JavaHT GetAllMembers
How do I Get All Methods/Fields/Constructors of a Class?
- First, you need to be in a Javac context, see previous section for more information.
- Then, you need to find javax.lang.model.element.TypeElement you want to analyze. See com.sun.source.tree.Trees.getElement(TreePath) and javax.lang.model.util.Elements.getTypeElement(String). You can get Trees and Elements from org.netbeans.api.java.source.CompilationInfo.
- Finally, use Element.getEnclosedElements() to find out the elements enclosed by the class - for classes, this returns all members (methods, fields and inner classes) of the class. You can then use ElementFilter to filter out specific kind of member: methods, constructors, fields and inner classes.
Example:
protected void performAction(Node[] activatedNodes) {
DataObject dataObject = (DataObject) activatedNodes[0].getLookup().lookup(DataObject.class);
JavaSource js = JavaSource.forFileObject(dataObject.getPrimaryFile());
try {
js.runUserActionTask(new Task<CompilationController>() {
public void run(CompilationController parameter) throws IOException {
parameter.toPhase(Phase.ELEMENTS_RESOLVED);
new MemberVisitor(parameter).scan(parameter.getCompilationUnit(), null);
}
}, true);
}
catch (IOException e) {
Logger.getLogger("global").log(Level.SEVERE, e.getMessage(), e);
}
}
private static class MemberVisitor extends TreePathScanner<Void, Void> {
private CompilationInfo info;
public MemberVisitor(CompilationInfo info) {
this.info = info;
}
@Override
public Void visitClass(ClassTree t, Void v) {
Element el = info.getTrees().getElement(getCurrentPath());
if (el == null) {
System.err.println("Cannot resolve class!");
}
else {
TypeElement te = (TypeElement) el;
System.err.println("Resolved class: " + te.getQualifiedName().toString());
//XXX: only as an example, uses toString on element, which should be used only for debugging
System.err.println("enclosed methods: " + ElementFilter.methodsIn(te.getEnclosedElements()));
System.err.println("enclosed types: " + ElementFilter.typesIn(te.getEnclosedElements()));
}
return null;
}
}
