/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdi.internal.event;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jdi.internal.MirrorImpl;
import org.eclipse.jdi.internal.VirtualMachineImpl;
import org.eclipse.jdi.internal.request.EventRequestImpl;
import com.sun.jdi.InternalException;
import com.sun.jdi.ThreadReference;
import com.sun.jdi.event.Event;
import com.sun.jdi.event.EventIterator;
import com.sun.jdi.event.EventSet;
import com.sun.jdi.request.EventRequest;
/**
* this class implements the corresponding interfaces declared by the JDI
* specification. See the com.sun.jdi package for more information.
*
*/
public class EventSetImpl extends MirrorImpl implements EventSet {
/** Set that is used to store events. */
private List<Event> fEvents;
/** Which threads were suspended by this composite event. */
private byte fSuspendPolicy;
/**
* Creates new EventSetImpl.
*/
private EventSetImpl(VirtualMachineImpl vmImpl) {
super("EventSet", vmImpl); //$NON-NLS-1$
}
/**
* Creates new EventSetImpl with events in a given array.
*/
public EventSetImpl(VirtualMachineImpl vmImpl, EventImpl[] events) {
this(vmImpl);
fEvents = new ArrayList<>(events.length);
for (EventImpl event : events)
fEvents.add(event);
}
/**
* Creates new EventSetImpl with given event.
*/
public EventSetImpl(VirtualMachineImpl vmImpl, EventImpl event) {
this(vmImpl);
fEvents = new ArrayList<>(1);
fEvents.add(event);
}
/**
* @return Returns iterator over events.
*/
@Override
public EventIterator eventIterator() {
return new EventIteratorImpl(fEvents.listIterator());
}
/**
* @return Returns which threads were suspended by this composite event.
*/
@Override
public int suspendPolicy() {
switch (fSuspendPolicy) {
case EventRequestImpl.SUSPENDPOL_NONE_JDWP:
return EventRequest.SUSPEND_NONE;
case EventRequestImpl.SUSPENDPOL_EVENT_THREAD_JDWP:
return EventRequest.SUSPEND_EVENT_THREAD;
case EventRequestImpl.SUSPENDPOL_ALL_JDWP:
return EventRequest.SUSPEND_ALL;
default:
throw new InternalException(
EventMessages.EventSetImpl_Invalid_suspend_policy_encountered___1
+ fSuspendPolicy);
}
}
/**
* Resumes threads that were suspended by this event set.
*/
@Override
public void resume() {
switch (fSuspendPolicy) {
case EventRequestImpl.SUSPENDPOL_NONE_JDWP:
break;
case EventRequestImpl.SUSPENDPOL_EVENT_THREAD_JDWP:
resumeThreads();
break;
case EventRequestImpl.SUSPENDPOL_ALL_JDWP:
virtualMachineImpl().resume();
break;
default:
throw new InternalException(
EventMessages.EventSetImpl_Invalid_suspend_policy_encountered___1
+ fSuspendPolicy);
}
}
/**
* Resumes threads that were suspended by this event set.
*/
private void resumeThreads() {
if (fEvents.size() == 1) {
// Most event sets have only one event.
// Avoid expensive object creation.
ThreadReference ref = ((EventImpl)fEvents.get(0)).thread();
if (ref != null) {
ref.resume();
} else {
fEvents.get(0).virtualMachine().resume();
}
return;
}
Iterator<Event> iter = fEvents.iterator();
List<ThreadReference> resumedThreads = new ArrayList<>(fEvents.size());
while (iter.hasNext()) {
EventImpl event = (EventImpl)iter.next();
ThreadReference thread = event.thread();
if (thread == null) {
event.virtualMachine().resume();
return;
}
if (!resumedThreads.contains(thread)) {
resumedThreads.add(thread);
}
}
Iterator<ThreadReference> resumeIter = resumedThreads.iterator();
while (resumeIter.hasNext()) {
resumeIter.next().resume();
}
}
/**
* @return Returns EventSetImpl that was read from InputStream.
*/
public static EventSetImpl read(MirrorImpl target, DataInputStream in)
throws IOException {
VirtualMachineImpl vmImpl = target.virtualMachineImpl();
EventSetImpl eventSet = new EventSetImpl(vmImpl);
// Read suspend policy.
eventSet.fSuspendPolicy = target.readByte(
"suspendPolicy", EventRequestImpl.suspendPolicyMap(), in); //$NON-NLS-1$
// Read size.
int size = target.readInt("size", in); //$NON-NLS-1$
// Create event list.
eventSet.fEvents = new ArrayList<>(size);
while (size-- > 0) {
EventImpl event = EventImpl.read(target, in);
// If event == null than it is an event that must not be given to
// the application.
// See ClassPrepareEvent.
if (event == null)
continue;
EventRequestImpl request = (EventRequestImpl) event.request();
// Check if the request corresponding to the event was not generated
// from inside this JDI implementation.
if (request == null || !request.isGeneratedInside())
eventSet.fEvents.add(event);
}
return eventSet;
}
/**
* @see java.util.Collection
*/
@Override
public boolean contains(Object event) {
return fEvents.contains(event);
}
/* (non-Javadoc)
* @see java.util.Collection#containsAll(java.util.Collection)
*/
@Override
public boolean containsAll(Collection<?> events) {
return fEvents.containsAll(events);
}
/**
* @see java.util.Collection
*/
@Override
public boolean equals(Object object) {
return object != null && object.getClass().equals(this.getClass())
&& fEvents.equals(((EventSetImpl) object).fEvents);
}
/**
* @see java.util.Collection
*/
@Override
public int hashCode() {
return fEvents.hashCode();
}
/**
* @see java.util.Collection
*/
@Override
public boolean isEmpty() {
return fEvents.isEmpty();
}
/**
* @see java.util.Collection#iterator()
*/
@Override
public Iterator<Event> iterator() {
return fEvents.iterator();
}
/**
* @see java.util.Collection#size()
*/
@Override
public int size() {
return fEvents.size();
}
/**
* @see java.util.Collection#toArray()
*/
@Override
public Object[] toArray() {
return fEvents.toArray();
}
/**
* @see java.util.Collection#clear()
* @exception UnsupportedOperationException
* always thrown since EventSets are unmodifiable.
*/
@Override
public void clear() {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
/**
* @see java.util.Collection#remove(Object)
* @exception UnsupportedOperationException
* always thrown since EventSets are unmodifiable.
*/
@Override
public boolean remove(Object arg1) {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
/**
* @see java.util.Collection#removeAll(Collection)
* @exception UnsupportedOperationException
* always thrown since EventSets are unmodifiable.
*/
@Override
public boolean removeAll(Collection<?> arg1) {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
/**
* @see java.util.Collection#retainAll(Collection)
* @exception UnsupportedOperationException
* always thrown since EventSets are unmodifiable.
*/
@Override
public boolean retainAll(Collection<?> arg1) {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
/* (non-Javadoc)
* @see java.util.Collection#toArray(T[])
*/
@Override
public <T> T[] toArray(T[] a) {
return fEvents.toArray(a);
}
/* (non-Javadoc)
* @see java.util.Collection#add(java.lang.Object)
*/
@Override
public boolean add(Event o) {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
/* (non-Javadoc)
* @see java.util.Collection#addAll(java.util.Collection)
*/
@Override
public boolean addAll(Collection<? extends Event> c) {
throw new UnsupportedOperationException(
EventMessages.EventSetImpl_EventSets_are_unmodifiable_3);
}
}