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.io.ByteArrayOutputStream;
21 import java.io.IOException;
22
23 /**
24 * DER Application Specific object.
25 */
26 public class DERApplicationSpecific extends DERObject
27 {
28 private int tag;
29
30 /**
31 * Basic DERObject constructor.
32 */
33 public DERApplicationSpecific( int tag, byte[] value )
34 {
35 super( tag, value );
36 this.tag = tag;
37 }
38
39 /**
40 * Static factory method, type-conversion operator.
41 */
42 public static DERApplicationSpecific valueOf( int tag, DEREncodable object )
43 throws IOException
44 {
45 tag = tag | CONSTRUCTED;
46
47 ByteArrayOutputStream baos = new ByteArrayOutputStream();
48 ASN1OutputStream aos = new ASN1OutputStream( baos );
49
50 aos.writeObject( object );
51
52 return new DERApplicationSpecific( tag, baos.toByteArray() );
53 }
54
55 public int getApplicationTag()
56 {
57 return tag & 0x1F;
58 }
59
60 public DEREncodable getObject()
61 throws IOException
62 {
63 return new ASN1InputStream( getOctets() ).readObject();
64 }
65
66 public void encode( ASN1OutputStream out ) throws IOException
67 {
68 out.writeEncoded( APPLICATION | tag, value );
69 }
70 }
71