Fix invalid comparison and optimize construction of CellStyle objects for comparison

Fix copy/paste-errors where object are compared
with itself for "hidden" and "locked".

Integration tests showed that sometimes lots of time is
spent here, so let's try to reduce the number of calls to
getCellStyle().

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1897323 13f79535-47bb-0310-9956-ffa450edef68

poi-examples/src/main/java/org/apache/poi/examples/ss/ExcelComparator.java

@@ -23,6 +23,7 @@ import java.util.*;
 
 import org.apache.poi.ss.usermodel.BorderStyle;
 import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
 import org.apache.poi.ss.usermodel.CellType;
 import org.apache.poi.ss.usermodel.Color;
 import org.apache.poi.ss.usermodel.DateUtil;
@@ -91,7 +92,7 @@ public class ExcelComparator {
         Cell cell;
     }
 
-    private List<String> listOfDifferences = new ArrayList<>();
+    private final List<String> listOfDifferences = new ArrayList<>();
     private final DateFormat dateFormat = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.ROOT);
 
 
@@ -341,12 +342,17 @@ public class ExcelComparator {
      * Checks if cell alignment matches.
      */
     private void isCellAlignmentMatches(Locator loc1, Locator loc2) {
-        if(loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
-        HorizontalAlignment align1 = loc1.cell.getCellStyle().getAlignment();
-        HorizontalAlignment align2 = loc2.cell.getCellStyle().getAlignment();
+        HorizontalAlignment align1 = style1.getAlignment();
+        HorizontalAlignment align2 = style2.getAlignment();
         if (align1 != align2) {
             addMessage(loc1, loc2,
                 "Cell Alignment does not Match ::",
@@ -360,13 +366,19 @@ public class ExcelComparator {
      * Checks if cell border bottom matches.
      */
     private void isCellBorderMatches(Locator loc1, Locator loc2, char borderSide) {
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
-        XSSFCellStyle style1 = ((XSSFCell)loc1.cell).getCellStyle();
-        XSSFCellStyle style2 = ((XSSFCell)loc2.cell).getCellStyle();
         boolean b1, b2;
         String borderName;
         switch (borderSide) {
@@ -482,12 +494,17 @@ public class ExcelComparator {
      * Checks if cell fill pattern matches.
      */
     private void isCellFillPatternMatches(Locator loc1, Locator loc2) {
-        if(loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
-        FillPatternType fill1 = loc1.cell.getCellStyle().getFillPattern();
-        FillPatternType fill2 = loc2.cell.getCellStyle().getFillPattern();
+        FillPatternType fill1 = style1.getFillPattern();
+        FillPatternType fill2 = style2.getFillPattern();
         if (fill1 != fill2) {
             addMessage(loc1, loc2,
                 "Cell Fill pattern does not Match ::",
@@ -501,8 +518,16 @@ public class ExcelComparator {
      * Checks if cell font bold matches.
      */
     private void isCellFontBoldMatches(Locator loc1, Locator loc2) {
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
@@ -510,8 +535,8 @@ public class ExcelComparator {
             return;
         }
 
-        boolean b1 = ((XSSFCell)loc1.cell).getCellStyle().getFont().getBold();
-        boolean b2 = ((XSSFCell)loc2.cell).getCellStyle().getFont().getBold();
+        boolean b1 = ((XSSFCellStyle)style1).getFont().getBold();
+        boolean b2 = ((XSSFCellStyle)style2).getFont().getBold();
         if (b1 != b2) {
             addMessage(loc1, loc2,
                 CELL_FONT_ATTRIBUTES_DOES_NOT_MATCH,
@@ -525,8 +550,16 @@ public class ExcelComparator {
      * Checks if cell font family matches.
      */
     private void isCellFontFamilyMatches(Locator loc1, Locator loc2) {
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
@@ -534,8 +567,8 @@ public class ExcelComparator {
             return;
         }
 
