tests/tests/location/src/android/location/cts/asn1/base/Asn1Null.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.location.cts.asn1.base;

import com.google.common.collect.ImmutableList;

import java.nio.ByteBuffer;
import java.util.Collection;

/**
 * Implements ASN.1 functionality.
 *
 */
public class Asn1Null extends Asn1Object {
  private static final Collection<Asn1Tag> possibleFirstTags =
      ImmutableList.of(Asn1Tag.NULL);

  public static Collection<Asn1Tag> getPossibleFirstTags() {
    return possibleFirstTags;
  }

  @Override Asn1Tag getDefaultTag() {
    return Asn1Tag.NULL;
  }

  @Override int getBerValueLength() {
    return 0;
  }

  @Override void encodeBerValue(ByteBuffer buf) {
  }

  @Override void decodeBerValue(ByteBuffer buf) {
    if (buf.remaining() != 0) {
      throw new IllegalArgumentException("Invalid remaining bytes: " + buf.remaining());
    }
  }

  @Override public Iterable<BitStream> encodePerUnaligned() {
    return ImmutableList.of();
  }

  @Override public Iterable<BitStream> encodePerAligned() {
    return ImmutableList.of();
  }

  @Override public void decodePerUnaligned(BitStreamReader reader) {
  }

  @Override public void decodePerAligned(BitStreamReader reader) {
  }
}