1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.graph.property.basic;
25
26 import java.io.ByteArrayInputStream;
27 import java.io.InputStream;
28 import net.jcip.annotations.Immutable;
29 import org.modeshape.common.util.CheckArg;
30 import org.modeshape.graph.property.Binary;
31
32 /**
33 * An implementation of {@link Binary} that keeps the binary data in-memory.
34 */
35 @Immutable
36 public class InMemoryBinary extends AbstractBinary {
37
38 /**
39 * Version {@value} .
40 */
41 private static final long serialVersionUID = 2L;
42
43 private final byte[] bytes;
44 private byte[] sha1hash;
45 private int hc;
46
47 public InMemoryBinary( byte[] bytes ) {
48 super();
49 CheckArg.isNotNull(bytes, "bytes");
50 this.bytes = bytes;
51 }
52
53 /**
54 * {@inheritDoc}
55 *
56 * @see java.lang.Object#hashCode()
57 */
58 @Override
59 public int hashCode() {
60 if (sha1hash == null) {
61 // Idempotent, so doesn't matter if we recompute in concurrent threads ...
62 sha1hash = computeHash(bytes);
63 hc = sha1hash.hashCode();
64 }
65 return hc;
66 }
67
68 /**
69 * {@inheritDoc}
70 */
71 public long getSize() {
72 return this.bytes.length;
73 }
74
75 /**
76 * {@inheritDoc}
77 *
78 * @see org.modeshape.graph.property.Binary#getHash()
79 */
80 public byte[] getHash() {
81 if (sha1hash == null) {
82 // Idempotent, so doesn't matter if we recompute in concurrent threads ...
83 sha1hash = computeHash(bytes);
84 hc = sha1hash.hashCode();
85 }
86 return sha1hash;
87 }
88
89 /**
90 * {@inheritDoc}
91 */
92 public byte[] getBytes() {
93 return this.bytes;
94 }
95
96 /**
97 * {@inheritDoc}
98 */
99 public InputStream getStream() {
100 return new ByteArrayInputStream(this.bytes);
101 }
102
103 /**
104 * {@inheritDoc}
105 */
106 public void acquire() {
107 // do nothing
108 }
109
110 /**
111 * {@inheritDoc}
112 */
113 public void release() {
114 // do nothing
115 }
116 }