How to use ClassloaderExecutor class of org.powermock.classloading package

Best Powermock code snippet using org.powermock.classloading.ClassloaderExecutor

Source:ClassloaderExecutor.java

...25/**26 * A ClassLoaderExecutor can run any code in any classloader. E.g. assume you have a classloader27 * called myClassloader and you want to execute a (void) method called myMethod in myObject using this CL:28 * <pre>29 *     ClassloaderExecutor cle = new ClassloaderExecutor(myClassloader);30 *     cle.execute(new Runnable() {31 *          public void run() {32 *             myObject.myMethod();33 *          }34 *     });35 * </pre>36 *37 * What happens is that the entire object graph of myObject is deep-cloned into the <code>myClassloader</code> classloader38 * and then the <code>myObject.myMethod()</code> is executed.39 * <p>40 * You can also execute methods that return something:41 * <pre>42 *     ClassloaderExecutor cle = new ClassloaderExecutor(myClassloader);43 *     MyResult result = cle.execute(new Callable<MyResult>() {44 *          public MyResult call() throws Exception {45 *             return myObject.myMethod();46 *          }47 *     });48 * </pre>49 * Here we imagine that <code>myObject.myMethod()</code> returns an object of type <code>MyResult</code>. Again the entire50 * state will be deep-cloned to  <code>myClassloader</code> and then the <code>myObject.myMethod()</code> is executed.51 * The result of the method call is deep-cloned back into the original classloader (the one that made the call to52 * <code>cle.execute(..)</code>) and is ready for use.53 * </p>54 * <p>55 * Note that the ClassloaderExecutor requires a deep cloner implementing the {@link DeepClonerSPI} present in the class-path.56 * </p>57 */58public class ClassloaderExecutor {59	@DoNotClone60	private final ClassLoader classloader;61	public ClassloaderExecutor(ClassLoader classloader) {62		this.classloader = classloader;63	}64	@SuppressWarnings("unchecked")65	public <T> T execute(Callable<T> callable) {66		assertArgumentNotNull(callable, "callable");67		return (T) execute(callable, Whitebox.getMethod(callable.getClass(), "call"));68	}69	public void execute(Runnable runnable) {70		assertArgumentNotNull(runnable, "runnable");71		execute(runnable, Whitebox.getMethod(runnable.getClass(), "run"));72	}73	private void assertArgumentNotNull(Object object, String argumentName) {74		if (object == null) {75			throw new IllegalArgumentException(argumentName + " cannot be null.");...

Source:PowerMockRule.java

...17import org.junit.rules.MethodRule;18import org.junit.runners.model.FrameworkMethod;19import org.junit.runners.model.Statement;20import org.powermock.api.support.SafeExceptionRethrower;21import org.powermock.classloading.ClassloaderExecutor;22import org.powermock.classloading.SingleClassloaderExecutor;23import org.powermock.classloading.spi.DoNotClone;24import org.powermock.core.MockRepository;25import org.powermock.tests.utils.MockPolicyInitializer;26import org.powermock.tests.utils.TestChunk;27import org.powermock.tests.utils.TestSuiteChunker;28import org.powermock.tests.utils.impl.MockPolicyInitializerImpl;29public class PowerMockRule implements MethodRule {30	private static Class<?> previousTargetClass;31	private static MockPolicyInitializer mockPolicyInitializer;32    @DoNotClone33	private static TestSuiteChunker testSuiteChunker;34	@Override35	public Statement apply(final Statement base, final FrameworkMethod method, final Object target) {36        if (isNotRuleInitialized(target)) {37            init(target);38		}39		return new PowerMockStatement(base, testSuiteChunker.getTestChunk(method.getMethod()), mockPolicyInitializer);40	}41    protected boolean isNotRuleInitialized(Object target) {return testSuiteChunker  == null || previousTargetClass != target.getClass();}42    protected void init(Object target) {43        final Class<?> testClass = target.getClass();44        try {45            mockPolicyInitializer = new MockPolicyInitializerImpl(testClass);46            testSuiteChunker = new PowerMockRuleTestSuiteChunker(testClass);47            previousTargetClass = target.getClass();48        } catch (Exception e) {49            throw new RuntimeException(e);50        }51    }52}53class PowerMockStatement extends Statement {54	private final Statement fNext;55    private final ClassloaderExecutor classloaderExecutor;56	private final MockPolicyInitializer mockPolicyInitializer;57    public PowerMockStatement(Statement fNext, TestChunk testChunk, MockPolicyInitializer mockPolicyInitializer) {58        this.fNext = fNext;59        this.mockPolicyInitializer = mockPolicyInitializer;60        this.classloaderExecutor = new SingleClassloaderExecutor(testChunk.getClassLoader());61    }62    @Override63	public void evaluate() throws Throwable {64		classloaderExecutor.execute(new Runnable() {65			@Override66			public void run() {67				try {68					// Re-executes the policy method that might initialize mocks that 69					// were cleared after the previous statement.70					// This fixes https://github.com/jayway/powermock/issues/58171					mockPolicyInitializer.refreshPolicies(getClass().getClassLoader());72					fNext.evaluate();73				} catch (Throwable e) {74					SafeExceptionRethrower.safeRethrow(e);...

