1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.commons.jcs.jcache; 20 21 import javax.cache.integration.CacheLoader; 22 import javax.cache.integration.CacheLoaderException; 23 import java.util.HashMap; 24 import java.util.Map; 25 26 public class NoLoader<K, V> implements CacheLoader<K, V> 27 { 28 public static final NoLoader INSTANCE = new NoLoader(); 29 30 private NoLoader() 31 { 32 // no-op 33 } 34 35 @Override 36 public V load(K key) throws CacheLoaderException 37 { 38 return null; 39 } 40 41 @Override 42 public Map<K, V> loadAll(final Iterable<? extends K> keys) throws CacheLoaderException 43 { 44 final Map<K, V> entries = new HashMap<K, V>(); 45 for (final K k : keys) 46 { 47 entries.put(k, null); 48 } 49 return entries; 50 } 51 }