Java 8 ClassDefinition - top ranked examples from Open Source projects

These code examples were ranked by Codota’s semantic indexing as the best open source examples for Java 8 ClassDefinition class.

This code example shows how to use the following methods:
	 */ 
	public static boolean redefineClassEL(Class clazz, byte[] barr){
		Instrumentation inst = InstrumentationFactory.getInstance();
	    if(inst!=null && inst.isRedefineClassesSupported()) {
	    	try { 
	        	inst.redefineClasses(new ClassDefinition(clazz,barr));
				return true; 
			}  
	    	catch (Throwable t) {t.printStackTrace();}
	    } 
	    return false; 
	} 
 
	public static void redefineClass(Class clazz, byte[] barr) throws ClassNotFoundException, UnmodifiableClassException{
		Instrumentation inst = InstrumentationFactory.getInstance();
	    inst.redefineClasses(new ClassDefinition(clazz,barr));
	} 
 
	public static boolean isSupported() { 
		Instrumentation inst = InstrumentationFactory.getInstance();
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This code example shows how to use the following methods:
            try { 
                final Class<?> originalProxyClass = loader.loadClass(ct.getName());
                try { 
                    ByteArrayOutputStream bs = new ByteArrayOutputStream();
                    ct.write(new DataOutputStream(bs));
                    Agent.redefine(new ClassDefinition[]{new ClassDefinition(originalProxyClass, bs.toByteArray())}, new AddedClass[0]);
                    return originalProxyClass;
                } catch (Exception e) {
                    throw new RuntimeException(e);
                } 
            } catch (ClassNotFoundException e) {
                //it has not actually been loaded yet 
                return ClassFileUtils.toClass(ct, loader, domain);
            } 
        } 
        return ClassFileUtils.toClass(ct, loader, domain);
    } 
 
} 
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This code example shows how to use the following methods:
        assertTrue(caught);
 
        // Test that a null class throws NullPointerException 
        caught = false;
        try { 
            new ClassDefinition(null, new byte[] {1, 2, 3});
        } catch (NullPointerException npe) {
            caught = true;
        } 
        assertTrue(caught);
 
        // Test that a null byte array throws NullPointerException 
        caught = false;
        try { 
            new ClassDefinition(DummyClass.class, null);
        } catch (NullPointerException npe) {
            caught = true;
        } 
        assertTrue(caught);
    } 
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This code example shows how to use the following methods:
    instrumentation = inst;
  } 
 
  public static boolean hotSwap(final Class<?> mutateMe, final byte[] bytes) { // NO_UCD
 
    final ClassDefinition[] definitions = { new ClassDefinition(mutateMe, bytes) };
 
    try { 
      instrumentation.redefineClasses(definitions);
 
      return true; 
    } catch (final ClassNotFoundException e) {
      // swallow 
    } catch (final UnmodifiableClassException e) {
      // swallow 
    } catch (final java.lang.VerifyError e) {
      // swallow 
    } catch (final java.lang.InternalError e) {
      // swallow 
    } 
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See Code Examples for Java 8 ClassDefinition Methods: