1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 27 /* 28 * The Original Code is HAT. The Initial Developer of the 29 * Original Code is Bill Foote, with contributions from others 30 * at JavaSoft/Sun. 31 */ 32 33 package jdk.test.lib.hprof.parser; 34 35 import java.io.DataInputStream; 36 import java.io.InputStream; 37 38 /** 39 * A DataInputStream that keeps track of total bytes read 40 * (in effect 'position' in stream) so far. 41 * 42 */ 43 public class PositionDataInputStream extends DataInputStream { 44 public PositionDataInputStream(InputStream in) { 45 super(in instanceof PositionInputStream? 46 in : new PositionInputStream(in)); 47 } 48 49 public boolean markSupported() { 50 return false; 51 } 52 53 public void mark(int readLimit) { 54 throw new UnsupportedOperationException("mark"); 55 } 56 57 public void reset() { 58 throw new UnsupportedOperationException("reset"); 59 } 60 61 public long position() { 62 return ((PositionInputStream)in).position(); 63 } 64 }