Support for the SUMIF formula and non-alpha string literals

PR:
 Also fixes Bug #17582
Obtained from:
Submitted by:
 Test case for non-alpha string literals provided by ext-jens.riis@nokia.com (Jens Riis)
Reviewed by:
 Thanks Avik for your FormulaParser help


git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@353028 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/model/FormulaParser.java

@@ -214,6 +214,14 @@ public class FormulaParser {
         return  (c ==' ' || c== TAB);
     }
     
+    /**
+     * Determines special characters;primarily in use for definition of string literals
+     * @param c
+     * @return boolean
+     */
+    private boolean IsSpecialChar(char c) {
+    	return (c == '>' || c== '<' || c== '=' || c=='&' || c=='[' || c==']');
+    }
     
 
     /** Skip Over Leading White Space */
@@ -253,10 +261,8 @@ public class FormulaParser {
        converting to uppercase; used for literals */
     private String GetNameAsIs() {
         StringBuffer Token = new StringBuffer();
-        if (!IsAlpha(look)) {
-            Expected("Name");
-        }
-        while (IsAlNum(look) || IsWhite(look)) {
+		
+		while (IsAlNum(look) || IsWhite(look) || IsSpecialChar(look)) {
             Token = Token.append(look);
             GetChar();
         }

src/testcases/org/apache/poi/hssf/model/TestFormulaParser.java

@@ -217,10 +217,39 @@ public class TestFormulaParser extends TestCase {
 		FuncVarPtg funcPtg = (FuncVarPtg)asts[6];
 		assertEquals("Arguments", 2, funcPtg.getNumberOfOperands());
 		
-						
 		
+	}
+
+	public void testSumIf() {
+		String function ="SUMIF(A1:A5,\">4000\",B1:B5)";
+		FormulaParser fp = new FormulaParser(function, null);
+		fp.parse();
+		Ptg[] asts = fp.getRPNPtg();
+		assertEquals("4 Ptgs expected", 4, asts.length);
 		
 	}
+	 
+	/**
+	 * Bug Reported by xt-jens.riis@nokia.com (Jens Riis)
+	 * Refers to Bug <a href="http://nagoya.apache.org/bugzilla/show_bug.cgi?id=17582">#17582</a>
+	 *
+	 */
+	public void testNonAlphaFormula(){
+		String currencyCell = "F3";
+		String function="\"TOTAL[\"&"+currencyCell+"&\"]\"";
+
+		FormulaParser fp = new FormulaParser(function, null);
+		fp.parse();
+		Ptg[] asts = fp.getRPNPtg();
+		assertEquals("5 ptgs expected", 5, asts.length);
+		assertTrue ("Ptg[0] is a string", (asts[0] instanceof StringPtg));
+		StringPtg firstString = (StringPtg)asts[0];		
+		
+		assertEquals("TOTAL[", firstString.getValue());
+		//the PTG order isn't 100% correct but it still works - dmui
+		
+					
+	}	 
 	    
      public static void main(String [] args) {
         System.out.println("Testing org.apache.poi.hssf.record.formula.FormulaParser");

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

@@ -55,23 +55,15 @@
 
 package org.apache.poi.hssf.usermodel;
 
-import junit.framework.TestCase;
-
-import org.apache.poi.poifs.filesystem.POIFSFileSystem;
-import org.apache.poi.hssf.model.Sheet;
-import org.apache.poi.hssf.record.Record;
-import org.apache.poi.hssf.record.BOFRecord;
-import org.apache.poi.hssf.record.EOFRecord;
-import org.apache.poi.hssf.util.CellReference;
-
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
-
-import java.util.List;
-import java.util.Iterator;
+import java.io.IOException;
 import java.util.Date;
-import java.util.GregorianCalendar;
+
+import junit.framework.TestCase;
+
+import org.apache.poi.hssf.util.CellReference;
 
 /**
  * @author Andrew C. Oliver (acoliver at apache dot org)
@@ -985,6 +977,58 @@ extends TestCase {
 		assertTrue("length of nestedIf file is zero", (nestedIf.length()>0));             
     }
 
+	public void testSumIf()
+		throws java.io.IOException
+	{
+		String readFilename = System.getProperty("HSSF.testdata.path");		
+		String function ="SUMIF(A1:A5,\">4000\",B1:B5)";
+		
+		File inFile = new File(readFilename+"/sumifformula.xls");
+		FileInputStream in = new FileInputStream(inFile);
+		HSSFWorkbook wb = new HSSFWorkbook(in);
+		in.close();
+		
+		HSSFSheet        s      = wb.getSheetAt(0);
+		HSSFRow          r      = s.getRow(0);
+		HSSFCell         c      = r.getCell((short)2);
+		assertEquals(function, c.getCellFormula());
+		
+
+		File file = File.createTempFile("testSumIfFormula",".xls");
+		FileOutputStream out    = new FileOutputStream(file);
+		wb     = new HSSFWorkbook();
+		s      = wb.createSheet();
+		
+		r = s.createRow((short)0);
+		c=r.createCell((short)0); c.setCellValue((double)1000);
+		c=r.createCell((short)1); c.setCellValue((double)1);
+		
+		
+		r = s.createRow((short)1);
+		c=r.createCell((short)0); c.setCellValue((double)2000);
+		c=r.createCell((short)1); c.setCellValue((double)2);
+
+		r = s.createRow((short)2);
+		c=r.createCell((short)0); c.setCellValue((double)3000);
+		c=r.createCell((short)1); c.setCellValue((double)3);
+
+		r = s.createRow((short)3);
+		c=r.createCell((short)0); c.setCellValue((double)4000);
+		c=r.createCell((short)1); c.setCellValue((double)4);
+
+		r = s.createRow((short)4);
+		c=r.createCell((short)0); c.setCellValue((double)5000);
+		c=r.createCell((short)1); c.setCellValue((double)5);
+		
+		r = s.getRow(0);
+		c=r.createCell((short)2); c.setCellFormula(function);
+			
+		wb.write(out);				
+		out.close();
+		
+		assertTrue("sumif file doesnt exists", (file.exists()));
+		assertTrue("sumif == 0 bytes", file.length() > 0);
+	}
     
     public static void main(String [] args) {
         System.out