support cell getAddress

Author: pjfanning

src/main/java/com/github/pjfanning/xlsx/impl/StreamingCell.java

@@ -340,6 +340,11 @@ public LocalDateTime getLocalDateTimeCellValue() {
     return rawContents == null ? null : DateUtil.getLocalDateTime(getNumericCellValue(), use1904Dates);
   }
 
+  @Override
+  public CellAddress getAddress() {
+    return new CellAddress(this);
+  }
+
   /* Not supported */
 
   /**
@@ -460,14 +465,6 @@ public void setAsActiveCell() {
     throw new NotSupportedException("update operations are not supported");
   }
 
-  /**
-   * Not supported
-   */
-  @Override
-  public CellAddress getAddress() {
-    throw new NotSupportedException();
-  }
-
   /**
    * Update operations are not supported
    */

src/test/java/com/github/pjfanning/xlsx/StreamingReaderTest.java

@@ -643,6 +643,8 @@ public void testIteration() throws Exception {
         for(Cell c : r) {
           assertNotNull("cell row is set", c.getRow());
           assertEquals(r, c.getRow());
+          assertNotNull("cell address is set", c.getAddress());
+          assertEquals(r.getRowNum(), c.getAddress().getRow());
         }
       }
     }