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.extras.loader;
20
21 import javax.cache.configuration.Factory;
22 import javax.cache.integration.CacheLoader;
23 import javax.cache.integration.CacheLoaderException;
24 import java.util.HashMap;
25 import java.util.Map;
26
27 public abstract class CacheLoaderAdapter<K, V> implements CacheLoader<K, V>, Factory<CacheLoader<K, V>>
28 {
29 @Override
30 public Map<K, V> loadAll(final Iterable<? extends K> keys) throws CacheLoaderException
31 {
32 final Map<K, V> result = new HashMap<K, V>();
33 for (final K k : keys)
34 {
35 final V v = load(k);
36 if (v != null)
37 {
38 result.put(k, v);
39 }
40 }
41 return result;
42 }
43
44 @Override
45 public CacheLoader<K, V> create()
46 {
47 return this;
48 }
49 }