jodd-bean/src/main/java/jodd/typeconverter/impl/IntegerArrayConverter.java
protected int[] convertValueToArray(final Object value) {
		if (value instanceof Collection) {
			final Collection collection = (Collection) value;
			final int[] target = new int[collection.size()];

			int i = 0;
			for (final Object element : collection) {
				target[i] = convertType(element);
				i++;
			}

			return target;
		}

		if (value instanceof Iterable) {
			final Iterable iterable = (Iterable) value;

			final FastIntBuffer fastIntBuffer = new FastIntBuffer();

			for (final Object element : iterable) {
				final int convertedValue = convertType(element);
				fastIntBuffer.append(convertedValue);
			}

			return fastIntBuffer.toArray();
		}

		if (value instanceof CharSequence) {
			final String[] strings = StringUtil.splitc(value.toString(), ArrayConverter.NUMBER_DELIMITERS);
			return convertArrayToArray(strings);
		}

		// everything else:
		return convertToSingleElementArray(value);
	}
protected int[] convertValueToArray(final Object value) {
		if (value instanceof Collection) {
			final Collection collection = (Collection) value;
			final int[] target = new int[collection.size()];

			int i = 0;
			for (final Object element : collection) {
				target[i] = convertType(element);
				i++;
			}

			return target;
		}

		if (value instanceof Iterable) {
			final Iterable iterable = (Iterable) value;

			final FastIntBuffer fastIntBuffer = new FastIntBuffer();

			for (final Object element : iterable) {
				final int convertedValue = convertType(element);
				fastIntBuffer.append(convertedValue);
			}

			return fastIntBuffer.toArray();
		}

		if (value instanceof CharSequence) {
			final String[] strings = StringUtil.splitc(value.toString(), ArrayConverter.NUMBER_DELIMITERS);
			return convertArrayToArray(strings);
		}

		// everything else:
		return convertToSingleElementArray(value);
	}
Converts non-array value to array. Detects various
collection types and iterates them to make conversion
and to create target array.