Struts example source code file (AnnotationUtilsTest.java)

This example Struts source code file (AnnotationUtilsTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

annotatedelement, annotation, annotationutilstest, collection, dummyclass, dummyclass, dummyclassext, exception, exception, myannotation, myannotation2, myannotation2, reflection, suppresswarnings, suppresswarnings, testcase, util

The Struts AnnotationUtilsTest.java source code

package com.opensymphony.xwork2.util;

import junit.framework.TestCase;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.AnnotatedElement;
import java.util.Collection;

/**
 * @author Dan Oxlade, dan d0t oxlade at gmail d0t c0m
 */
public class AnnotationUtilsTest extends TestCase {


    public void testIsAnnotatedByWithoutAnnotationArgsReturnsFalse() throws Exception {

        assertFalse(AnnotationUtils.isAnnotatedBy(DummyClass.class));
        assertFalse(AnnotationUtils.isAnnotatedBy(DummyClass.class.getMethod("methodWithAnnotation")));

    }

    @SuppressWarnings("unchecked")
    public void testIsAnnotatedByWithSingleAnnotationArgMatchingReturnsTrue() throws Exception {

        assertTrue(AnnotationUtils.isAnnotatedBy(DummyClass.class.getMethod("methodWithAnnotation"), MyAnnotation.class));

    }

    @SuppressWarnings("unchecked")
    public void testIsAnnotatedByWithMultiAnnotationArgMatchingReturnsTrue() throws Exception {

        assertFalse(AnnotationUtils.isAnnotatedBy(DummyClass.class.getMethod("methodWithAnnotation"), Deprecated.class));
        assertTrue(AnnotationUtils.isAnnotatedBy(DummyClass.class.getMethod("methodWithAnnotation"), MyAnnotation.class, Deprecated.class));
        assertTrue(AnnotationUtils.isAnnotatedBy(DummyClass.class.getMethod("methodWithAnnotation"), Deprecated.class, MyAnnotation.class));

    }

    public void testGetAnnotedMethodsWithoutAnnotationArgs() throws Exception {

        Collection<? extends AnnotatedElement> ans = AnnotationUtils.getAnnotatedMethods(DummyClass.class);

        assertTrue(ans.size() == 1);

        assertEquals(ans.iterator().next(), DummyClass.class.getMethod("methodWithAnnotation"));

    }

    @SuppressWarnings("unchecked")
    public void testGetAnnotatedMethodsWithAnnotationArgs() throws Exception {

        Collection<? extends AnnotatedElement> ans = AnnotationUtils.getAnnotatedMethods(DummyClass.class, Deprecated.class);
        assertTrue(ans.isEmpty());

        ans = AnnotationUtils.getAnnotatedMethods(DummyClass.class, Deprecated.class, MyAnnotation.class);
        assertEquals(1, ans.size());

        ans = AnnotationUtils.getAnnotatedMethods(DummyClass.class, MyAnnotation.class);
        assertEquals(1, ans.size());

        ans = AnnotationUtils.getAnnotatedMethods(DummyClass.class, MyAnnotation.class, MyAnnotation2.class);
        assertEquals(1, ans.size());

        ans = AnnotationUtils.getAnnotatedMethods(DummyClassExt.class, MyAnnotation.class, MyAnnotation2.class);
        assertEquals(2, ans.size());

    }

    /**
     * *****************************************************************
     * <p/>
     * TEST CLASSES
     */
    private static class DummyClass {

        public DummyClass() {
        }

        @MyAnnotation
        public void methodWithAnnotation() {
        }

    }

    @Retention(RetentionPolicy.RUNTIME)
    public @interface MyAnnotation {
    }

    private static final class DummyClassExt extends DummyClass {

        @MyAnnotation2
        public void anotherAnnotatedMethod() {
        }

    }

    @Retention(RetentionPolicy.RUNTIME)
    public @interface MyAnnotation2 {
    }

}