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/interpreter/tags/at2-build060407/src/edu/vub/at/objects/natives/NATException.java

http://ambienttalk.googlecode.com/
Java | 98 lines | 49 code | 14 blank | 35 comment | 2 complexity | 34c6add389fd020d64ad1b64c422e1c9 MD5 | raw file
 1/**
 2 * AmbientTalk/2 Project
 3 * NATException.java created on Oct 13, 2006 at 1:46:47 PM
 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 java.io.ByteArrayOutputStream;
31import java.io.PrintStream;
32
33import edu.vub.at.exceptions.InterpreterException;
34import edu.vub.at.objects.ATBoolean;
35import edu.vub.at.objects.ATObject;
36import edu.vub.at.objects.ATTable;
37import edu.vub.at.objects.mirrors.Reflection;
38
39/**
40 * Instances of the class NATException provide a AmbientTalk representation for the 
41 * default instances of all InterpreterExceptions. They allow catching exceptions 
42 * thrown by the interpreter in AmbientTalk, as well as raising them for within
43 * custom code. 
44 *
45 * @author smostinc
46 */
47public class NATException extends NATByCopy {
48	
49	private final InterpreterException wrappedException_;
50	
51	public NATException(InterpreterException wrappedException) {
52		wrappedException_ = wrappedException;
53	}
54
55	public InterpreterException getWrappedException() {
56		return wrappedException_;
57	}
58
59	public NATText base_getMessage() throws InterpreterException {
60		return NATText.atValue(wrappedException_.getMessage());
61	}
62	
63	public NATText base_getStackTrace() throws InterpreterException {
64		ByteArrayOutputStream out = new ByteArrayOutputStream();
65		wrappedException_.printAmbientTalkStackTrace(new PrintStream(out));
66		return NATText.atValue(out.toString());
67	}
68	
69	public NATNil base_setStackTrace(NATText newTrace) throws InterpreterException {
70		return NATNil._INSTANCE_;
71	}
72	
73	public ATObject meta_newInstance(ATTable initargs) throws InterpreterException {
74        return Reflection.upExceptionCreation(wrappedException_, initargs);
75    }
76
77	public ATBoolean meta_isRelatedTo(ATObject object) throws InterpreterException {
78		if(object instanceof NATException) {
79			return NATBoolean.atValue(
80					wrappedException_.getClass().isAssignableFrom(
81					((NATException)object).wrappedException_.getClass())); 
82		} else {
83			return NATBoolean._FALSE_;
84		}
85	}
86	
87    public ATTable meta_getStripes() throws InterpreterException {
88    	return NATTable.of(wrappedException_.getStripeType());
89    }
90    
91    public NATText meta_print() throws InterpreterException {
92    	return NATText.atValue("<exception:" + wrappedException_.getStripeType() + ": " + wrappedException_.getMessage() + ">");
93    }
94    
95	public ATObject meta_clone() throws InterpreterException {
96		return this;
97	}
98}