1 /*
2 * Copyright 2005 The Apache Software Foundation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17
18 package org.apache.asn1.der;
19
20 import java.math.BigInteger;
21
22 /***
23 * DER Integer object.
24 */
25 public class DERInteger extends DERObject
26 {
27 /***
28 * Basic DERObject constructor.
29 */
30 DERInteger( byte[] value )
31 {
32 super( INTEGER, value );
33 }
34
35 /***
36 * Static factory method, type-conversion operator.
37 */
38 public static DERInteger valueOf( int integer )
39 {
40 return new DERInteger( intToOctet( integer ) );
41 }
42
43 /***
44 * Lazy accessor
45 * @return integer value
46 */
47 public int intValue()
48 {
49 return octetToInt( value );
50 }
51
52 private static int octetToInt( byte[] bytes )
53 {
54 return new BigInteger( bytes ).intValue();
55 }
56
57 private static byte[] intToOctet( int integer )
58 {
59 return BigInteger.valueOf( integer ).toByteArray();
60 }
61 }
62