-        String family1 = ((XSSFCell)loc1.cell).getCellStyle().getFont().getFontName();
-        String family2 = ((XSSFCell)loc2.cell).getCellStyle().getFont().getFontName();
+        String family1 = ((XSSFCellStyle)style1).getFont().getFontName();
+        String family2 = ((XSSFCellStyle)style2).getFont().getFontName();
         if (!family1.equals(family2)) {
             addMessage(loc1, loc2, "Cell Font Family does not Match ::", family1, family2);
         }
@@ -559,8 +592,16 @@ public class ExcelComparator {
      * Checks if cell font italics matches.
      */
     private void isCellFontItalicsMatches(Locator loc1, Locator loc2) {
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
@@ -568,8 +609,8 @@ public class ExcelComparator {
             return;
         }
 
-        boolean b1 = ((XSSFCell)loc1.cell).getCellStyle().getFont().getItalic();
-        boolean b2 = ((XSSFCell)loc2.cell).getCellStyle().getFont().getItalic();
+        boolean b1 = ((XSSFCellStyle)style1).getFont().getItalic();
+        boolean b2 = ((XSSFCellStyle)style2).getFont().getItalic();
         if (b1 != b2) {
             addMessage(loc1, loc2,
                 CELL_FONT_ATTRIBUTES_DOES_NOT_MATCH,
@@ -583,8 +624,16 @@ public class ExcelComparator {
      * Checks if cell font size matches.
      */
     private void isCellFontSizeMatches(Locator loc1, Locator loc2) {
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
@@ -592,8 +641,8 @@ public class ExcelComparator {
             return;
         }
 
-        short size1 = ((XSSFCell)loc1.cell).getCellStyle().getFont().getFontHeightInPoints();
-        short size2 = ((XSSFCell)loc2.cell).getCellStyle().getFont().getFontHeightInPoints();
+        short size1 = ((XSSFCellStyle)style1).getFont().getFontHeightInPoints();
+        short size2 = ((XSSFCellStyle)style2).getFont().getFontHeightInPoints();
         if (size1 != size2) {
             addMessage(loc1, loc2,
                 "Cell Font Size does not Match ::",
@@ -607,12 +656,17 @@ public class ExcelComparator {
      * Checks if cell hidden matches.
      */
     private void isCellHiddenMatches(Locator loc1, Locator loc2) {
-        if (loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
-        boolean b1 = loc1.cell.getCellStyle().getHidden();
-        boolean b2 = loc1.cell.getCellStyle().getHidden();
+        boolean b1 = style1.getHidden();
+        boolean b2 = style2.getHidden();
         if (b1 != b2) {
             addMessage(loc1, loc2,
                 "Cell Visibility does not Match ::",
@@ -626,12 +680,17 @@ public class ExcelComparator {
      * Checks if cell locked matches.
      */
     private void isCellLockedMatches(Locator loc1, Locator loc2) {
-        if (loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
-        boolean b1 = loc1.cell.getCellStyle().getLocked();
-        boolean b2 = loc1.cell.getCellStyle().getLocked();
+        boolean b1 = style1.getLocked();
+        boolean b2 = style2.getLocked();
         if (b1 != b2) {
             addMessage(loc1, loc2,
                     "Cell Protection does not Match ::",
@@ -664,8 +723,16 @@ public class ExcelComparator {
     private void isCellUnderLineMatches(Locator loc1, Locator loc2) {
         // TODO: distinguish underline type
 
-        if (!(loc1.cell instanceof XSSFCell) ||
-                loc1.cell.getCellStyle() == null || loc2.cell.getCellStyle() == null) {
+        if (!(loc1.cell instanceof XSSFCell)) {
+            return;
+        }
+
+        CellStyle style1 = loc1.cell.getCellStyle();
+        if (style1 == null) {
+            return;
+        }
+        CellStyle style2 = loc2.cell.getCellStyle();
+        if (style2 == null) {
             return;
         }
 
@@ -673,8 +740,8 @@ public class ExcelComparator {
             return;
         }
 
-        byte b1 = ((XSSFCell)loc1.cell).getCellStyle().getFont().getUnderline();
-        byte b2 = ((XSSFCell)loc2.cell).getCellStyle().getFont().getUnderline();
+        byte b1 = ((XSSFCellStyle)style1).getFont().getUnderline();
+        byte b2 = ((XSSFCellStyle)style2).getFont().getUnderline();
         if (b1 != b2) {
             addMessage(loc1, loc2,
                 CELL_FONT_ATTRIBUTES_DOES_NOT_MATCH,