1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27 package org.apache.hc.client5.http.impl.cache;
28
29 import org.apache.hc.client5.http.cache.Resource;
30 import org.apache.hc.client5.http.cache.ResourceFactory;
31 import org.apache.hc.client5.http.cache.ResourceIOException;
32 import org.apache.hc.core5.annotation.Contract;
33 import org.apache.hc.core5.annotation.ThreadingBehavior;
34 import org.apache.hc.core5.util.Args;
35
36 /**
37 * Generates {@link Resource} instances stored entirely in heap.
38 *
39 * @since 4.1
40 */
41 @Contract(threading = ThreadingBehavior.STATELESS)
42 public class HeapResourceFactory implements ResourceFactory {
43
44 public static final HeapResourceFactory INSTANCE = new HeapResourceFactory();
45
46 @Override
47 public Resource generate(
48 final String requestId,
49 final byte[] content, final int off, final int len) {
50 final byte[] copy = new byte[len];
51 System.arraycopy(content, off, copy, 0, len);
52 return new HeapResource(copy);
53 }
54
55 @Override
56 public Resource generate(final String requestId, final byte[] content) {
57 return new HeapResource(content != null ? content.clone() : null);
58 }
59
60 @Override
61 public Resource copy(
62 final String requestId,
63 final Resource resource) throws ResourceIOException {
64 Args.notNull(resource, "Resource");
65 return new HeapResource(resource.get());
66 }
67
68 }