86 lines
2.9 KiB
Java
86 lines
2.9 KiB
Java
/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.ByteArrayInputStream;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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/**
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* Generic JDWP reply
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*/
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public abstract class JdwpReply {
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protected final static int HEADER_LEN = 11;
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private byte[] errCode = new byte[2];
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private byte[] data;
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public final void initFromStream(InputStream is) throws IOException {
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DataInputStream ds = new DataInputStream(is);
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int length = ds.readInt();
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int id = ds.readInt();
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byte flags = (byte) ds.read();
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ds.read(errCode, 0, 2);
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int dataLength = length - HEADER_LEN;
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if (dataLength > 0) {
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data = new byte[dataLength];
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int bytesRead = ds.read(data, 0, dataLength);
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// For large data JDWP agent sends two packets: 1011 bytes in
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// the first packet (1000 + HEADER_LEN) and the rest in the
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// second packet.
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if (bytesRead > 0 && bytesRead < dataLength) {
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System.out.println("[" + getClass().getName() + "] Only " +
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bytesRead + " bytes of " + dataLength + " were " +
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"read in the first packet. Reading the rest...");
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ds.read(data, bytesRead, dataLength - bytesRead);
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}
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parseData(new DataInputStream(new ByteArrayInputStream(data)));
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}
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}
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protected void parseData(DataInputStream ds) throws IOException {
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}
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protected byte[] readJdwpString(DataInputStream ds) throws IOException {
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byte[] str = null;
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int len = ds.readInt();
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if (len > 0) {
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str = new byte[len];
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ds.read(str, 0, len);
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}
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return str;
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}
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protected long readRefId(DataInputStream ds) throws IOException {
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return ds.readLong();
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}
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public int getErrorCode() {
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return (((errCode[0] & 0xFF) << 8) | (errCode[1] & 0xFF));
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}
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}
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