Fix sonar issues

Author: fugerit79

src/main/java/org/fugerit/java/github/issue/export/GithubIssueExport.java

@@ -328,14 +328,6 @@ public static Object buildModel( String data, Class c ) throws JsonProcessingExc
 		return objectMapper.readValue( data , c );
 	}
 
-	public static String getValue( Object val ) {
-		String res = null;
-		if ( val != null ) {
-			res = String.valueOf( val );
-		}
-		return res;
-	}
-	
 	private static void handleExcel( GithubIssueInfo info, List<List<String>> lines ) {
 		SafeFunction.apply( () -> {
 			String xlsFile = info.getProperty( ARG_XLSFILE );

src/main/java/org/fugerit/java/github/issue/export/helper/PoiHelper.java

@@ -20,6 +20,11 @@ public class PoiHelper {
 
 	private PoiHelper() {}
 
+	/*
+	 * https://support.microsoft.com/en-gb/office/excel-specifications-and-limits-1672b34d-7043-467e-8e27-269d656771c3
+	 */
+	public static final int MAX_XLS_CELL_LENGTH = 32767;
+	
 	/*
 	 * Use with caution, bad performance
 	 */
@@ -41,18 +46,20 @@ public static CellStyle getHeaderStyle( Workbook workbook ) {
 		return style;
 	}
 
+	public static String prepareCell( String currentCell ) {
+		if ( "null".equalsIgnoreCase( currentCell ) ) {
+			currentCell = "";
+		} else if ( currentCell.length() > MAX_XLS_CELL_LENGTH ) {
+			currentCell = currentCell.substring( 0, 32000 )+"[...]";
+		}
+		return currentCell;
+	}
+	
 	public static void addRow( String[] values, int index, Sheet sheet, CellStyle style) {
 		Row row = sheet.createRow( index );
 		for ( int k=0; k<values.length; k++ ) {
 			Cell cell = row.createCell( k );
-			String currentCell = values[k];
-			if ( currentCell.length() > 32767 ) {
-				currentCell = currentCell.substring( 0, 32000 )+"[...]";
-			}
-			if ( "null".equalsIgnoreCase( currentCell ) ) {
-				currentCell = "";
-			}
-			cell.setCellValue( currentCell );
+			cell.setCellValue( prepareCell( values[k] ) );
 			if ( style != null ) {
 				cell.setCellStyle( style );	
 			}