package cx.sfy.TheBridge.fanciful;

import org.apache.commons.lang.Validate;

import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Collection;

public final class ArrayWrapper<E> {

	public ArrayWrapper(@SuppressWarnings("unchecked") E... elements) {
		setArray(elements);
	}

	private E[] _array;

	public E[] getArray() {
		return _array;
	}

	public void setArray(E[] array) {
		Validate.notNull(array, "The array must not be null.");
		_array = array;
	}

	@SuppressWarnings("rawtypes")
	@Override
	public boolean equals(Object other) {
		if (!(other instanceof ArrayWrapper)) {
			return false;
		}
		return Arrays.equals(_array, ((ArrayWrapper) other)._array);
	}

	@Override
	public int hashCode() {
		return Arrays.hashCode(_array);
	}

	@SuppressWarnings("unchecked")
	public static <T> T[] toArray(Iterable<? extends T> list, Class<T> c) {
		int size = -1;
		if (list instanceof Collection<?>) {
			@SuppressWarnings("rawtypes")
			Collection coll = (Collection) list;
			size = coll.size();
		}


		if (size < 0) {
			size = 0;
			for (@SuppressWarnings("unused") T element : list) {
				size++;
			}
		}

		T[] result = (T[]) Array.newInstance(c, size);
		int i = 0;
		for (T element : list) {
			result[i++] = element;
		}
		return result;
	}

}