Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library 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 Lesser General Public License for more * details. */ package com.liferay.portal.template.velocity.internal; import java.io.IOException; import java.util.Collection; import java.util.Collections; import java.util.Enumeration; import java.util.Map; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import org.apache.commons.collections.ExtendedProperties; /** * @author Shuyang Zhou */ public class FastExtendedProperties extends ExtendedProperties { public FastExtendedProperties() { } public FastExtendedProperties(ExtendedProperties extendedProperties) throws IOException { // Do not call putAll. See LPS-61927. //putAll(extendedProperties); Enumeration keys = extendedProperties.keys(); while (keys.hasMoreElements()) { String key = (String) keys.nextElement(); Object value = extendedProperties.get(key); addProperty(key, value); } } @Override public void clear() { _map.clear(); } @Override public Object clone() { FastExtendedProperties fastExtendedProperties = (FastExtendedProperties) super.clone(); fastExtendedProperties._map = new ConcurrentHashMap<>(_map); return fastExtendedProperties; } @Override public boolean contains(Object value) { return _map.containsKey(value); } @Override public boolean containsKey(Object key) { return _map.containsKey(key); } @Override public boolean containsValue(Object value) { return _map.containsValue(value); } @Override @SuppressWarnings("rawtypes") public Enumeration elements() { return Collections.enumeration(_map.values()); } @Override @SuppressWarnings("rawtypes") public Set entrySet() { return _map.entrySet(); } @Override public boolean equals(Object o) { return _map.equals(o); } @Override public Object get(Object key) { return _map.get(key); } @Override public int hashCode() { return _map.hashCode(); } @Override public boolean isEmpty() { return _map.isEmpty(); } @Override @SuppressWarnings("rawtypes") public Enumeration keys() { return Collections.enumeration(_map.keySet()); } @Override @SuppressWarnings("rawtypes") public Set keySet() { return _map.keySet(); } @Override public Object put(Object key, Object value) { return _map.put(key, value); } @Override @SuppressWarnings("rawtypes") public void putAll(Map t) { _map.putAll(t); } @Override public Object remove(Object key) { return _map.remove(key); } @Override public int size() { return _map.size(); } @Override public String toString() { return _map.toString(); } @Override @SuppressWarnings("rawtypes") public Collection values() { return _map.values(); } private Map<Object, Object> _map = new ConcurrentHashMap<>(); }