bug 56781: disallow names with symbols, except underscore, period, and backslash

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1749293 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -17,6 +17,8 @@
 
 package org.apache.poi.hssf.usermodel;
 
+import java.util.regex.Pattern;
+
 import org.apache.poi.hssf.model.HSSFFormulaParser;
 import org.apache.poi.hssf.model.InternalWorkbook;
 import org.apache.poi.hssf.record.NameCommentRecord;
@@ -30,6 +32,11 @@ import org.apache.poi.ss.usermodel.Name;
  * 'named range' or name of a user defined function.
  */
 public final class HSSFName implements Name {
+    private static final Pattern isValidName = Pattern.compile(
+            "[\\p{IsAlphabetic}_\\\\]" +
+            "[\\p{IsAlphabetic}0-9_.\\\\]*",
+            Pattern.CASE_INSENSITIVE);
+    
     private HSSFWorkbook _book;
     private NameRecord _definedNameRec;
     private NameCommentRecord _commentRec;
@@ -155,10 +162,8 @@ public final class HSSFName implements Name {
 
     private static void validateName(String name){
         if(name.length() == 0)  throw new IllegalArgumentException("Name cannot be blank");
-
-        char c = name.charAt(0);
-        if(!(c == '_' || Character.isLetter(c)) || name.indexOf(' ') != -1) {
-            throw new IllegalArgumentException("Invalid name: '"+name+"'; Names must begin with a letter or underscore and not contain spaces");
+        if(!isValidName.matcher(name).matches()) {
+            throw new IllegalArgumentException("Invalid name: '"+name+"'");
         }
     }
 

src/java/org/apache/poi/ss/usermodel/Name.java

@@ -55,7 +55,7 @@ public interface Name {
     /**
      * Get the sheets name which this named range is referenced to
      *
-     * @return sheet name, which this named range refered to
+     * @return sheet name, which this named range referred to
      */
     String getSheetName();
 

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

@@ -17,6 +17,10 @@
 package org.apache.poi.xssf.usermodel;
 
 import org.apache.poi.ss.formula.ptg.Ptg;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import org.apache.poi.ss.formula.FormulaParser;
 import org.apache.poi.ss.formula.FormulaType;
 import org.apache.poi.ss.usermodel.Name;
@@ -53,6 +57,11 @@ import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDefinedName;
  */
 public final class XSSFName implements Name {
     
+    private static final Pattern isValidName = Pattern.compile(
+            "[\\p{IsAlphabetic}_\\\\]" +
+            "[\\p{IsAlphabetic}0-9_.\\\\]*",
+            Pattern.CASE_INSENSITIVE);
+
     /**
      * A built-in defined name that specifies the workbook's print area
      */
@@ -347,9 +356,8 @@ public final class XSSFName implements Name {
     
     private static void validateName(String name){
         if(name.length() == 0)  throw new IllegalArgumentException("Name cannot be blank");
-        char c = name.charAt(0);
-        if(!(c == '_' || Character.isLetter(c)) || name.indexOf(' ') != -1) {
-            throw new IllegalArgumentException("Invalid name: '"+name+"'; Names must begin with a letter or underscore and not contain spaces");
+        if (!isValidName.matcher(name).matches()) {
+            throw new IllegalArgumentException("Invalid name: '"+name+"'");
         }
     }
 }

src/testcases/org/apache/poi/ss/usermodel/BaseTestNamedRange.java

@@ -25,6 +25,7 @@ import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.List;
 
 import org.apache.poi.ss.ITestDataProvider;
@@ -677,4 +678,47 @@ public abstract class BaseTestNamedRange {
         
         wb.close();
     }
+    
+    //@Ignore
+    @Test
+    public void test56781() throws IOException {
+        Workbook wb = _testDataProvider.createWorkbook();
+        
+        Name name = wb.createName();
+        for (String valid : Arrays.asList(
+                "Hello",
+                "number1",
+                "_underscore",
+                "p.e.r.o.i.d.s",
+                "\\Backslash",
+                "Backslash\\"
+                )) {
+            name.setNameName(valid);
+        }
+        
+        try {
+            name.setNameName("");
+            fail("expected exception: (blank)");
+        } catch (final IllegalArgumentException e) {
+            assertEquals("Name cannot be blank", e.getMessage());
+        }
+        
+        for (String invalid : Arrays.asList(
+                "1number",
+                "Sheet1!A1",
+                "Exclamation!",
+                "Has Space",
+                "Colon:",
+                "A-Minus",
+                "A+Plus",
+                "Dollar$")) {
+            try {
+                name.setNameName(invalid);
+                fail("expected exception: " + invalid);
+            } catch (final IllegalArgumentException e) {
+                assertEquals("Invalid name: '" + invalid + "'", e.getMessage());
+            }
+        }
+        
+    }
 }