Example usage for java.lang.instrument ClassFileTransformer ClassFileTransformer

Introduction

In this page you can find the example usage for java.lang.instrument ClassFileTransformer ClassFileTransformer.

Prototype

ClassFileTransformer

Source Link

Usage

From source file:org.eclipse.virgo.kernel.userregion.internal.equinox.EquinoxOsgiFrameworkTests.java

@Test
public void testAddClassFileTransformer() throws Exception {
    Bundle bundle = installSpringCore(this.framework);
    ClassLoader bundleClassLoader = this.framework.getBundleClassLoader(bundle);
    assertNotNull(bundleClassLoader);/*from w ww.  j  av  a  2s .  c  o m*/
    InstrumentableClassLoader icl = (InstrumentableClassLoader) bundleClassLoader;
    final AtomicInteger count = new AtomicInteger(0);
    icl.addClassFileTransformer(new ClassFileTransformer() {

        public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
                ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
            count.incrementAndGet();
            return null;
        }

    });
    bundle.loadClass("org.springframework.core.JdkVersion");
    assertEquals(1, count.get());
}

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