access the result of string formulas

getStringValue on HSSFCell now returns the formula result if it's a string formula


git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/branches/REL_2_BRANCH@353325 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/aggregates/FormulaRecordAggregate.java

@@ -266,5 +266,10 @@ public class FormulaRecordAggregate
 
       return true;
    }
+   
+   public String getStringValue() {
+        if(stringRecord==null) return null;
+        return stringRecord.getString();
+   }
 
 }

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

@@ -326,6 +326,7 @@ public class HSSFCell
 
             case CELL_TYPE_FORMULA :
                 cellValue = (( FormulaRecordAggregate ) cval).getFormulaRecord().getValue();
+                stringValue=((FormulaRecordAggregate) cval).getStringValue();
                 break;
 
             case CELL_TYPE_BOOLEAN :
@@ -797,6 +798,7 @@ public class HSSFCell
     /**
      * get the value of the cell as a string - for numeric cells we throw an exception.
      * For blank cells we return an empty string.
+     * For formulaCells that are not string Formulas, we return empty String
      */
 
     public String getStringCellValue()
@@ -820,6 +822,10 @@ public class HSSFCell
             throw new NumberFormatException(
                 "You cannot get a string value from an error cell");
         }
+        if (cellType == CELL_TYPE_FORMULA) 
+        {
+            if (stringValue==null) return "";
+        }
         return stringValue;
     }
 

src/testcases/org/apache/poi/hssf/usermodel/TestFormulas.java

@@ -1106,6 +1106,20 @@ extends TestCase {
         assertEquals(4d, d2.getNumericCellValue(), 1e-9);
     }
 
+    public void testStringFormulaRead() throws IOException {
+        File dir = new File(System.getProperty("HSSF.testdata.path"));
+        File xls = new File(dir, "StringFormulas.xls");
+        FileInputStream in = new FileInputStream(xls);
+        HSSFWorkbook w;
+        try {
+            w = new HSSFWorkbook(in);
+        } finally {
+            in.close();
+        }
+        HSSFCell c = w.getSheetAt(0).getRow(0).getCell((short)0);
+        assertEquals("String Cell value","XYZ",c.getStringCellValue());
+    }
+    
     public static void main(String [] args) {
         System.out
         .println("Testing org.apache.poi.hssf.usermodel.TestFormulas");