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Handful shortcuts for Java programming, Java 7 compatible.

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/*******************************************************************************
 * Copyright (C) 2009, 2015, Danilo Pianini and contributors
 * listed in the project's build.gradle or pom.xml file.
 *
 * This file is distributed under the terms of the Apache License, version 2.0
 *******************************************************************************/
package org.danilopianini.lang;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * @author Danilo Pianini
 *
 * @param 
 */
public class ImmutableCollectionWithCurrentElement implements CollectionWithCurrentElement {

	private final Collection col;
	private E cur;

	/**
	 * @param origin
	 *            the collection to make immutable and with a "current" element
	 * @param current
	 *            the current element
	 */
	public ImmutableCollectionWithCurrentElement(final Collection origin, final E current) {
		col = Collections.unmodifiableCollection(new ArrayList<>(origin));
		setCurrent(current);
	}

	@Override
	public boolean add(final E arg0) {
		return col.add(arg0);
	}

	@Override
	public boolean addAll(final Collection arg0) {
		return col.addAll(arg0);
	}

	@Override
	public void clear() {
		col.clear();
	}

	@Override
	public boolean contains(final Object arg0) {
		return col.contains(arg0);
	}

	@Override
	public boolean containsAll(final Collection arg0) {
		return col.containsAll(arg0);
	}

	@Override
	public boolean isEmpty() {
		return col.isEmpty();
	}

	@Override
	public Iterator iterator() {
		return col.iterator();
	}

	@Override
	public boolean remove(final Object arg0) {
		return col.remove(arg0);
	}

	@Override
	public boolean removeAll(final Collection arg0) {
		return col.removeAll(arg0);
	}

	@Override
	public boolean retainAll(final Collection arg0) {
		return col.retainAll(arg0);
	}

	@Override
	public int size() {
		return col.size();
	}

	@Override
	public Object[] toArray() {
		return col.toArray();
	}

	@Override
	public  T[] toArray(final T[] arg0) {
		return col.toArray(arg0);
	}

	@Override
	public E getCurrent() {
		return cur;
	}

	@Override
	public final void setCurrent(final E e) {
		if (col.contains(e)) {
			cur = e;
		} else {
			throw new NoSuchElementException();
		}
	}

}