Selecting while statements using a reference as condition

FindWhileStatements.java

public class FindWhileStatements {

    public static void main(String[] args) {
        String code = "class A {\n" +
                "\tstatic boolean f = true;\n" +
                "\tvoid methodFoo() {\n" +
                "\t\twhile (f) {\n" +
                "\t\t\tmethodFoo();\n" +
                "\t\t}\n" +
                "\t}\n" +
                "}";
        new NodeIterator(node -> {
            if (node instanceof WhileStmt) {
                WhileStmt whileStmt = (WhileStmt)node;
                if (whileStmt.getCondition() instanceof NameExpr) {
                    System.out.println("FOUND!");
                }
            }
            return true;
        })
                .explore(JavaParser.parse(code));
    }
}

NodeIterator.java

package me.tomassetti.support;

import com.github.javaparser.ast.Node;

public class NodeIterator {
    public interface NodeHandler {
        boolean handle(Node node);
    }

    private NodeHandler nodeHandler;

    public NodeIterator(NodeHandler nodeHandler) {
        this.nodeHandler = nodeHandler;
    }

    public void explore(Node node) {
        if (nodeHandler.handle(node)) {
            for (Node child : node.getChildNodes()) {
                explore(child);
            }
        }
    }
}