ClassloaderExecutor

Using AI Code Generation

1import org.powermock.classloading.ClassloaderExecutor;2import org.powermock.classloading.ClassloaderExecutor.ClassloaderProvider;3public class ClassloaderExecutorTest {4    public static void main(String[] args) throws Exception {5        ClassloaderExecutor executor = new ClassloaderExecutor(new ClassloaderProvider() {6            public ClassLoader getClassloader() {7                return ClassloaderExecutorTest.class.getClassLoader();8            }9        });10        executor.execute(new Runnable() {11            public void run() {12                System.out.println("Hello World");13            }14        });15    }16}

ClassloaderExecutor

Using AI Code Generation

1public class ClassloaderExecutorTest {2    public static void main(String[] args) {3        ClassLoader classLoader = ClassloaderExecutorTest.class.getClassLoader();4        ClassLoaderExecutor executor = new ClassLoaderExecutor(classLoader);5        executor.execute(new Runnable() {6            public void run() {7                System.out.println("Hello World!");8            }9        });10    }11}

ClassloaderExecutor

Using AI Code Generation

1package com.powermock.demo;2import java.io.File;3import java.io.IOException;4import java.util.ArrayList;5import java.util.List;6import org.powermock.classloading.ClassloaderExecutor;7import org.powermock.classloading.ClassloaderExecutorFactory;8public class ClassloaderExecutorDemo {9    public static void main(String[] args) throws Exception {10        List<File> classpath = new ArrayList<File>();11        classpath.add(new File("C:\\Users\\vijay\\Documents\\workspace\\PowerMock\\target\\classes"));12        classpath.add(new File("C:\\Users\\vijay\\.m2\\repository\\junit\\junit\\4.12\\junit-4.12.jar"));13        classpath.add(new File("C:\\Users\\vijay\\.m2\\repository\\org\\hamcrest\\hamcrest-core\\1.3\\hamcrest-core-1.3.jar"));14        ClassloaderExecutor classloaderExecutor = ClassloaderExecutorFactory.createClassloaderExecutor(classpath);15        try {16            classloaderExecutor.execute(new ClassloaderExecutor.CallbackWithResult() {17                public Object execute() throws Exception {18                    return Class.forName("com.powermock.demo.ClassloaderExecutorDemo").newInstance();19                }20            });21        } catch (Exception e) {22            e.printStackTrace();23        } finally {24            classloaderExecutor.shutdown();25        }26    }27}28    at java.net.URLClassLoader$1.run(Unknown Source)29    at java.net.URLClassLoader$1.run(Unknown Source)30    at java.security.AccessController.doPrivileged(Native Method)31    at java.net.URLClassLoader.findClass(Unknown Source)32    at java.lang.ClassLoader.loadClass(Unknown Source)33    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)34    at java.lang.ClassLoader.loadClass(Unknown Source)35    at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:82)36    at com.powermock.demo.ClassloaderExecutorDemo.main(ClassloaderExecutorDemo.java:35)

