wiki-export/wiki-content/JavaHT_GetAllMembers.xml

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  <page>
    <title>JavaHT GetAllMembers</title>
    <id>9412</id>
    <revision>
      <id>55764</id>
      <timestamp>2012-07-10T14:37:39Z</timestamp>
      <contributor>
        <username>Javydreamercsw</username>
        <id>2603</id>
      </contributor>
      <minor/>
      <comment>/* How do I Get All Methods/Fields/Constructors of a Class? */</comment>
      <text xml:space="preserve">__NOTOC__
====How do I Get All Methods/Fields/Constructors of a Class?====

* First, you need to be in a Javac context, see [[JavaHT_GetIntoJavacContext | previous section]] for more information.
* Then, you need to find &lt;tt&gt;javax.lang.model.element.TypeElement&lt;/tt&gt; you want to analyze. See &lt;tt&gt;com.sun.source.tree.Trees.getElement(TreePath)&lt;/tt&gt; and &lt;tt&gt;javax.lang.model.util.Elements.getTypeElement(String)&lt;/tt&gt;. You can get &lt;tt&gt;Trees&lt;/tt&gt; and &lt;tt&gt;Elements&lt;/tt&gt; from &lt;tt&gt;org.netbeans.api.java.source.CompilationInfo&lt;/tt&gt;.
* Finally, use &lt;tt&gt;Element.getEnclosedElements()&lt;/tt&gt; 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 &lt;tt&gt;ElementFilter&lt;/tt&gt; to filter out specific kind of member: methods, constructors, fields and inner classes.

Example:
&lt;pre&gt;
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&lt;CompilationController&gt;() {
            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&lt;Void, Void&gt; {

    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;
    }

}
&lt;/pre&gt;</text>
    </revision>
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