/* * Copyright (c) 2014, grossmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the jo-widgets.org nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. */ package org.jowidgets.util.collection; import java.util.ArrayList; import java.util.Iterator; import java.util.LinkedHashSet; import org.jowidgets.util.Assert; import org.jowidgets.util.CollectionUtils; final class ObserverSetPerformanceStrategyImpl<OBSERVER_TYPE> implements IObserverSet<OBSERVER_TYPE> { private final LinkedHashSet<OBSERVER_TYPE> listeners; ObserverSetPerformanceStrategyImpl() { this.listeners = new LinkedHashSet<OBSERVER_TYPE>(); } @Override public Iterator<OBSERVER_TYPE> iterator() { return CollectionUtils.unmodifiableIterator(new ArrayList<OBSERVER_TYPE>(listeners).iterator()); } @Override public void add(final OBSERVER_TYPE observer) { Assert.paramNotNull(observer, "observer"); listeners.add(observer); } @Override public boolean remove(final OBSERVER_TYPE observer) { Assert.paramNotNull(observer, "observer"); return listeners.remove(observer); } @Override public void clear() { listeners.clear(); } }