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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/event/Event.java')
-rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/event/Event.java | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/event/Event.java b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/event/Event.java new file mode 100644 index 000000000..c89b25cb9 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/event/Event.java @@ -0,0 +1,180 @@ +/* Event.java -- a base class for all event types + Copyright (C) 2005, 2007 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.classpath.jdwp.event; + +import gnu.classpath.jdwp.JdwpConstants; +import gnu.classpath.jdwp.transport.JdwpCommandPacket; +import gnu.classpath.jdwp.transport.JdwpPacket; + +import java.io.DataOutputStream; +import java.io.IOException; + +/** + * This class is a base class for all VM->debugger event + * notifications. + * + * @author Keith Seitz (keiths@redhat.com) + */ +public abstract class Event +{ + /** + * The class of the object in which the event occurred + */ + public static final int EVENT_CLASS = 1; + + /** + * The thread where the event occurred + */ + public static final int EVENT_THREAD = 2; + + /** + * The location where an event occurred + */ + public static final int EVENT_LOCATION = 3; + + /** + * The instance of the class where the event occurred + */ + public static final int EVENT_INSTANCE = 4; + + /** + * The field acted on by an event + */ + public static final int EVENT_FIELD = 5; + + /** + * The class of the exception for ExceptionEvent + */ + public static final int EVENT_EXCEPTION_CLASS = 6; + + /** + * Whether this exception was caught (only valid for ExceptionEvents) + */ + public static final int EVENT_EXCEPTION_CAUGHT = 7; + + // The kind of event represented by this event + private byte _eventKind; + + /** + * Constructs an <code>Event</code> of the given kind + * + * @param kind the type of event + */ + public Event (byte kind) + { + _eventKind = kind; + } + + /** + * Returns the event type of this event + * + * @returns the event kind + */ + public byte getEventKind () + { + return _eventKind; + } + + /** + * Abstract function used by implementing classes to fill in the + * event-specific data. Note that request ID is automatically added + * by this class (since it appears in all event notifications). + * + * @param outStream the stream to which to write data + */ + protected abstract void _writeData (DataOutputStream outStream) + throws IOException; + + /** + * Returns a specific filtering parameter for this event. For example, + * most events may be filtered by thread. Consequently, a call to this + * method with <code>ThreadId.class</code> should return a + * <code>Thread</code>. + * + * @param type the type of parameter to return + * @returns the parameter (not the ID) or <code>null</code> if none is + * is defined for this event + */ + public abstract Object getParameter (int type); + + /** + * Converts the events into to a single JDWP Event.COMPOSITE packet + * + * @param dos the stream to which to write data + * @param events the events to package into the packet + * @param requests the corresponding event requests + * @param suspendPolicy the suspend policy enforced by the VM + * @returns a <code>JdwpPacket</code> of the events + */ + public static JdwpPacket toPacket (DataOutputStream dos, + Event[] events, + EventRequest[] requests, + byte suspendPolicy) + { + JdwpPacket pkt; + try + { + dos.writeByte (suspendPolicy); + dos.writeInt (events.length); + for (int i = 0; i < events.length; ++i) + _toData (dos, events[i], requests[i]); + + pkt + = new JdwpCommandPacket (JdwpConstants.CommandSet.Event.CS_VALUE, + JdwpConstants.CommandSet.Event.COMPOSITE); + } + catch (IOException ioe) + { + pkt = null; + } + + return pkt; + } + + // Helper function for toPacket + private static void _toData (DataOutputStream dos, Event event, + EventRequest request) + throws IOException + { + dos.writeByte (event._eventKind); + dos.writeInt (request.getId ()); + event._writeData (dos); + } +} |