2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 package org.apache.tools.zip;
22 * Utility class that represents a two byte integer with conversion rules for
23 * the big endian byte order of ZIP files.
26 public final class ZipShort implements Cloneable {
31 * Create instance from a number.
34 * the int to store as a ZipShort
37 public ZipShort(int value) {
42 * Create instance from bytes.
45 * the bytes to store as a ZipShort
48 public ZipShort(byte[] bytes) {
53 * Create instance from the two bytes starting at offset.
56 * the bytes to store as a ZipShort
61 public ZipShort(byte[] bytes, int offset) {
62 value = ZipShort.getValue(bytes, offset);
66 * Get value as two bytes in big endian byte order.
68 * @return the value as a a two byte array in big endian byte order
71 public byte[] getBytes() {
72 byte[] result = new byte[2];
73 result[0] = (byte) (value & 0xFF);
74 result[1] = (byte) ((value & 0xFF00) >> 8);
79 * Get value as Java int.
81 * @return value as a Java int
84 public int getValue() {
89 * Get value as two bytes in big endian byte order.
92 * the Java int to convert to bytes
93 * @return the converted int as a byte array in big endian byte order
95 public static byte[] getBytes(int value) {
96 byte[] result = new byte[2];
97 result[0] = (byte) (value & 0xFF);
98 result[1] = (byte) ((value & 0xFF00) >> 8);
103 * Helper method to get the value as a java int from two bytes starting at
109 * the offset to start
110 * @return the correspondanding java int value
112 public static int getValue(byte[] bytes, int offset) {
113 int value = (bytes[offset + 1] << 8) & 0xFF00;
114 value += (bytes[offset] & 0xFF);
119 * Helper method to get the value as a java int from a two-byte array
123 * @return the correspondanding java int value
125 public static int getValue(byte[] bytes) {
126 return getValue(bytes, 0);
130 * Override to make two instances with same value equal.
133 * an object to compare
134 * @return true if the objects are equal
137 public boolean equals(Object o) {
138 if (o == null || !(o instanceof ZipShort)) {
141 return value == ((ZipShort) o).getValue();
145 * Override to make two instances with same value equal.
147 * @return the value stored in the ZipShort
150 public int hashCode() {