private Object invokeMethod()

in src/main/java/org/apache/commons/beanutils2/PropertyUtilsBean.java [1269:1325]
51 lines of code
11 McCabe index (conditional complexity)

    private Object invokeMethod(
                        final Method method,
                        final Object bean,
                        final Object[] values)
                            throws
                                IllegalAccessException,
                                InvocationTargetException {
        if (bean == null) {
            throw new IllegalArgumentException("No bean specified " +
                "- this should have been checked before reaching this method");
        }

        try {

            return method.invoke(bean, values);

        } catch (final NullPointerException | IllegalArgumentException cause) {
            // JDK 1.3 and JDK 1.4 throw NullPointerException if an argument is
            // null for a primitive value (JDK 1.5+ throw IllegalArgumentException)
            final StringBuilder valueString = new StringBuilder();
            if (values != null) {
                for (int i = 0; i < values.length; i++) {
                    if (i>0) {
                        valueString.append(", ");
                    }
                    if (values[i] == null) {
                        valueString.append("<null>");
                    } else {
                        valueString.append(values[i].getClass().getName());
                    }
                }
            }
            final StringBuilder expectedString = new StringBuilder();
            final Class<?>[] parTypes = method.getParameterTypes();
            if (parTypes != null) {
                for (int i = 0; i < parTypes.length; i++) {
                    if (i > 0) {
                        expectedString.append(", ");
                    }
                    expectedString.append(parTypes[i].getName());
                }
            }
            final IllegalArgumentException e = new IllegalArgumentException(
                "Cannot invoke " + method.getDeclaringClass().getName() + "."
                + method.getName() + " on bean class '" + bean.getClass() +
                "' - " + cause.getMessage()
                // as per https://issues.apache.org/jira/browse/BEANUTILS-224
                + " - had objects of type \"" + valueString
                + "\" but expected signature \""
                +   expectedString + "\""
                );
            if (!BeanUtils.initCause(e, cause)) {
                LOG.error("Method invocation failed", cause);
            }
            throw e;
        }
    }