instanceof MessageFromModel){                    return HEAD_CONNECTIONFROM;         }         else if(model instanceof MessageToModel){                    return HEAD_CONNECTIONTO;         }         return HEAD_ERROR;         }        public static String getPortModelXMLHead(ElementModel model){        if(model instanceof PortOperationModel){            return HEAD_PORTOPERATION;        }        else if(model instanceof PortGuideModel){            return HEAD_PORTGUIDE;        }        return HEAD_ERROR;    }    }