1 /*
2  * Copyright (C) 2017 The Android Open Source Project
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 package android.location.cts.asn1.base;
18 
19 import com.google.common.collect.ImmutableList;
20 
21 import java.nio.ByteBuffer;
22 import java.util.Collection;
23 
24 /**
25  * Implements ASN.1 functionality.
26  *
27  */
28 public class Asn1Null extends Asn1Object {
29   private static final Collection<Asn1Tag> possibleFirstTags =
30       ImmutableList.of(Asn1Tag.NULL);
31 
getPossibleFirstTags()32   public static Collection<Asn1Tag> getPossibleFirstTags() {
33     return possibleFirstTags;
34   }
35 
getDefaultTag()36   @Override Asn1Tag getDefaultTag() {
37     return Asn1Tag.NULL;
38   }
39 
getBerValueLength()40   @Override int getBerValueLength() {
41     return 0;
42   }
43 
encodeBerValue(ByteBuffer buf)44   @Override void encodeBerValue(ByteBuffer buf) {
45   }
46 
decodeBerValue(ByteBuffer buf)47   @Override void decodeBerValue(ByteBuffer buf) {
48     if (buf.remaining() != 0) {
49       throw new IllegalArgumentException("Invalid remaining bytes: " + buf.remaining());
50     }
51   }
52 
encodePerUnaligned()53   @Override public Iterable<BitStream> encodePerUnaligned() {
54     return ImmutableList.of();
55   }
56 
encodePerAligned()57   @Override public Iterable<BitStream> encodePerAligned() {
58     return ImmutableList.of();
59   }
60 
decodePerUnaligned(BitStreamReader reader)61   @Override public void decodePerUnaligned(BitStreamReader reader) {
62   }
63 
decodePerAligned(BitStreamReader reader)64   @Override public void decodePerAligned(BitStreamReader reader) {
65   }
66 }
67