package be.jeffcheasey88.peeratcode.parser.java;

import java.lang.reflect.Array;
import java.util.Iterator;

public class ArrayBuffer<E>{

	private E[] elements;
	
	public ArrayBuffer(java.lang.Class<?> type){
		this.elements = (E[]) Array.newInstance(type, 0);
	}
	
	public void add(E e){
		E[] copy = (E[]) Array.newInstance(e.getClass(), this.elements.length+1);
		System.arraycopy(elements, 0, copy, 0, elements.length);
		copy[elements.length] = e;
		this.elements = copy;
	}
	
	public void append(java.util.function.Function<E, E> modifier){
		this.elements[elements.length-1] = modifier.apply(this.elements[elements.length-1]);
	}
	
	public Iterator<E> iterator(){
		return new ArrayIterator<E>(elements);
	}
}