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 32 public static Collection<Asn1Tag> getPossibleFirstTags() { 33 return possibleFirstTags; 34 } 35 36 @Override Asn1Tag getDefaultTag() { 37 return Asn1Tag.NULL; 38 } 39 40 @Override int getBerValueLength() { 41 return 0; 42 } 43 44 @Override void encodeBerValue(ByteBuffer buf) { 45 } 46 47 @Override void decodeBerValue(ByteBuffer buf) { 48 if (buf.remaining() != 0) { 49 throw new IllegalArgumentException("Invalid remaining bytes: " + buf.remaining()); 50 } 51 } 52 53 @Override public Iterable<BitStream> encodePerUnaligned() { 54 return ImmutableList.of(); 55 } 56 57 @Override public Iterable<BitStream> encodePerAligned() { 58 return ImmutableList.of(); 59 } 60 61 @Override public void decodePerUnaligned(BitStreamReader reader) { 62 } 63 64 @Override public void decodePerAligned(BitStreamReader reader) { 65 } 66 } 67
