public static Object callBeanMethod()

in src/main/java/org/apache/bsf/util/EngineUtils.java [134:212]
59 lines of code
24 McCabe index (conditional complexity)

    public static Object callBeanMethod(final Object bean, final String methodName, final Object[] args) throws BSFException {
        Class[] argTypes = null;
        // determine arg types. note that a null argtype
        // matches any object type

        if (args != null) {
            argTypes = new Class[args.length];
            for (int i = 0; i < args.length; i++) {
                argTypes[i] = (args[i] == null) ? null : args[i].getClass();
            }
        }

        // we want to allow a static call to occur on an object, similar
        // to what Java allows. So isStaticOnly is set to false.
        final boolean isStaticOnly = false;
        final Class beanClass = (bean instanceof Class) ? (Class) bean : bean.getClass();

        // now try to call method with the right signature
        try {
            Method m;
            try {
                m = MethodUtils.getMethod(beanClass, methodName, argTypes, isStaticOnly);
            } catch (final NoSuchMethodException e) {
                // ok, so that didn't work - now try converting any primitive
                // wrapper types to their primitive counterparts
                try {
                    // if args is null the NullPointerException will get caught
                    // below and the right thing'll happen .. ugly but works
                    for (int i = 0; i < args.length; i++) {
                        if (args[i] instanceof Number) {
                            if (args[i] instanceof Byte) {
                                argTypes[i] = byte.class;
                            } else if (args[i] instanceof Integer) {
                                argTypes[i] = int.class;
                            } else if (args[i] instanceof Long) {
                                argTypes[i] = long.class;
                            } else if (args[i] instanceof Float) {
                                argTypes[i] = float.class;
                            } else if (args[i] instanceof Double) {
                                argTypes[i] = double.class;
                            } else if (args[i] instanceof Short) {
                                argTypes[i] = short.class;
                            }
                        } else if (args[i] instanceof Boolean) {
                            argTypes[i] = boolean.class;
                        } else if (args[i] instanceof Character) {
                            argTypes[i] = char.class;
                        }
                    }

                    m = MethodUtils.getMethod(beanClass, methodName, argTypes, isStaticOnly);
                } catch (final Exception e2) {
                    // throw the original
                    throw e;
                }
            }

            // call it, and return the result
            try {
                return m.invoke(bean, args);
            } catch (final Exception e) // 2003-02-23, --rgf, maybe an IllegalAccessException?
            {
                if (e instanceof IllegalAccessException && bMethodHasSetAccessible && Modifier.isPublic(m.getModifiers())) // if a public method allow access to
                                                                                                                           // it
                {
                    m.setAccessible(true); // allow unconditional access to method
                    return m.invoke(bean, args);
                }
                // re-throw the exception
                throw e;
            }

        } catch (final Exception e) {
            // something went wrong while invoking method
            final Throwable t = (e instanceof InvocationTargetException) ? ((InvocationTargetException) e).getTargetException() : null;
            throw new BSFException(BSFException.REASON_OTHER_ERROR,
                    "[EngineUtils.callBeanMethod()] method invocation failed: " + e + ((t == null) ? "" : (" target exception: " + t)), t);
        }
    }