How to get all packages from an Eclipse Plug-in? - eclipse

Question

// Eclipse PDE 2022-09
// JDK17
// I get the ClassLoader of org.eclipse.swt
ClassLoader classLoader = ......
// Try to get all packages from it
Package packages[] = classLoader.getDefinedPackages() ;
for ( Package pkg : packages ) {
println( pkg ) ;
}
// But some packages are missing from the results, like "org.eclipse.swt.awt".
In this scenario, how can I get all the packages ？

Answer 1

This is my way getAllClassName( SWTBundle ) ;
public record Package( String packageName , List<String> classes , Bundle bundle ){
public Class<?> loadClass(String className) throws ClassNotFoundException {
if( !classes.contains(className) ) {
throw new ClassNotFoundException("not found " + className) ;
}
return bundle.loadClass( packageName + "." + className ) ;
}
#Override
public int hashCode() {
return Objects.hash(packageName);
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Package other = (Package) obj;
return Objects.equals(packageName, other.packageName);
}
}
public Stream<Package> getAllClassName(Bundle bundle) throws BundleException {
BundleWiring bundleWiring = bundle.adapt(BundleWiring.class) ;
if( bundleWiring == null ) {
throw new BundleException( "BundleWiring is null" ) ;
}
Collection<String> resources = bundleWiring.listResources("/", "*.class", BundleWiring.LISTRESOURCES_RECURSE);
List<Package> packageList = new ArrayList<>();
for (String resource : resources) {
String className = FilenameUtils.getBaseName( resource ) ;
String packageName = FilenameUtils.getPathNoEndSeparator( resource ).replace('/','.') ;
int index = packageList.indexOf(new Package(packageName,null,null)) ;
ArrayList<String> classes = null ;
if( index == -1 ) {
classes = new ArrayList<>() ;
packageList.add( new Package(packageName,classes,bundle) ) ;
}else {
classes = (ArrayList<String>)packageList.get(index).classes ;
}
classes.add( className ) ;
}
return packageList.stream().sorted( (a,b) -> a.packageName.compareTo(b.packageName) ) ;
}