java - how to retrieve specific chart in power point slide using apache POI -

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i have power point slide has multiple charts (multiple bar , line chart) need update them using apache poi library. far used have 1 chart per slide , used chart using below code identify , update values.

    xslfchart chart = null;     for(poixmldocumentpart part : mainslide.getrelations()){         if(part instanceof xslfchart){             chart = (xslfchart) part;             break;         }     }

not sure how identify specific chart dont see method identify shape

    for(xslfslide slide:ppt.getslides()){         (xslfshape shape : slide.getshapes()) {             if (shapename.equals(shape.getshapename()))                 return slide;         }      }

i gave name table,textbox in powerpoint , can retrieve in code using shapename dont see chart . can 1 me plz?

i figured out way identify of office mate.

first give title chart in power point open layout> chart title> above chart give name . hide title keep font size small , make font color white .

add code in java below

private xslfchart getchartobject(xslfslide mainslide,string chartname) throws ioexception {     xslfchart chart = null;     for(poixmldocumentpart part : mainslide.getrelations()){         if(part instanceof xslfchart){             chart = (xslfchart) part;             if(chart.getctchart().gettitle()!=null && chart.getctchart().gettitle().gettx()!=null){              if(chart.getctchart().gettitle().gettx().getrich().getplist().get(0).getrlist().get(0).gett().equals(chartname))                 break;             }         }     }     return chart; }

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