Spring Framework example source code file (AnnotationTypeFilterTests.java)

This example Spring Framework source code file (AnnotationTypeFilterTests.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 - Spring Framework tags/keywords

annotation, annotationtypefilter, annotationtypefilter, exception, inheritedannotation, metadatareader, metadatareader, metadatareaderfactory, metadatareaderfactory, simplemetadatareaderfactory, someclassmarkedwithnoninheritedannotation, somecomponent, somenoncandidateclass, string, string

The Spring Framework AnnotationTypeFilterTests.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.core.type;

import java.lang.annotation.Inherited;

import junit.framework.TestCase;

import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.SimpleMetadataReaderFactory;
import org.springframework.core.type.filter.AnnotationTypeFilter;
import org.springframework.stereotype.Component;

/**
 * @author Ramnivas Laddad
 * @author Juergen Hoeller
 */
public class AnnotationTypeFilterTests extends TestCase {
	
	public void testDirectAnnotationMatch() throws Exception {
		MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory();
		String classUnderTest = "org.springframework.core.type.AnnotationTypeFilterTests$SomeComponent";
		MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(classUnderTest);

		AnnotationTypeFilter filter = new AnnotationTypeFilter(InheritedAnnotation.class);
		assertTrue(filter.match(metadataReader, metadataReaderFactory));
		ClassloadingAssertions.assertClassNotLoaded(classUnderTest);
	}

	public void testInheritedAnnotationFromInterfaceDoesNotMatch() throws Exception {
		MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory();
		String classUnderTest = "org.springframework.core.type.AnnotationTypeFilterTests$SomeSubClassOfSomeComponentInterface";
		MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(classUnderTest);

		AnnotationTypeFilter filter = new AnnotationTypeFilter(InheritedAnnotation.class);
		// Must fail as annotation on interfaces should not be considered a match
		assertFalse(filter.match(metadataReader, metadataReaderFactory));
		ClassloadingAssertions.assertClassNotLoaded(classUnderTest);
	}
	
	public void testInheritedAnnotationFromBaseClassDoesMatch() throws Exception {
		MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory();
		String classUnderTest = "org.springframework.core.type.AnnotationTypeFilterTests$SomeSubClassOfSomeComponent";
		MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(classUnderTest);

		AnnotationTypeFilter filter = new AnnotationTypeFilter(InheritedAnnotation.class);
		assertTrue(filter.match(metadataReader, metadataReaderFactory));
		ClassloadingAssertions.assertClassNotLoaded(classUnderTest);
	}

	public void testNonInheritedAnnotationDoesNotMatch() throws Exception {
		MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory();
		String classUnderTest = "org.springframework.core.type.AnnotationTypeFilterTests$SomeSubclassOfSomeClassMarkedWithNonInheritedAnnotation";
		MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(classUnderTest);

		AnnotationTypeFilter filter = new AnnotationTypeFilter(NonInheritedAnnotation.class);
		// Must fail as annotation isn't inherited
		assertFalse(filter.match(metadataReader, metadataReaderFactory));
		ClassloadingAssertions.assertClassNotLoaded(classUnderTest);
	}
	
	public void testNonAnnotatedClassDoesntMatch() throws Exception {
		MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory();
		String classUnderTest = "org.springframework.core.type.AnnotationTypeFilterTests$SomeNonCandidateClass";
		MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(classUnderTest);

		AnnotationTypeFilter filter = new AnnotationTypeFilter(Component.class);
		assertFalse(filter.match(metadataReader, metadataReaderFactory));
		ClassloadingAssertions.assertClassNotLoaded(classUnderTest);
	}


	// We must use a standalone set of types to ensure that no one else is loading them
	// and interfering with ClassloadingAssertions.assertClassNotLoaded()

	@Inherited
	private static @interface InheritedAnnotation {
	}


	@InheritedAnnotation
	private static class SomeComponent {
	}


	@InheritedAnnotation
	private static interface SomeComponentInterface {
	}


	private static class SomeSubClassOfSomeComponentInterface implements SomeComponentInterface {
	}


	private static class SomeSubClassOfSomeComponent extends SomeComponent {
	}


	private static @interface NonInheritedAnnotation {
	}


	@NonInheritedAnnotation
	private static class SomeClassMarkedWithNonInheritedAnnotation {
	}


	private static class SomeSubclassOfSomeClassMarkedWithNonInheritedAnnotation extends SomeClassMarkedWithNonInheritedAnnotation {
	}


	private static class SomeNonCandidateClass {
	}

}