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 com.android.apksig.internal.asn1.ber; 18 19 /** 20 * Reader of ASN.1 Basic Encoding Rules (BER) data values. 21 * 22 * <p>BER data value reader returns data values, one by one, from a source. The interpretation of 23 * data values (e.g., how to obtain a numeric value from an INTEGER data value, or how to extract 24 * the elements of a SEQUENCE value) is left to clients of the reader. 25 */ 26 public interface BerDataValueReader { 27 28 /** 29 * Returns the next data value or {@code null} if end of input has been reached. 30 * 31 * @throws BerDataValueFormatException if the value being read is malformed. 32 */ readDataValue()33 BerDataValue readDataValue() throws BerDataValueFormatException; 34 } 35