/*
* Copyright 2011-2013 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.data.hadoop.mapreduce;
import org.junit.Test;
import org.springframework.beans.BeanUtils;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.util.ClassUtils;
import test.SomeClass;
import static org.junit.Assert.*;
/**
* @author Costin Leau
*/
public class ClassUtilsTest {
@Test
public void testParentLastClassLoading() throws Exception {
Resource jar = new DefaultResourceLoader().getResource("class-v1.jar");
SomeClass v2 = new SomeClass();
assertEquals("Class-v2", System.getProperty(SomeClass.LAST_LOADED));
assertNotNull(System.getProperty(SomeClass.CLASS_LOADED + ".2"));
// use v2 CL as a parent
Object obj = loadFromJar(jar, v2.getClass().getClassLoader(), "test.SomeClass");
// check the jar classes are preferred
assertEquals("Class-v1", System.getProperty(SomeClass.LAST_LOADED));
assertNotNull(System.getProperty(SomeClass.CLASS_LOADED + ".1"));
assertFalse(v2.getClass().equals(obj.getClass()));
}
// disabled test
public void testNestedClass() throws Exception {
Resource jar = new DefaultResourceLoader().getResource("jar-with-classes.jar");
Object obj = loadFromJar(jar, getClass().getClassLoader(), "test.SomeNestedClass");
// check the jar classes are preferred
assertEquals("NestedClass", System.getProperty(SomeClass.LAST_LOADED));
assertNotNull(System.getProperty(SomeClass.CLASS_LOADED + ".nested"));
assertFalse(org.springframework.util.ClassUtils.isPresent(obj.getClass().getName(), getClass().getClassLoader()));
}
@Test
public void testNestedLib() throws Exception {
Resource jar = new DefaultResourceLoader().getResource("jar-with-libs.jar");
Object obj = loadFromJar(jar, getClass().getClassLoader(), "test.SomeLibClass");
// check the jar classes are preferred
assertEquals("LibClass", System.getProperty(SomeClass.LAST_LOADED));
assertNotNull(System.getProperty(SomeClass.CLASS_LOADED + ".lib"));
assertFalse(org.springframework.util.ClassUtils.isPresent(obj.getClass().getName(), getClass().getClassLoader()));
}
@Test
public void testMainClassDiscovery() throws Exception {
Resource jar = new DefaultResourceLoader().getResource("some-tool.jar");
String mainClass = ExecutionUtils.mainClass(jar);
assertEquals("test.SomeTool", mainClass);
}
private static Object loadFromJar(Resource jar, ClassLoader parentCL, String className) {
ClassLoader cl = ExecutionUtils.createParentLastClassLoader(jar, parentCL, null);
Class<?> clazz = ClassUtils.resolveClassName(className, cl);
return BeanUtils.instantiateClass(clazz);
}
}