ClassloaderExecutor

Using AI Code Generation

1ClassloaderExecutor executor = new ClassloaderExecutor();2executor.execute(new ClassloaderExecutor.ClassloaderCallback() {3public Object execute(ClassLoader classLoader) throws Throwable {4Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");5Object obj = clazz.newInstance();6return obj;7}8});9ClassloaderExecutor executor = new ClassloaderExecutor();10executor.execute(new ClassloaderExecutor.ClassloaderCallback() {11public Object execute(ClassLoader classLoader) throws Throwable {12Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");13Object obj = clazz.newInstance();14return obj;15}16});17ClassloaderExecutor executor = new ClassloaderExecutor();18executor.execute(new ClassloaderExecutor.ClassloaderCallback() {19public Object execute(ClassLoader classLoader) throws Throwable {20Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");21Object obj = clazz.newInstance();22return obj;23}24});25ClassloaderExecutor executor = new ClassloaderExecutor();26executor.execute(new ClassloaderExecutor.ClassloaderCallback() {27public Object execute(ClassLoader classLoader) throws Throwable {28Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");29Object obj = clazz.newInstance();30return obj;31}32});33ClassloaderExecutor executor = new ClassloaderExecutor();34executor.execute(new ClassloaderExecutor.ClassloaderCallback() {35public Object execute(ClassLoader classLoader) throws Throwable {36Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");37Object obj = clazz.newInstance();38return obj;39}40});41ClassloaderExecutor executor = new ClassloaderExecutor();42executor.execute(new ClassloaderExecutor.ClassloaderCallback() {43public Object execute(ClassLoader classLoader) throws Throwable {44Class<?> clazz = classLoader.loadClass("com.example.HelloWorld");45Object obj = clazz.newInstance();46return obj;47}

ClassloaderExecutor

Using AI Code Generation

1ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();2classloaderExecutor.execute(new Runnable() {3    public void run() {4    }5});6ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();7classloaderExecutor.execute(new Callable<V>() {8    public V call() {9    }10});11ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();12classloaderExecutor.execute(new Runnable() {13    public void run() {14    }15}, ClassLoader classLoader);16ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();17classloaderExecutor.execute(new Callable<V>() {18    public V call() {19    }20}, ClassLoader classLoader);21ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();22classloaderExecutor.executeWithClassLoaderOf(Object object, Runnable runnable);23ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();24classloaderExecutor.executeWithClassLoaderOf(Object object, Callable<V> callable);25ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();26classloaderExecutor.executeWithClassLoaderOf(Object object, Runnable runnable, ClassLoader classLoader);27ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();28classloaderExecutor.executeWithClassLoaderOf(Object object, Callable<V> callable, ClassLoader classLoader);29ClassloaderExecutor classloaderExecutor = new ClassloaderExecutor();

ClassloaderExecutor

Using AI Code Generation

1package org.powermock.classloading;2import org.junit.Test;3import org.powermock.reflect.Whitebox;4import static org.junit.Assert.*;5public class ClassloaderExecutorTest {6    public void testExecute() throws Exception {7        Class<?> clazz = ClassloaderExecutor.execute(new ClassLoader() {8        }, "java.lang.String");9        assertEquals("java.lang.String", clazz.getName());10    }11    public void testExecuteWithNullLoader() throws Exception {12        Class<?> clazz = ClassloaderExecutor.execute(null, "java.lang.String");13        assertEquals("java.lang.String", clazz.getName());14    }15    public void testExecuteWithNullClassname() throws Exception {16        Class<?> clazz = ClassloaderExecutor.execute(getClass().getClassLoader(), null);17        assertNull(clazz);18    }19    public void testExecuteWithNullArguments() throws Exception {20        Class<?> clazz = ClassloaderExecutor.execute(null, null);21        assertNull(clazz);22    }23}24package org.powermock.classloading;25import org.junit.Test;26import org.junit.runner.RunWith;27import org.powermock.core.classloader.annotations.PrepareForTest;28import org.powermock.modules.junit4.PowerMockRunner;29import static org.junit.Assert.assertEquals;30import static org.junit.Assert.assertNotNull;31import static org.junit.Assert.assertNull;32import static org.powermock.api.easymock.PowerMock.createMock;33import static org.powermock.api.easymock.PowerMock.expectNew;34import static org.powermock.api.easymock.PowerMock.replay;35import static org.powermock.api.easymock.PowerMock.verify;36import static org.powermock.reflect.Whitebox.getInternalState;37@RunWith(PowerMockRunner.class)38@PrepareForTest(ClassloaderExecutor.class)39public class ClassloaderExecutorTest {40    public void testExecute() throws Exception {41        final ClassLoader loader = createMock(ClassLoader.class);42        final String className = "java.lang.String";43        expectNew(ClassLoader.class).andReturn(loader);44        expectNew(ClassLoader.class).andReturn(loader);45        expectNew(ClassLoader

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