Can't compile XMLBean generated classes with Maven due to 'ñ"

Question

I am working on a project and I can't compile that generates XMLBeans from a WSDL.

The files are generated ok, but when I want to compile the project, I have problems with a few classes.

The main problem, I guess, is that the name of the class has an ñ, AñoDocument.java and it doesn't compile.

[INFO] Compiling 998 source files to D:\workspace3\MyProject\my_module\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] \workspace3\MyProject\my_module\src\main\java\com\mycompany\schema\AñoDocument.java:[17,18] illegal character: \65533
[ERROR] \workspace3\MyProject\my_module\src\main\java\com\mycompany\schema\AñoDocument.java:[20,63] illegal character: \65533
[ERROR] \workspace3\MyProject\my_module\src\main\java\com\mycompany\schema\AñoDocument.java:[20,77] <identifier> expected
[ERROR] \workspace3\MyProject\my_module\src\main\java\com\mycompany\schema\AñoDocument.java:[20,82] = expected
[ERROR] \workspace3\MyProject\my_module\src\main\java\com\mycompany\schema\AñoDocument.java:[20,83] ';' expected
....

In Eclipse -> Project -> Properties -> Resource -> Text Encoding I have checked "Inherit from container (Cp1252)".

This is the POM of my project:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
      <artifactId>MyProject</artifactId>
      <groupId>com.mycompany</groupId>
      <version>1.0</version>
    </parent>

    <groupId>com.mycompany</groupId>
    <artifactId>my_module</artifactId>
    <version>1.0</version>
    <name>my_module</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>xmlbeans-maven-plugin</artifactId>
                <version>2.2.0</version>
                <executions>
                    <execution>
                       <phase>generate-sources</phase>
                        <goals>
                            <goal>xmlbeans</goal>
                        </goals>
                    </execution>
                </executions>
                <inherited>true</inherited>
                <configuration>
                    <schemaDirectory>downloads</schemaDirectory>
                    <noVDoc>true</noVDoc>
                    <noJavac>true</noJavac>
                    <sourceGenerationDirectory>src/main/java</sourceGenerationDirectory>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <configuration>
                    <filesets>     
                        <fileset>
                        <directory>src/main/java</directory>
                            <includes>
                                <include>**/*.java</include>
                            </includes>
                        </fileset>
                    </filesets>
                </configuration>
            </plugin> 
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlbeans</groupId>
            <artifactId>xmlbeans</artifactId>
            <version>2.2.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlbeans</groupId>
            <artifactId>xmlbeans-xpath</artifactId>
            <version>2.2.0</version>
        </dependency>   

        <dependency>
            <groupId>net.sf.saxon</groupId>
            <artifactId>saxon</artifactId>
            <version>8.7</version>
        </dependency>

    </dependencies>

</project>

Does any one have any idea about how can I do to fix this?

Answer 1

I don't think the problem is with the ñ character itself. This is a perfectly valid character for a class name, as demonstrated by the following test class (which I know prints true on JDK 1.6).

public class Main {
    public static void main(String[] args) {
         System.out.println(Character.isJavaIdentifierPart('ñ'));
    }
}

You are saving the file in Cp1252, which is compatible with UTF-8 for ASCII characters, but not for non-ASCII. Then you tell maven that your source files are encoded in UTF-8. This causes maven to read the ñ character incorrectly, which appears in your build when it interprets ñ as the character \65533 - the replacement character. Try to change the Resource encoding to UTF-8 under Eclipse -> Project -> Properties -> Resource -> Text Encoding

Answer 2

From the Java Language Spec:

The Java letters include uppercase and lowercase ASCII Latin letters A-Z (\u0041-\u005a), and a-z (\u0061-\u007a), and, for historical reasons, the ASCII underscore (_, or \u005f) and dollar sign ($, or \u0024). The $ character should be used only in mechanically generated source code or, rarely, to access preexisting names on legacy systems.

In other words, it's illegal to have an n-tilde on a class name. Which means that many tools are likely to be unhappy with it in a Java filename as well.

Update See comments below. Looks like this is completely wrong. Would delete it, but the comments are worthwhile.

Answer 3

I solved in this way: 1) close eclipse, 2) mvn clean, 3) mvn compile