| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Generic JDWP command |
| * @param <T> the corresponding JDWP reply class, to construct a reply object |
| */ |
| public abstract class JdwpCmd<T extends JdwpReply> { |
| |
| private ByteBuffer data; |
| private static int id = 1; |
| private final byte FLAGS = 0; |
| private T reply; |
| private final int dataLen; |
| private final int HEADER_LEN = 11; |
| |
| /** |
| * JDWWp command |
| * @param cmd command code |
| * @param cmdSet command set |
| * @param replyClz command reply class |
| * @param dataLen length of additional data for the command |
| */ |
| JdwpCmd(int cmd, int cmdSet, Class<T> replyClz, int dataLen) { |
| this.dataLen = dataLen; |
| data = ByteBuffer.allocate(HEADER_LEN + dataLen); |
| data.putInt(HEADER_LEN + dataLen); |
| data.putInt(id++); |
| data.put(FLAGS); |
| data.put((byte) cmdSet); |
| data.put((byte) cmd); |
| if (replyClz != null) { |
| try { |
| reply = replyClz.newInstance(); |
| } catch (Exception ex) { |
| ex.printStackTrace(); |
| } |
| } |
| } |
| |
| JdwpCmd(int cmd, int cmdSet, Class<T> replyClz) { |
| this(cmd, cmdSet, replyClz, 0); |
| } |
| |
| int getDataLength() { |
| return dataLen; |
| } |
| |
| public final T send(JdwpChannel channel) throws IOException { |
| channel.write(data.array(), HEADER_LEN + getDataLength()); |
| if (reply != null) { |
| reply.initFromStream(channel.getInputStream()); |
| } |
| return (T) reply; |
| } |
| |
| protected void putRefId(long refId) { |
| data.putLong(refId); |
| } |
| |
| protected void putInt(int val) { |
| data.putInt(val); |
| } |
| |
| protected static int refLen() { |
| return 8; |
| } |
| |
| } |