code: @Override
      public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
          String methodName = method.getName();
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.entry(this, tc, methodName, args);
          Object r = null;
          try {
              if (args == null || args.length == 0) {
                  if ("canRegisterSynchronization".equals(methodName))
                      r = canRegisterSynchronization();
                  else if ("getCurrentStatus".equals(methodName))
                      r = getCurrentStatus();
                  else if ("hashCode".equals(methodName))
                      r = System.identityHashCode(this);
                  else if ("retrieveTransactionManager".equals(methodName))
                      r = retrieveTransactionManager();
                  else if ("retrieveUserTransaction".equals(methodName))
                      r = retrieveUserTransaction();
                  else if ("toString".equals(methodName))
                      r = new StringBuilder(getClass().getName()).append('@').append(Integer.toHexString(System.identityHashCode(this))).toString();
              } else {
                  if ("equals".equals(methodName))
                      r = proxy == args[0]; // assumes one proxy per invocation handler
                  else if ("getTransactionIdentifier".equals(methodName))
                      r = getTransactionIdentifier((Transaction) args[0]);
                  else if ("registerSynchronization".equals(methodName))
                      registerSynchronization((Synchronization) args[0]);
              }
          } catch (Throwable x) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
                  Tr.exit(this, tc, methodName, x);
              throw x;
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.exit(this, tc, methodName, r);
          return r;
      }
docs: Invokes our implementation for methods of org.hibernate.engine.transaction.jta.platform.spi.JtaPlatform