bench.anno.Test.java Source code

Introduction

Here is the source code for bench.anno.Test.java

Source

/**
 * Copyright (C) 2010-2012 Andrei Pozolotin <Andrei.Pozolotin@gmail.com>
 *
 * All rights reserved. Licensed under the OSI BSD License.
 *
 * http://www.opensource.org/licenses/bsd-license.php
 */
package bench.anno;

import java.util.List;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.AnnotationNode;
import org.objectweb.asm.tree.ClassNode;

public class Test {

    /**
     * @param args
     */
    public static void main(final String[] args) throws Exception {

        // ASM Tree API
        final ClassNode klazNode = new ClassNode();

        // Read the class byte code from stream
        // final ClassReader klazReader = new ClassReader(
        // ClassLoader
        // .getSystemResourceAsStream("bench/anno/Source.class"));

        final ClassReader klazReader = new ClassReader(Source.class.getName());

        klazReader.accept(klazNode, 0);

        System.out.println("Class Name : " + klazNode.name);
        System.out.println("Source File : " + klazNode.sourceFile);

        // Annotations with RetentionPolicy.CLASS
        // @Retention(RetentionPolicy.CLASS)
        System.out.println("\n==Invisible Annotations==");
        printAnnotation(klazNode.invisibleAnnotations);

        // Annotations with RetentionPolicy.RUNTIME
        // @Retention(RetentionPolicy.RUNTIME)
        System.out.println("\n==Visible Annotations==");
        printAnnotation(klazNode.visibleAnnotations);

        System.out.println("\n obj : " + Object.class);
        System.out.println("\n name : " + klazNode.name);
        System.out.println("\n super name : " + klazNode.superName);

    }

    static void printAnnotation(final List annotationList) {

        if (annotationList != null && !annotationList.isEmpty()) {

            AnnotationNode annoNode = null;

            for (final Object annotation : annotationList) {

                annoNode = (AnnotationNode) annotation;

                System.out.println("Annotation Descriptor : " + annoNode.desc);
                System.out.println("Annotation attribute pairs : " + annoNode.values);

                final AnnotationVisitor visitor = new AnnotationVisitor(0) {
                    @Override
                    public void visit(final String arg0, final Object arg1) {

                    }

                    @Override
                    public AnnotationVisitor visitAnnotation(final String arg0, final String arg1) {
                        return null;
                    }

                    @Override
                    public AnnotationVisitor visitArray(final String arg0) {
                        return null;
                    }

                    @Override
                    public void visitEnd() {

                    }

                    @Override
                    public void visitEnum(final String arg0, final String arg1, final String arg2) {

                    }

                };

                // annoNode.accept(visitor);

            }

        } else {

            System.out.println("No annotations found..");

        }

    }

}