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	/*
	* Copyright (c) 1999, 2011, 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. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* 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.
	*/

	/*
	* This source code is provided to illustrate the usage of a given feature
	* or technique and has been deliberately simplified. Additional steps
	* required for a production-quality application, such as security checks,
	* input validation and proper error handling, might not be present in
	* this sample code.
	*/


	package com.sun.tools.example.debug.event;

	import com.sun.jdi.*;
	import com.sun.jdi.event.*;
	import com.sun.jdi.request.*;

	import java.util.*;

	public abstract class AbstractEventSet extends EventObject implements EventSet {

	private static final long serialVersionUID = 2772717574222076977L;
	private final EventSet jdiEventSet;
	final Event oneEvent;

	/**
	*/
	AbstractEventSet(EventSet jdiEventSet) {
	super(jdiEventSet.virtualMachine());
	this.jdiEventSet = jdiEventSet;
	this.oneEvent = eventIterator().nextEvent();
	}

	public static AbstractEventSet toSpecificEventSet(EventSet jdiEventSet) {
	Event evt = jdiEventSet.eventIterator().nextEvent();
	if (evt instanceof LocatableEvent) {
	if (evt instanceof ExceptionEvent) {
	return new ExceptionEventSet(jdiEventSet);
	} else if (evt instanceof WatchpointEvent) {
	if (evt instanceof AccessWatchpointEvent) {
	return new AccessWatchpointEventSet(jdiEventSet);
	} else {
	return new ModificationWatchpointEventSet(jdiEventSet);
	}
	} else {
	return new LocationTriggerEventSet(jdiEventSet);
	}
	} else if (evt instanceof ClassPrepareEvent) {
	return new ClassPrepareEventSet(jdiEventSet);
	} else if (evt instanceof ClassUnloadEvent) {
	return new ClassUnloadEventSet(jdiEventSet);
	} else if (evt instanceof ThreadDeathEvent) {
	return new ThreadDeathEventSet(jdiEventSet);
	} else if (evt instanceof ThreadStartEvent) {
	return new ThreadStartEventSet(jdiEventSet);
	} else if (evt instanceof VMDeathEvent) {
	return new VMDeathEventSet(jdiEventSet);
	} else if (evt instanceof VMDisconnectEvent) {
	return new VMDisconnectEventSet(jdiEventSet);
	} else if (evt instanceof VMStartEvent) {
	return new VMStartEventSet(jdiEventSet);
	} else {
	throw new IllegalArgumentException("Unknown event " + evt);
	}
	}

	public abstract void notify(JDIListener listener);

	// Implement Mirror

	@Override
	public VirtualMachine virtualMachine() {
	return jdiEventSet.virtualMachine();
	}

	public VirtualMachine getVirtualMachine() {
	return jdiEventSet.virtualMachine();
	}

	// Implement EventSet

	/**
	* Returns the policy used to suspend threads in the target VM
	* for this event set. This policy is selected from the suspend
	* policies for each event's request. The one that suspends the
	* most threads is chosen when the event occurs in the target VM
	* and that policy is returned here. See
	* com.sun.jdi.request.EventRequest for the possible policy values.
	*
	* @return the integer suspendPolicy
	*/
	public int getSuspendPolicy() {
	return jdiEventSet.suspendPolicy();
	}

	@Override
	public void resume() {
	jdiEventSet.resume();
	}

	@Override
	public int suspendPolicy() {
	return jdiEventSet.suspendPolicy();
	}

	public boolean suspendedAll() {
	return jdiEventSet.suspendPolicy() == EventRequest.SUSPEND_ALL;
	}

	public boolean suspendedEventThread() {
	return jdiEventSet.suspendPolicy() == EventRequest.SUSPEND_EVENT_THREAD;
	}

	public boolean suspendedNone() {
	return jdiEventSet.suspendPolicy() == EventRequest.SUSPEND_NONE;
	}

	/**
	* Return an iterator specific to {@link Event} objects.
	*/
	@Override
	public EventIterator eventIterator() {
	return jdiEventSet.eventIterator();
	}


	// Implement java.util.Set (by pass through)

	/**
	* Returns the number of elements in this set (its cardinality). If this
	* set contains more than <tt>Integer.MAX_VALUE</tt> elements, returns
	* <tt>Integer.MAX_VALUE</tt>.
	*
	* @return the number of elements in this set (its cardinality).
	*/
	@Override
	public int size() {
	return jdiEventSet.size();
	}

	/**
	* Returns <tt>true</tt> if this set contains no elements.
	*
	* @return <tt>true</tt> if this set contains no elements.
	*/
	@Override
	public boolean isEmpty() {
	return jdiEventSet.isEmpty();
	}

	/**
	* Returns <tt>true</tt> if this set contains the specified element. More
	* formally, returns <tt>true</tt> if and only if this set contains an
	* element <code>e</code> such that <code>(o==null ? e==null :
	* o.equals(e))</code>.
	*
	* @return <tt>true</tt> if this set contains the specified element.
	*/
	@Override
	public boolean contains(Object o) {
	return jdiEventSet.contains(o);
	}

	/**
	* Returns an iterator over the elements in this set. The elements are
	* returned in no particular order (unless this set is an instance of some
	* class that provides a guarantee).
	*
	* @return an iterator over the elements in this set.
	*/
	@Override
	public Iterator<Event> iterator() {
	return jdiEventSet.iterator();
	}

	/**
	* Returns an array containing all of the elements in this set.
	* Obeys the general contract of the <tt>Collection.toArray</tt> method.
	*
	* @return an array containing all of the elements in this set.
	*/
	@Override
	public Object[] toArray() {
	return jdiEventSet.toArray();
	}

	/**
	* Returns an array containing all of the elements in this set whose
	* runtime type is that of the specified array. Obeys the general
	* contract of the <tt>Collection.toArray(Object[])</tt> method.
	*
	* @param a the array into which the elements of this set are to
	* be stored, if it is big enough {
	return jdiEventSet.XXX();
	} otherwise, a new array of the
	* same runtime type is allocated for this purpose.
	* @return an array containing the elements of this set.
	* @throws ArrayStoreException the runtime type of a is not a supertype
	* of the runtime type of every element in this set.
	*/
	@Override
	public <T> T[] toArray(T a[]) {
	return jdiEventSet.toArray(a);
	}

	// Bulk Operations

	/**
	* Returns <tt>true</tt> if this set contains all of the elements of the
	* specified collection. If the specified collection is also a set, this
	* method returns <tt>true</tt> if it is a <i>subset</i> of this set.
	*
	* @param c collection to be checked for containment in this set.
	* @return <tt>true</tt> if this set contains all of the elements of the
	* specified collection.
	*/
	@Override
	public boolean containsAll(Collection<?> c) {
	return jdiEventSet.containsAll(c);
	}


	// Make the rest of Set unmodifiable

	@Override
	public boolean add(Event e){
	throw new UnsupportedOperationException();
	}
	@Override
	public boolean remove(Object o) {
	throw new UnsupportedOperationException();
	}
	@Override
	public boolean addAll(Collection<? extends Event> coll) {
	throw new UnsupportedOperationException();
	}
	@Override
	public boolean removeAll(Collection<?> coll) {
	throw new UnsupportedOperationException();
	}
	@Override
	public boolean retainAll(Collection<?> coll) {
	throw new UnsupportedOperationException();
	}
	@Override
	public void clear() {
	throw new UnsupportedOperationException();
	}
	}

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