1/*
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
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 */
17
18/**
19* @author Vladimir N. Molotkov, Stepan M. Mishura
20* @version $Revision$
21*/
22
23package org.apache.harmony.security.asn1;
24
25import java.io.IOException;
26
27
28/**
29 * This class represents ASN.1 ANY type.
30 *
31 * @see <a href="http://asn1.elibel.tm.fr/en/standards/index.htm">ASN.1</a>
32 */
33public final class ASN1Any extends ASN1Type {
34
35    /** default implementation */
36    private static final ASN1Any ASN1= new ASN1Any();
37
38    /**
39     * Constructs ASN.1 ANY type
40     *
41     * The constructor is provided for inheritance purposes
42     * when there is a need to create a custom ASN.1 ANY type.
43     * To get a default implementation it is recommended to use
44     * getInstance() method.
45     */
46    public ASN1Any() {
47        super(TAG_ANY); // has not tag number
48    }
49
50    /**
51     * Returns ASN.1 ANY type default implementation
52     *
53     * The default implementation works with full encoding
54     * that is represented as raw byte array.
55     *
56     * @return ASN.1 ANY type default implementation
57     */
58    public static ASN1Any getInstance() {
59        return ASN1;
60    }
61
62    /**
63     * Tests provided identifier.
64     *
65     * @param identifier - identifier to be verified
66     * @return - true
67     */
68    public final boolean checkTag(int identifier) {
69        return true; //all tags are OK
70    }
71
72    public Object decode(BerInputStream in) throws IOException {
73        // only read content, doesn't check it
74        in.readContent();
75
76        if (in.isVerify) {
77            return null;
78        }
79        return getDecodedObject(in);
80    }
81
82    /**
83     * Extracts array of bytes that represents full encoding from BER input
84     * stream.
85     *
86     * @param in BER input stream
87     * @return array of bytes
88     */
89    public Object getDecodedObject(BerInputStream in) throws IOException {
90        byte[] bytesEncoded = new byte[in.offset - in.tagOffset];
91        System.arraycopy(in.buffer, in.tagOffset, bytesEncoded, 0,
92                bytesEncoded.length);
93        return bytesEncoded;
94    }
95
96    public void encodeASN(BerOutputStream out) {
97        out.encodeANY();
98    }
99
100    public void encodeContent(BerOutputStream out) {
101        out.encodeANY();
102    }
103
104    public void setEncodingContent(BerOutputStream out) {
105        out.length = ((byte[]) out.content).length;
106    }
107
108    public int getEncodedLength(BerOutputStream out) {
109        return out.length;
110    }
111}
112