Esempio n. 1
0
  private static CtMethod delegator0(CtMethod delegate, CtClass declaring)
      throws CannotCompileException, NotFoundException {
    MethodInfo deleInfo = delegate.getMethodInfo2();
    String methodName = deleInfo.getName();
    String desc = deleInfo.getDescriptor();
    ConstPool cp = declaring.getClassFile2().getConstPool();
    MethodInfo minfo = new MethodInfo(cp, methodName, desc);
    minfo.setAccessFlags(deleInfo.getAccessFlags());

    ExceptionsAttribute eattr = deleInfo.getExceptionsAttribute();
    if (eattr != null) minfo.setExceptionsAttribute((ExceptionsAttribute) eattr.copy(cp, null));

    Bytecode code = new Bytecode(cp, 0, 0);
    boolean isStatic = Modifier.isStatic(delegate.getModifiers());
    CtClass deleClass = delegate.getDeclaringClass();
    CtClass[] params = delegate.getParameterTypes();
    int s;
    if (isStatic) {
      s = code.addLoadParameters(params, 0);
      code.addInvokestatic(deleClass, methodName, desc);
    } else {
      code.addLoad(0, deleClass);
      s = code.addLoadParameters(params, 1);
      code.addInvokespecial(deleClass, methodName, desc);
    }

    code.addReturn(delegate.getReturnType());
    code.setMaxLocals(++s);
    code.setMaxStack(s < 2 ? 2 : s); // for a 2-word return value
    minfo.setCodeAttribute(code.toCodeAttribute());
    return new CtMethod(minfo, declaring);
  }
 /**
  * Client proxies are equal to other client proxies for the same bean.
  *
  * <p>The corresponding java code: <code>
  * return other instanceof MyProxyClassType.class
  * </code>
  */
 @Override
 protected MethodInfo generateEqualsMethod(ClassFile proxyClassType) {
   MethodInfo method =
       new MethodInfo(proxyClassType.getConstPool(), "equals", "(Ljava/lang/Object;)Z");
   method.setAccessFlags(AccessFlag.PUBLIC);
   Bytecode b = new Bytecode(proxyClassType.getConstPool());
   b.addAload(1);
   b.addInstanceof(proxyClassType.getName());
   b.add(Opcode.IRETURN);
   b.setMaxLocals(2);
   b.setMaxStack(1);
   method.setCodeAttribute(b.toCodeAttribute());
   return method;
 }
 /** Client proxies use the following hashCode: <code>MyProxyName.class.hashCode()</code> */
 @Override
 protected MethodInfo generateHashCodeMethod(ClassFile proxyClassType) {
   MethodInfo method = new MethodInfo(proxyClassType.getConstPool(), "hashCode", "()I");
   method.setAccessFlags(AccessFlag.PUBLIC);
   Bytecode b = new Bytecode(proxyClassType.getConstPool());
   // MyProxyName.class.hashCode()
   int classLocation = proxyClassType.getConstPool().addClassInfo(proxyClassType.getName());
   b.addLdc(classLocation);
   // now we have the class object on top of the stack
   b.addInvokevirtual("java.lang.Object", "hashCode", "()I");
   // now we have the hashCode
   b.add(Opcode.IRETURN);
   b.setMaxLocals(1);
   b.setMaxStack(1);
   method.setCodeAttribute(b.toCodeAttribute());
   return method;
 }