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 CheckArg.isNotNull(bytes, "bytes");
49 this.bytes = bytes;
50 }
51
52 /**
53 * {@inheritDoc}
54 *
55 * @see java.lang.Object#hashCode()
56 */
57 @Override
58 public int hashCode() {
59 if (sha1hash == null) {
60 // Idempotent, so doesn't matter if we recompute in concurrent threads ...
61 sha1hash = computeHash(bytes);
62 hc = sha1hash.hashCode();
63 }
64 return hc;
65 }
66
67 /**
68 * {@inheritDoc}
69 */
70 public long getSize() {
71 return this.bytes.length;
72 }
73
74 /**
75 * {@inheritDoc}
76 *
77 * @see org.modeshape.graph.property.Binary#getHash()
78 */
79 public byte[] getHash() {
80 if (sha1hash == null) {
81 // Idempotent, so doesn't matter if we recompute in concurrent threads ...
82 sha1hash = computeHash(bytes);
83 hc = sha1hash.hashCode();
84 }
85 return sha1hash;
86 }
87
88 /**
89 * {@inheritDoc}
90 */
91 public byte[] getBytes() {
92 return this.bytes;
93 }
94
95 /**
96 * {@inheritDoc}
97 */
98 public InputStream getStream() {
99 return new ByteArrayInputStream(this.bytes);
100 }
101
102 /**
103 * {@inheritDoc}
104 */
105 public void acquire() {
106 // do nothing
107 }
108
109 /**
110 * {@inheritDoc}
111 */
112 public void release() {
113 // do nothing
114 }
115 }