fix lgtm issues

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1842216 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/model/StylesTable.java

@@ -98,7 +98,7 @@ public class StylesTable extends POIXMLDocumentPart implements Styles {
             if (num < 0) {
                 throw new IllegalArgumentException("Maximum Number of Data Formats must be greater than or equal to 0");
             } else {
-                throw new IllegalStateException("Cannot set the maximum number of data formats less than the current quantity." +
+                throw new IllegalStateException("Cannot set the maximum number of data formats less than the current quantity. " +
                         "Data formats must be explicitly removed (via StylesTable.removeNumberFormat) before the limit can be decreased.");
             }
         }
@@ -316,7 +316,7 @@ public class StylesTable extends POIXMLDocumentPart implements Styles {
             short nextKey = (short) (numberFormats.lastKey() + 1);
             if (nextKey < 0) {
                 throw new IllegalStateException(
-                        "Cowardly avoiding creating a number format with a negative id." +
+                        "Cowardly avoiding creating a number format with a negative id. " +
                         "This is probably due to arithmetic overflow.");
             }
             formatIndex = (short) Math.max(nextKey, FIRST_USER_DEFINED_NUMBER_FORMAT_ID);

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFCell.java

@@ -491,10 +491,13 @@ public final class XSSFCell implements Cell {
                 return cell.getCellFormula(fpb);
             }
         }
-        if (f.getT() == STCellFormulaType.SHARED) {
+        if (f == null) {
+            return null;
+        } else if (f.getT() == STCellFormulaType.SHARED) {
             return convertSharedFormula((int)f.getSi(), fpb == null ? XSSFEvaluationWorkbook.create(getSheet().getWorkbook()) : fpb);
+        } else {
+            return f.getStringValue();
         }
-        return f.getStringValue();
     }
 
     /**

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFClientAnchor.java

@@ -18,7 +18,6 @@
 package org.apache.poi.xssf.usermodel;
 
 import org.apache.poi.ss.usermodel.ClientAnchor;
-import org.apache.poi.ss.usermodel.ClientAnchor.AnchorType;
 import org.apache.poi.util.Internal;
 import org.apache.poi.util.Units;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTPoint2D;
@@ -154,12 +153,6 @@ public class XSSFClientAnchor extends XSSFAnchor implements ClientAnchor {
 //        this.cell2 = calcCell(sheet, cell1, size.getCx(), size.getCy());
     }
     
-    /**
-     *
-     * @param sheet
-     * @param cell starting point and offsets (may be zeros)
-     * @param size dimensions to calculate relative to starting point
-     */
     private CTMarker calcCell(CTMarker cell, long w, long h) {
         CTMarker c2 = CTMarker.Factory.newInstance();
         

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFComment.java

@@ -54,7 +54,7 @@ public class XSSFComment implements Comment {
 
         // we potentially need to adjust the column/row information in the shape
         // the same way as we do in setRow()/setColumn()
-        if(vmlShape != null && vmlShape.sizeOfClientDataArray() > 0) {
+        if(comment != null && vmlShape != null && vmlShape.sizeOfClientDataArray() > 0) {
             CellReference ref = new CellReference(comment.getRef());
             CTClientData clientData = vmlShape.getClientDataArray(0);
             clientData.setRowArray(0, new BigInteger(String.valueOf(ref.getRow())));
@@ -70,7 +70,7 @@ public class XSSFComment implements Comment {
      */
     @Override
     public String getAuthor() {
-        return _comments.getAuthor((int) _comment.getAuthorId());
+        return _comments.getAuthor(_comment.getAuthorId());
     }
 
     /**
@@ -80,9 +80,7 @@ public class XSSFComment implements Comment {
      */
     @Override
     public void setAuthor(String author) {
-        _comment.setAuthorId(
+        _comment.setAuthorId(_comments.findAuthor(author));
-                _comments.findAuthor(author)
-        );
     }
 
     /**

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java

@@ -2262,8 +2262,8 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
         }
     }
 
-    private void unsetCollapsed(boolean collapsed, CTCol ci) {
+    private void unsetCollapsed(Boolean collapsed, CTCol ci) {
-        if (collapsed) {
+        if (collapsed != null && collapsed.booleanValue()) {
             ci.setCollapsed(collapsed);
         } else {
             ci.unsetCollapsed();
@@ -2410,7 +2410,7 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
         boolean endHidden = false;
         int endOfOutlineGroupIdx = findEndOfColumnOutlineGroup(idx);
         CTCol[] colArray = cols.getColArray();
-        if (endOfOutlineGroupIdx < colArray.length) {
+        if (endOfOutlineGroupIdx < (colArray.length - 1)) {
             CTCol nextInfo = colArray[endOfOutlineGroupIdx + 1];
             if (isAdjacentBefore(colArray[endOfOutlineGroupIdx], nextInfo)) {
                 endLevel = nextInfo.getOutlineLevel();
@@ -2900,7 +2900,7 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
                 //            "Got srcRows[" + (index-1) + "]=Row " + prevRow.getRowNum() + ", srcRows[" + index + "]=Row " + curRow.getRowNum() + ".");
                 // FIXME: assumes row objects belong to non-null sheets and sheets belong to non-null workbooks.
             } else if (srcStartRow.getSheet().getWorkbook() != curRow.getSheet().getWorkbook()) {
-                throw new IllegalArgumentException("All rows in srcRows must belong to the same sheet in the same workbook." +
+                throw new IllegalArgumentException("All rows in srcRows must belong to the same sheet in the same workbook. " +
                         "Expected all rows from same workbook (" + srcStartRow.getSheet().getWorkbook() + "). " +
                         "Got srcRows[" + index + "] from different workbook (" + curRow.getSheet().getWorkbook() + ").");
             } else if (srcStartRow.getSheet() != curRow.getSheet()) {