#fixed code
                                private void fixDimensions(String wsName, String coverageStoreName, String csname) {
        final GSImageMosaicEncoder coverageEncoder = copyParameters(wsName, coverageStoreName,
                csname);
  
               
        // activate time dimension
        final GSDimensionInfoEncoder time=new GSDimensionInfoEncoder(true);
        time.setUnit("Seconds");
        time.setUnitSymbol("s");
        time.setPresentation(Presentation.CONTINUOUS_INTERVAL);
        coverageEncoder.setMetadataDimension("time", time);
        
        // activate run which is a custom dimension
        final GSDimensionInfoEncoder run=new GSDimensionInfoEncoder(true);
        run.setPresentation(Presentation.LIST);
        run.setUnit("Hours");
        run.setUnitSymbol("h");
        coverageEncoder.setMetadataDimension("run", run,true);
        
        // persiste the changes
        boolean config=publisher.configureCoverage(coverageEncoder, wsName, csname);
        assertTrue(config);
       
    }
#vulnerable code 
                                private void fixDimensions(String wsName, String coverageStoreName, String csname) {
        // get current config for the coverage to extract the params we want to set again
        final RESTCoverage coverage = reader.getCoverage(wsName, coverageStoreName, csname);
        final Map<String, String> params = coverage.getParametersList();     
        
        // prepare and fill the encoder 
        final GSImageMosaicEncoder coverageEncoder = new GSImageMosaicEncoder();
        coverageEncoder.setName("mosaic");
        
        // set the current params, change here if you want to change the values
        for(Map.Entry<String, String> entry:params.entrySet()){
            if(entry.getKey().equals(GSImageMosaicEncoder.allowMultithreading)){
                coverageEncoder.setAllowMultithreading(Boolean.parseBoolean(entry.getValue()));
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.backgroundValues)){
                coverageEncoder.setBackgroundValues(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.filter)){
                coverageEncoder.setFilter(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.inputTransparentColor)){
                coverageEncoder.setInputTransparentColor(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.maxAllowedTiles)){
                coverageEncoder.setMaxAllowedTiles(Integer.parseInt(entry.getValue()));
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.MERGEBEHAVIOR)){
                coverageEncoder.setMergeBehavior(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.outputTransparentColor)){
                coverageEncoder.setOutputTransparentColor(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.SORTING)){
                coverageEncoder.setSORTING(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.SUGGESTED_TILE_SIZE)){
                coverageEncoder.setSUGGESTED_TILE_SIZE(entry.getValue());
                continue;
            }
            
            if(entry.getKey().equals(GSImageMosaicEncoder.USE_JAI_IMAGEREAD)){
                coverageEncoder.setUSE_JAI_IMAGEREAD(Boolean.parseBoolean(entry.getValue()));
                continue;
            }
            
        }
  
               
        // activate time dimension
        final GSDimensionInfoEncoder time=new GSDimensionInfoEncoder(true);
        time.setUnit("Seconds");
        time.setUnitSymbol("s");
        time.setPresentation(Presentation.CONTINUOUS_INTERVAL);
        coverageEncoder.setMetadataDimension("time", time);
        
        // activate run which is a custom dimension
        final GSDimensionInfoEncoder run=new GSDimensionInfoEncoder(true);
        run.setPresentation(Presentation.LIST);
        run.setUnit("Hours");
        run.setUnitSymbol("h");
        coverageEncoder.setMetadataDimension("run", run,true);
        
        // persiste the changes
        boolean config=publisher.configureCoverage(coverageEncoder, wsName, csname);
        assertTrue(config);
       
    } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE