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/interpreter/tags/reactive-pattern-matching/src/edu/vub/at/objects/natives/NATByRef.java

http://ambienttalk.googlecode.com/
Java | 61 lines | 13 code | 5 blank | 43 comment | 0 complexity | 4a406e0dd24bd9f0e3f919ec16e4aeae MD5 | raw file
 1/**
 2 * AmbientTalk/2 Project
 3 * NATByRef.java created on 29-dec-2006 at 15:57:37
 4 * (c) Programming Technology Lab, 2006 - 2007
 5 * Authors: Tom Van Cutsem & Stijn Mostinckx
 6 * 
 7 * Permission is hereby granted, free of charge, to any person
 8 * obtaining a copy of this software and associated documentation
 9 * files (the "Software"), to deal in the Software without
10 * restriction, including without limitation the rights to use,
11 * copy, modify, merge, publish, distribute, sublicense, and/or
12 * sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following
14 * conditions:
15 *
16 * The above copyright notice and this permission notice shall be
17 * included in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
27 */
28package edu.vub.at.objects.natives;
29
30import edu.vub.at.actors.natives.ELActor;
31import edu.vub.at.exceptions.InterpreterException;
32import edu.vub.at.exceptions.XIllegalOperation;
33import edu.vub.at.objects.ATObject;
34
35/**
36 * This class is the abstract superclass of all AT/2 objects that require by-reference
37 * parameter passing semantics when passed between actors.
38 *
39 * @author tvcutsem
40 */
41public abstract class NATByRef extends NativeATObject {
42
43	/**
44	 * By reference objects serialize to a proxy representation. This proxy
45	 * representation takes the form of a far reference to the local object.
46	 */
47	public ATObject meta_pass() throws InterpreterException {
48		return ELActor.currentActor().getImplicitActorMirror().base_createReference(this);
49	}
50	
51	/**
52	 * By reference objects cannot be deserialized, by definition.
53	 * It is an error to try to resolve an unserializable by reference object.
54	 * The object on which meta_resolve is normally invoked is the proxy
55	 * representation that was returned by this object's meta_pass method.
56	 */
57	public ATObject meta_resolve() throws InterpreterException {
58		throw new XIllegalOperation("Cannot deserialize a by reference object: " + this);
59	}
60	
61}