public Object getIndexedProperty()

in src/main/java/org/apache/commons/beanutils2/PropertyUtilsBean.java [433:518]
74 lines of code
18 McCabe index (conditional complexity)

    public Object getIndexedProperty(final Object bean,
                                            final String name, final int index)
            throws IllegalAccessException, InvocationTargetException,
            NoSuchMethodException {
        if (bean == null) {
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null || name.isEmpty()) {
            if (bean.getClass().isArray()) {
                return Array.get(bean, index);
            }
            if (bean instanceof List) {
                return ((List<?>)bean).get(index);
            }
        }
        if (name == null) {
            throw new IllegalArgumentException("No name specified for bean class '" +
                    bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean) {
            final DynaProperty descriptor =
                    ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null) {
                throw new NoSuchMethodException("Unknown property '" +
                    name + "' on bean class '" + bean.getClass() + "'");
            }
            return ((DynaBean) bean).get(name, index);
        }

        // Retrieve the property descriptor for the specified property
        final PropertyDescriptor descriptor =
                getPropertyDescriptor(bean, name);
        if (descriptor == null) {
            throw new NoSuchMethodException("Unknown property '" +
                    name + "' on bean class '" + bean.getClass() + "'");
        }

        // Call the indexed getter method if there is one
        if (descriptor instanceof IndexedPropertyDescriptor) {
            Method readMethod = ((IndexedPropertyDescriptor) descriptor).
                    getIndexedReadMethod();
            readMethod = MethodUtils.getAccessibleMethod(bean.getClass(), readMethod);
            if (readMethod != null) {
                final Object[] subscript = new Object[1];
                subscript[0] = Integer.valueOf(index);
                try {
                    return invokeMethod(readMethod, bean, subscript);
                } catch (final InvocationTargetException e) {
                    if (e.getTargetException() instanceof
                            IndexOutOfBoundsException) {
                        throw (IndexOutOfBoundsException)
                                e.getTargetException();
                    }
                    throw e;
                }
            }
        }

        // Otherwise, the underlying property must be an array
        final Method readMethod = getReadMethod(bean.getClass(), descriptor);
        if (readMethod == null) {
            throw new NoSuchMethodException("Property '" + name + "' has no " +
                    "getter method on bean class '" + bean.getClass() + "'");
        }

        // Call the property getter and return the value
        final Object value = invokeMethod(readMethod, bean, BeanUtils.EMPTY_OBJECT_ARRAY);
        if (!value.getClass().isArray()) {
            if (!(value instanceof java.util.List)) {
                throw new IllegalArgumentException("Property '" + name +
                        "' is not indexed on bean class '" + bean.getClass() + "'");
            }
            //get the List's value
            return ((java.util.List<?>) value).get(index);
        }
        //get the array's value
        try {
            return Array.get(value, index);
        } catch (final ArrayIndexOutOfBoundsException e) {
            throw new ArrayIndexOutOfBoundsException("Index: " +
                    index + ", Size: " + Array.getLength(value) +
                    " for property '" + name + "'");
        }
    }