/interpreter/tags/at2dist220411/src/edu/vub/at/exceptions/XReflectionFailure.java
Java | 80 lines | 15 code | 7 blank | 58 comment | 0 complexity | 0d5060f80a0af39521bb922fa1b6ddb1 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * XReflectionFailure.java created on Jul 13, 2006 at 8:32:03 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.exceptions; 29 30import edu.vub.at.objects.ATTypeTag; 31import edu.vub.at.objects.coercion.NativeTypeTags; 32 33/** 34 * An instance of the class XReflectionFailure is thrown when something goes wrong when reflectively 35 * invoking natively implemented methods from AmbientTalk. This mechanism is used to call base-level 36 * methods on native types such as tables and numbers. The default mirror architecture relies on 37 * this feature as well to call the meta_operations on these values. Finally, the invocation of Java 38 * methods also uses this mechanism in part. The circumstances in which an XReflectionFailure 39 * exception can be raised are the following: 40 * 41 * <ul> 42 * <li>when attempting to access a Java method (both natively implemented AmbientTalk methods 43 * and symbiotic Java methods) which is not accessible due to visibility constraints</li> 44 * <li>when calling a natively implemented AmbientTalk method which throws an exception which 45 * is not either an InterpreterException or a Signal.</li> 46 * <li>when a natively implemented AmbientTalk method returns an object which is not a subtype 47 * of ATObject, and it is not a Java native type (detected in primitiveJavaToATObject)</li> 48 * <li>when reading a field from a Java object which is not present or visible</li> 49 * </ul> 50 * 51 * @author smostinc 52 */ 53public class XReflectionFailure extends InterpreterException { 54 55 private static final long serialVersionUID = 4082945147643295718L; 56 57 /** 58 * Constructor used to report failed reflective invocations which are due to underlying 59 * Java exceptions reporting e.g. the lack of sufficient access rights to invoke a method. 60 * @param message details the error and the selector being invoked or selected 61 * @param cause underlying exception (IllegalAccessException or InvocationTargetException) 62 */ 63 public XReflectionFailure(String message, Throwable cause) { 64 super(message, cause); 65 } 66 67 /** 68 * Constructor used to report failed reflective invocations which are not directly cause by 69 * Java exceptions. 70 * @param message details the precise error. 71 */ 72 public XReflectionFailure(String message) { 73 super(message); 74 } 75 76 public ATTypeTag getType() { 77 return NativeTypeTags._REFLECTIONFAILURE_; 78 } 79 80}