/interpreter/tags/at2dist170907/src/edu/vub/at/objects/natives/NATException.java

 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.coercion.NativeTypeTags;
38import edu.vub.at.objects.mirrors.Reflection;
39
40/**
41 * Instances of the class NATException provide a AmbientTalk representation for the 
42 * default instances of all InterpreterExceptions. They allow catching exceptions 
43 * thrown by the interpreter in AmbientTalk, as well as raising them for within
44 * custom code. 
45 *
46 * @author smostinc
47 */
48public class NATException extends NATByCopy {
49	
50	private final InterpreterException wrappedException_;
51	
52	public NATException(InterpreterException wrappedException) {
53		wrappedException_ = wrappedException;
54	}
55
56	public InterpreterException getWrappedException() {
57		return wrappedException_;
58	}
59
60	public NATText base_message() throws InterpreterException {
61		return NATText.atValue(wrappedException_.getMessage());
62	}
63	
64	public NATText base_stackTrace() throws InterpreterException {
65		ByteArrayOutputStream out = new ByteArrayOutputStream();
66		wrappedException_.printAmbientTalkStackTrace(new PrintStream(out));
67		return NATText.atValue(out.toString());
68	}
69	
70	public NativeATObject base_stackTrace__opeql_(NATText newTrace) throws InterpreterException {
71		return OBJNil._INSTANCE_;
72	}
73	
74	public ATObject meta_newInstance(ATTable initargs) throws InterpreterException {
75        return Reflection.upExceptionCreation(wrappedException_, initargs);
76    }
77
78	public ATBoolean meta_isRelatedTo(ATObject object) throws InterpreterException {
79		if(object instanceof NATException) {
80			return NATBoolean.atValue(
81					wrappedException_.getClass().isAssignableFrom(
82					((NATException)object).wrappedException_.getClass())); 
83		} else {
84			return NATBoolean._FALSE_;
85		}
86	}
87	
88    public ATTable meta_typeTags() throws InterpreterException {
89    	return NATTable.of(wrappedException_.getType(), NativeTypeTags._ISOLATE_);
90    }
91    
92    public NATText meta_print() throws InterpreterException {
93    	return NATText.atValue("<exception:" + wrappedException_.getType() + ": " + wrappedException_.getMessage() + ">");
94    }
95    
96	public ATObject meta_clone() throws InterpreterException {
97		return this;
98	}
99}