Queue.java

//Grupo 2.3

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

public class Queue<ELEMENT> {

    private final static Integer defaulDimension = 10;

    private int dimension;
    protected Class<?> elementClass;
    protected SimpleLinkedList<ELEMENT> list;
    private int count;

    public Queue() {
        list = new SimpleLinkedList<ELEMENT>();
        this.count = 0;
        dimension = defaulDimension;
    }

    @SuppressWarnings("unchecked")
    public Queue(int dimension,  ELEMENT... dummy) {
        if (dummy.length > 0) {
            throw new IllegalArgumentException("No se debe facilitar valores para dummy");
        }
        elementClass = dummy.getClass().getComponentType();
        list = new SimpleLinkedList<ELEMENT>();
        this.count = 0;
        this.dimension = dimension;
    }

    public boolean add(ELEMENT element) {

        if (list.size() >= dimension) {
            throw new IllegalStateException("Cola llena ...");
        }

        list.addLast(element);
        ++count;

        return true;
    }

    public ELEMENT element() {

        if (list.size() <= 0) {
            throw new IllegalStateException("Cola vacía ...");
        }

        return list.getFirst();
    }

    public boolean offer(ELEMENT element) {

        if (list.size() >= dimension) {
            return false;
        }

        list.addLast(element);
        ++count;

        return true;
    }

    public ELEMENT peek() {
        if (this.size() <= 0) {
            return null;
        }

        return list.getFirst();
    }

    public ELEMENT pool() {
        if (this.size() <= 0) {
            return null;
        }

        ELEMENT result = list.removeFirst();
        --count;

        return result;
    }

    public ELEMENT remove() {
        if (this.size() <= 0) {
            throw new IllegalStateException("Cola vacía");
        }

        ELEMENT result = list.removeFirst();
        --count;

        return result;
    }

    public boolean isEmpty() {
        return list.size() <= 0;
    }

    public int size() {
        return list.size();
    }

    public Object[] toArray() {
        ELEMENT [] result = (ELEMENT []) Array.newInstance(this.elementClass, this.size());
        Iterator<ELEMENT> iteratorList = list.iterator();
        int i = 0;

        while(iteratorList.hasNext()) {
            result[i] = iteratorList.next();
            ++i;
        }
        return result;
    }

    public int getDimension() {
        return dimension;
    }

    public void setDimension(int dimension) {
        this.dimension = dimension;
    }

}