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/*
* Copyright (c) 2001, 2018, 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.
*/
package nsk.share.jdwp;
import nsk.share.*;
import java.util.Vector;
/**
* This class represents a JDWP event packet.
*/
public class EventPacket extends CommandPacket {
/** Offset of the "suspendPolicy" field in a JDWP event packet. */
public final static int SuspendPolicyOffset = DataOffset;
/** Offset of the "eventsCount" field in a JDWP event packet. */
public final static int EventsCountOffset = SuspendPolicyOffset + JDWP.TypeSize.BYTE;
/** Offset of the first "eventKind" field in a JDWP event packet. */
public final static int FirstEventKindOffset = EventsCountOffset + JDWP.TypeSize.INT;
/**
* Make an empty event packet.
*/
public EventPacket() {
super(JDWP.Command.Event.Composite, 0);
}
/**
* Make event packet with data from the specified byte buffer.
*/
// public EventPacket(ByteBuffer packet) {
public EventPacket(Packet packet) {
super(packet);
}
/**
* Return suspend policy of the events in the packet.
*
* throws BoundException if event packet structure is not valid
*/
public byte getSuspendPolicy() {
try {
return getByte(SuspendPolicyOffset);
}
catch (BoundException e) {
throw new Failure("Caught unexpected exception while getting event kind from header:\n\t"
+ e);
}
}
/**
* Return number of events in the packet.
*
* throws BoundException if event packet structure is not valid
*/
public int getEventsCount() {
try {
return getInt(EventsCountOffset);
}
catch (BoundException e) {
throw new Failure("Caught unexpected exception while getting event kind from header:\n\t"
+ e);
}
}
/**
* Return constant indicates kind of the first event in the packet.
*
* throws BoundException if event packet structure is not valid
*/
public int getEventKind() {
try {
return getByte(FirstEventKindOffset);
}
catch (BoundException e) {
throw new Failure("Caught unexpected exception while getting event kind from header:\n\t"
+ e);
}
}
/**
* Check event packet header.
* This method check if event packet has valid values in the header fields.
*
* @throws PacketFormatException if packet header fields have error or invalid values
*/
public void checkHeader() throws PacketFormatException {
super.checkHeader();
if (getFullCommand() != JDWP.Command.Event.Composite) {
throw new PacketFormatException("Not Event.Composite command in the event packet header: "
+ "0x" + toHexDecString(getFullCommand(), 4) );
}
if (getFlags() != JDWP.Flag.EVENT_PACKET) {
throw new PacketFormatException("Unexpected flags in the event packet header: "
+ "0x" + toHexDecString(getFlags(), 2));
}
/*
if (getPacketID() != 0) {
throw new PacketFormatException("Non-zero packet ID in the event packet header: "
+ getPacketID());
}
*/
}
/**
* Check event packet header for only one event of specified kind.
* This method check if event packet has valid values in the header fields.
*
* @throws PacketFormatException if packet header fields have error or invalid values
*/
public void checkHeader(int eventKind) throws PacketFormatException {
checkHeader();
if (getEventsCount() != 1) {
throw new PacketFormatException("Not a single event in the event packet: "
+ getEventsCount() + " events");
}
if (getEventKind() != eventKind) {
throw new PacketFormatException("Unexpected event kind in the event packet: "
+ "0x" + toHexDecString(getEventKind(), 2));
}
}
/**
* Return string representation of the event packet header.
*/
public String headerToString() {
return super.headerToString()
+ " " + toHexString(SuspendPolicyOffset, 4) + " (policy): 0x" + toHexDecString(getSuspendPolicy(), 2) + "\n"
+ " " + toHexString(EventsCountOffset, 4) + " (events): 0x" + toHexDecString(getEventsCount(), 8) + "\n"
+ " " + toHexString(FirstEventKindOffset, 4) + " (kind): 0x" + toHexDecString(getEventKind(), 2) + "\n";
}
}
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