netbeans.apache.org/src/content/wiki/JavaHT_GetAllMembers.asciidoc

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= JavaHT_GetAllMembers
:jbake-type: wiki
:jbake-tags: wiki, devfaq, needsreview
:jbake-status: published
:keywords: Apache NetBeans wiki JavaHT_GetAllMembers
:description: Apache NetBeans wiki JavaHT_GetAllMembers
:toc: left
:toc-title:
:syntax: true

==== How do I Get All Methods/Fields/Constructors of a Class?

* First, you need to be in a Javac context, see link:JavaHT_GetIntoJavacContext.asciidoc[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:

[source,java]
----

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;
    }

}
----

=== Apache Migration Information

The content in this page was kindly donated by Oracle Corp. to the
Apache Software Foundation.

This page was exported from link:http://wiki.netbeans.org/JavaHT[http://wiki.netbeans.org/JavaHT] GetAllMembers , 
that was last modified by NetBeans user Javydreamercsw 
on 2012-07-10T14:37:39Z.


*NOTE:* This document was automatically converted to the AsciiDoc format on 2018-02-07, and needs to be reviewed.