Application: gvSIG desktop

/*

 * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI 

 * for visualizing and manipulating spatial features with geometry and attributes.

 *

 * Copyright (C) 2003 Vivid Solutions

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 * 

 * For more information, contact:

 *

 * Vivid Solutions

 * Suite #1A

 * 2328 Government Street

 * Victoria BC  V8T 5G5

 * Canada

 *

 * (250)385-6040

 * www.vividsolutions.com

 */

package com.vividsolutions.jump.util;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Iterator;

import java.util.List;

import java.util.ListIterator;

/**

 * A List that ignores duplicates. Note: performance is not optimized - a simple linear

 * search is performed.

 */

public class UniqueList implements List {

    private List list;

    /**

     * Creates a UniqueList.

     */

    public UniqueList() {

        this(new ArrayList());

    }

    /**

     * Creates a UniqueList backed by the given List.

     * @param list a List that will be this UniqueList's underlying List

     */

    public UniqueList(List list) {

        this.list = list;

    }

    public int size() {

        return list.size();

    }

    public boolean isEmpty() {

        return list.isEmpty();

    }

    public boolean contains(Object o) {

        return list.contains(o);

    }

    public Iterator iterator() {

        return list.iterator();

    }

    public Object[] toArray() {

        return list.toArray();

    }

    public Object[] toArray(Object[] a) {

        return list.toArray(a);

    }

    public boolean add(Object o) {

        if (list.contains(o)) {

            return false;

        }

        return list.add(o);

    }

    public boolean remove(Object o) {

        return list.remove(o);

    }

    public boolean containsAll(Collection c) {

        return list.containsAll(c);

    }

    public boolean addAll(Collection c) {

            return addAll(size(), c);

    }

    public boolean addAll(int index, Collection c) {

                ArrayList itemsToAdd = new ArrayList(c);

                itemsToAdd.removeAll(this);

                return list.addAll(index, itemsToAdd);            

    }

    public boolean removeAll(Collection c) {

        return list.removeAll(c);

    }

    public boolean retainAll(Collection c) {

        return list.retainAll(c);

    }

    public void clear() {

        list.clear();

    }

    public boolean equals(Object o) {

        return list.equals(o);

    }

    public Object get(int index) {

        return list.get(index);

    }

    public Object set(int index, Object element) {

        return list.set(index, element);

    }

    public void add(int index, Object element) {

        if (list.contains(element)) {

            return;

        }

        list.add(index, element);

    }

    public Object remove(int index) {

        return list.remove(index);

    }

    public int indexOf(Object o) {

        return list.indexOf(o);

    }

    public int lastIndexOf(Object o) {

        return list.lastIndexOf(o);

    }

    public ListIterator listIterator() {

        return list.listIterator();

    }

    public ListIterator listIterator(int index) {

        return list.listIterator(index);

    }

    public List subList(int fromIndex, int toIndex) {

        return list.subList(fromIndex, toIndex);

    }

}