001/* 002 * The contents of this file are subject to the terms of the Common Development and 003 * Distribution License (the License). You may not use this file except in compliance with the 004 * License. 005 * 006 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the 007 * specific language governing permission and limitations under the License. 008 * 009 * When distributing Covered Software, include this CDDL Header Notice in each file and include 010 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL 011 * Header, with the fields enclosed by brackets [] replaced by your own identifying 012 * information: "Portions copyright [year] [name of copyright owner]". 013 * 014 * Copyright 2014 ForgeRock AS. 015 */ 016 017package org.forgerock.openig.jwt.dirty; 018 019import java.util.Collection; 020import java.util.Iterator; 021import java.util.Set; 022 023import org.forgerock.openig.util.SetDecorator; 024 025/** 026 * A {@link Set} decorator that notifies the provided {@link DirtyListener} when one ore more elements are removed. 027 * @param <E> type of the set 028 */ 029public class DirtySet<E> extends SetDecorator<E> { 030 031 private final DirtyListener listener; 032 033 /** 034 * Constructs a new set decorator, wrapping the specified set. 035 * 036 * @param set 037 * the set to wrap with the decorator. 038 * @param listener 039 * the change observer 040 */ 041 public DirtySet(final Set<E> set, final DirtyListener listener) { 042 super(set); 043 this.listener = listener; 044 } 045 046 @Override 047 public Iterator<E> iterator() { 048 return new DirtyIterator<E>(super.iterator(), listener); 049 } 050 051 @Override 052 public boolean remove(final Object o) { 053 if (super.remove(o)) { 054 listener.onElementsRemoved(); 055 return true; 056 } 057 return false; 058 } 059 060 @Override 061 public boolean removeAll(final Collection<?> c) { 062 if (super.removeAll(c)) { 063 listener.onElementsRemoved(); 064 return true; 065 } 066 return false; 067 } 068 069 @Override 070 public boolean retainAll(final Collection<?> c) { 071 if (super.retainAll(c)) { 072 listener.onElementsRemoved(); 073 return true; 074 } 075 return false; 076 } 077 078 @Override 079 public void clear() { 080 super.clear(); 081 listener.onElementsRemoved(); 082 } 083}