findbugs: fix SF_SWITCH_FALLTHROUGH warnings

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1748088 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/EmbeddedObjectRefSubRecord.java

@@ -269,7 +269,8 @@ public final class EmbeddedObjectRefSubRecord extends SubRecord implements Clone
 		switch(idOffset - (pos - 6)) { // 6 for 3 shorts: sid, dataSize, idOffset
 			case 1:
 				out.writeByte(field_4_unknownByte == null ? 0x00 : field_4_unknownByte.intValue());
-				pos ++;
+				pos++;
+				break;
 			case 0:
 				break;
 			default:

src/java/org/apache/poi/hssf/usermodel/HSSFCell.java

@@ -457,6 +457,7 @@ public class HSSFCell implements Cell {
      *        precalculated value, for numerics we'll set its value. For other types we
      *        will change the cell to a numeric cell and set its value.
      */
+    @SuppressWarnings("fallthrough")
     public void setCellValue(double value) {
         if(Double.isInfinite(value)) {
             // Excel does not support positive/negative infinities,
@@ -474,6 +475,7 @@ public class HSSFCell implements Cell {
             switch (_cellType) {
                 default:
                     setCellType(CELL_TYPE_NUMERIC, false, row, col, styleIndex);
+                    // fall through
                 case CELL_TYPE_NUMERIC:
                     (( NumberRecord ) _record).setValue(value);
                     break;
@@ -743,6 +745,7 @@ public class HSSFCell implements Cell {
      *        precalculated value, for booleans we'll set its value. For other types we
      *        will change the cell to a boolean cell and set its value.
      */
+    @SuppressWarnings("fallthrough")
     public void setCellValue(boolean value) {
         int row=_record.getRow();
         short col=_record.getColumn();
@@ -751,6 +754,7 @@ public class HSSFCell implements Cell {
         switch (_cellType) {
             default:
                 setCellType(CELL_TYPE_BOOLEAN, false, row, col, styleIndex);
+                // fall through
             case CELL_TYPE_BOOLEAN:
                 (( BoolErrRecord ) _record).setValue(value);
                 break;
@@ -768,6 +772,7 @@ public class HSSFCell implements Cell {
      *        its value. For other types we will change the cell to an error
      *        cell and set its value.
      */
+    @SuppressWarnings("fallthrough")
     public void setCellErrorValue(byte errorCode) {
         int row=_record.getRow();
         short col=_record.getColumn();
@@ -775,6 +780,7 @@ public class HSSFCell implements Cell {
         switch (_cellType) {
             default:
                 setCellType(CELL_TYPE_ERROR, false, row, col, styleIndex);
+                // fall through
             case CELL_TYPE_ERROR:
                 (( BoolErrRecord ) _record).setValue(errorCode);
                 break;

src/java/org/apache/poi/hssf/usermodel/HSSFWorkbook.java

@@ -1744,6 +1744,7 @@ public final class HSSFWorkbook extends POIDocument implements org.apache.poi.ss
      * @see #PICTURE_TYPE_JPEG
      * @see #PICTURE_TYPE_DIB
      */
+    @SuppressWarnings("fallthrough")
     @Override
     public int addPicture(byte[] pictureData, int format)
     {

src/java/org/apache/poi/ss/formula/atp/YearFrac.java

@@ -65,6 +65,7 @@ final class YearFrac implements FreeRefFunction {
 			switch(args.length) {
 				case 3:
 					basis = evaluateIntArg(args[2], srcCellRow, srcCellCol);
+					// fall through
 				case 2:
 					break;
 				default:

src/java/org/apache/poi/ss/formula/functions/FinanceFunction.java

@@ -87,6 +87,7 @@ public abstract class FinanceFunction implements Function3Arg, Function4Arg {
         }
     }
 
+    @SuppressWarnings("fallthrough")
     protected double evaluate(double[] ds) throws EvaluationException {
         // All finance functions have 3 to 5 args, first 4 are numbers, last is boolean
         // default for last 2 args are 0.0 and false
@@ -98,8 +99,10 @@ public abstract class FinanceFunction implements Function3Arg, Function4Arg {
         switch(ds.length) {
             case 5:
                 arg4 = ds[4];
+                // fall through
             case 4:
                 arg3 = ds[3];
+                // fall through
             case 3:
                 break;
             default:

src/java/org/apache/poi/ss/formula/functions/Offset.java

@@ -161,6 +161,7 @@ public final class Offset implements Function {
 		}
 	}
 
+	@SuppressWarnings("fallthrough")
 	public ValueEval evaluate(ValueEval[] args, int srcCellRow, int srcCellCol) {
 		if(args.length < 3 || args.length > 5) {
 			return ErrorEval.VALUE_INVALID;

src/java/org/apache/poi/util/HexRead.java

@@ -101,6 +101,7 @@ public class HexRead
         return readData(stream, section);
     }
 
+    @SuppressWarnings("fallthrough")
     static public byte[] readData( InputStream stream, int eofChar )
             throws IOException
     {
@@ -137,6 +138,7 @@ public class HexRead
                 case 'E':
                 case 'F':
                     baseChar = 'A';
+                    // fall through
                 case 'a':
                 case 'b':
                 case 'c':

src/resources/devtools/findbugs-filters.xml

@@ -82,6 +82,40 @@
 			<Field name="pitch" />
 		</Or>
 	</Match>
+	<Match>
+		<Class name="org.apache.poi.hssf.usermodel.HSSFCell"/>
+		<Or>
+			<Method name="setCellValue" params="double" />
+			<Method name="setCellValue" params="boolean" />
+			<Method name="setCellErrorValue" params="byte" />
+		</Or>
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
+	<Match>
+		<Class name="org.apache.poi.hssf.usermodel.HSSFWorkbook"/>
+		<Method name="addPicture" />
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
+	<Match>
+		<Class name="org.apache.poi.ss.formula.atp.YearFrac"/>
+		<Method name="evaluate" />
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
+	<Match>
+		<Class name="org.apache.poi.ss.formula.functions.FinanceFunction"/>
+		<Method name="evaluate" />
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
+	<Match>
+		<Class name="org.apache.poi.ss.formula.functions.Offset"/>
+		<Method name="evaluate" />
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
+	<Match>
+		<Class name="org.apache.poi.util.HeadRead"/>
+		<Method name="readData" params="java.io.InputStream,int" />
+		<Bug pattern="SF_SWITCH_FALLTHROUGH" />
+	</Match>
 	
 
     <!-- invalid performance issues - e.g. see #57840 -->