Upper case conversion of special characters causes javac error

When a character has no Unicode upper case equivalent, and it is mapped to upper case by NameUtil.java, the conversion returns an invalid character. This causes the compilation of the generated classes to fail. A sample xsd that causes the error, the javac output, and diff of a suggested fix follow.

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Sample XSD that causes the error:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
elementFormDefault="qualified"
attributeFormDefault="unqualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Unit" type="unit_list"/>
<xs:simpleType name="unit_list">
<xs:restriction base="xs:string">
<xs:enumeration value="g/dl"/>
<xs:enumeration value="µg/dl"/>
<xs:enumeration value="µg/L"/>
<xs:enumeration value="g/ml"/>
<xs:enumeration value="pg/µL"/>
<xs:enumeration value="No unit"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>

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Here's the error from javac after scomp:

C:\>scomp -out test.jar test.xsd
Time to build schema type system: 0.781 seconds
Time to generate code: 0.081 seconds
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:24: <identifier> expected
static final Enum ?G_DL = Enum.forString("╡g/dl");
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:24: = expected
static final Enum ?G_DL = Enum.forString("╡g/dl");
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:25: <identifier> expected
static final Enum ?G_L = Enum.forString("╡g/L");
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:25: = expected
static final Enum ?G_L = Enum.forString("╡g/L");
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:27: = expected
static final Enum PG_?_L = Enum.forString("pg/╡L");
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:31: = expected
static final int INT_?G_DL = Enum.INT_?G_DL;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:32: = expected
static final int INT_?G_L = Enum.INT_?G_L;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:34: = expected
static final int INT_PG_?L = Enum.INT_PG?_L;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:69: ';' expected
static final int INT_?G_DL = 2;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:70: ';' expected
static final int INT_?G_L = 3;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:72: ';' expected
static final int INT_PG_?_L = 5;
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:81: : expected
new Enum("╡g/dl", INT_?G_DL),
^
C:\..\Temp\xbean16323.d\src\noNamespace\UnitList.java:86: illegal start of expression
}
^
13 errors

BUILD FAILED

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On my own copy of the XMLBeans source I've fixed the problem by altering NameUtil.java to check for a successful conversion to upper case, and replace any offending characters with underscores. In case it would be useful here's a diff of the changes:

C:\WebsphereStuff\xmlbeans\source\trunk\src\common\org\apache\xmlbeans\impl\comm
on>svn diff
Index: NameUtil.java
===================================================================
— NameUtil.java (revision 154882)
+++ NameUtil.java (working copy)
@@ -555,9 +555,8 @@
for(int j = 0 ; j < len ; j++)

{ char c = buf.charAt(j); - buf.setCharAt(j, Character.toUpperCase(c)); - }

-
+ buf.setCharAt(j, safeToUpperCase(c));
+ }
return buf.toString();
}

@@ -638,7 +637,7 @@
return s;

StringBuffer buf = new StringBuffer(s);

• buf.setCharAt(0, Character.toUpperCase(buf.charAt(0)));
  + buf.setCharAt(0, safeToUpperCase(buf.charAt(0)));
  return buf.toString();
  }

@@ -776,4 +775,17 @@

{ return javaNames.contains(word); }

+
+ public static char safeToUpperCase(char c) {
+ Character upperCaseC = new Character(Character.toUpperCase(c));
+ Character lowerCaseC = new Character(Character.toLowerCase(upperCaseC.charValue()));
+ if(!lowerCaseC.equals(new Character(c)))
+ //if we cannot get back to the lower case, then the character has no upper case form
+ //replace with underscore
+

{ + upperCaseC = new Character(USCORE); + }

+ return upperCaseC.charValue();
+ }
+
}