1/* 2 * Copyright (c) 2016, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24import java.io.ByteArrayInputStream; 25import java.io.DataInputStream; 26import java.io.IOException; 27import java.io.InputStream; 28 29/** 30 * Generic JDWP reply 31 */ 32public abstract class JdwpReply { 33 34 protected final static int HEADER_LEN = 11; 35 private byte[] errCode = new byte[2]; 36 private byte[] data; 37 38 public final void initFromStream(InputStream is) throws IOException { 39 DataInputStream ds = new DataInputStream(is); 40 41 int length = ds.readInt(); 42 int id = ds.readInt(); 43 byte flags = (byte) ds.read(); 44 45 ds.read(errCode, 0, 2); 46 47 int dataLength = length - HEADER_LEN; 48 if (dataLength > 0) { 49 data = new byte[dataLength]; 50 ds.read(data, 0, dataLength); 51 parseData(new DataInputStream(new ByteArrayInputStream(data))); 52 } 53 } 54 55 protected void parseData(DataInputStream ds) throws IOException { 56 } 57 58 protected byte[] readJdwpString(DataInputStream ds) throws IOException { 59 byte[] str = null; 60 int len = ds.readInt(); 61 if (len > 0) { 62 str = new byte[len]; 63 ds.read(str, 0, len); 64 } 65 return str; 66 } 67 68 protected long readRefId(DataInputStream ds) throws IOException { 69 return ds.readLong(); 70 } 71 72 public int getErrorCode() { 73 return (((errCode[0] & 0xFF) << 8) | (errCode[1] & 0xFF)); 74 } 75} 76