Hi all,
According to [1] you need a custom URLClassLoader and
@requiresDependencyResolution in order to load a class from the
classpath. So I have in my Mojo:
/**
* @goal run
* @phase generate-sources
* @requiresDependencyResolution compile (I also tried runtime)
*/
public class RunMojo extends AbstractMojo {
:
public void execute() throws MojoExecutionException {
:
try {
final File rootDir = new File("target/classes");
if (!rootDir.exists()) throw new IllegalStateException("Does not exist.");
final Deque<File> queue = new LinkedList<File>();
queue.add(rootDir);
while (!queue.isEmpty()) {
final File dir = queue.poll();
for (final File f : dir.listFiles())
if (f.isFile()) System.out.println(f); else if
(f.isDirectory()) queue.add(f);
}
final URL targetClasses = new URL("file", null, file.getAbsolutePath());
System.out.println(targetClasses);
final URLClassLoader classLoader = new URLClassLoader(new URL[]
{ targetClasses });
final Class<?> mainClass = classLoader.loadClass("org.example.Main");
getLog().info("Main.class=" + mainClass);
} catch (final Exception e) {
throw new MojoExecutionException(e.getMessage(), e);
}
}
:
}
This yields a ClassNotFoundException. Note that org.example.Main has
no dependencies (it's simply an implementation of "Hello World!").
I can see that I made no errors in the URL, Main.class is available
and where I expect it to be.
What am I doing wrong?
Cheers,
Hilco
[1] https://cwiki.apache.org/MAVEN/maven-3x-class-loading.html
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