| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.util; |
| |
| /** |
| * {@code ListResourceBundle} is the abstract superclass of classes which provide |
| * resources by implementing the {@code getContents()} method to return |
| * the list of resources. |
| * |
| * @see ResourceBundle |
| * @since 1.1 |
| */ |
| public abstract class ListResourceBundle extends ResourceBundle { |
| HashMap<String, Object> table; |
| |
| /** |
| * Constructs a new instance of this class. |
| */ |
| public ListResourceBundle() { |
| super(); |
| } |
| |
| /** |
| * Returns an {@code Object} array which contains the resources of this |
| * {@code ListResourceBundle}. Each element in the array is an array of two |
| * elements, the first is the resource key string and the second is the |
| * resource. |
| * |
| * @return a {@code Object} array containing the resources. |
| */ |
| protected abstract Object[][] getContents(); |
| |
| /** |
| * Returns the names of the resources contained in this {@code ListResourceBundle}. |
| * |
| * @return an {@code Enumeration} of the resource names. |
| */ |
| @Override |
| public Enumeration<String> getKeys() { |
| initializeTable(); |
| if (parent != null) { |
| return new Enumeration<String>() { |
| Iterator<String> local = table.keySet().iterator(); |
| |
| Enumeration<String> pEnum = parent.getKeys(); |
| |
| String nextElement; |
| |
| private boolean findNext() { |
| if (nextElement != null) { |
| return true; |
| } |
| while (pEnum.hasMoreElements()) { |
| String next = pEnum.nextElement(); |
| if (!table.containsKey(next)) { |
| nextElement = next; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public boolean hasMoreElements() { |
| if (local.hasNext()) { |
| return true; |
| } |
| return findNext(); |
| } |
| |
| public String nextElement() { |
| if (local.hasNext()) { |
| return local.next(); |
| } |
| if (findNext()) { |
| String result = nextElement; |
| nextElement = null; |
| return result; |
| } |
| // Cause an exception |
| return pEnum.nextElement(); |
| } |
| }; |
| } else { |
| return new Enumeration<String>() { |
| Iterator<String> it = table.keySet().iterator(); |
| |
| public boolean hasMoreElements() { |
| return it.hasNext(); |
| } |
| |
| public String nextElement() { |
| return it.next(); |
| } |
| }; |
| } |
| } |
| |
| @Override |
| public final Object handleGetObject(String key) { |
| initializeTable(); |
| if (key == null) { |
| throw new NullPointerException(); |
| } |
| return table.get(key); |
| } |
| |
| private synchronized void initializeTable() { |
| if (table == null) { |
| Object[][] contents = getContents(); |
| table = new HashMap<String, Object>(contents.length / 3 * 4 + 3); |
| for (Object[] content : contents) { |
| if (content[0] == null || content[1] == null) { |
| throw new NullPointerException(); |
| } |
| table.put((String) content[0], content[1]); |
| } |
| } |
| } |
| } |