/interpreter/tags/at2-build270707/src/edu/vub/at/objects/mirrors/NativeAnonymousMethod.java
Java | 105 lines | 45 code | 13 blank | 47 comment | 0 complexity | 9396bacb6d2884f8fe5c86f575bc8964 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * NativeAnonymousMethod.java created on 10-aug-2006 at 10:03:55 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.mirrors; 29 30import edu.vub.at.eval.Evaluator; 31import edu.vub.at.exceptions.InterpreterException; 32import edu.vub.at.exceptions.XIllegalApplication; 33import edu.vub.at.objects.ATClosure; 34import edu.vub.at.objects.ATContext; 35import edu.vub.at.objects.ATMethod; 36import edu.vub.at.objects.ATObject; 37import edu.vub.at.objects.ATTable; 38import edu.vub.at.objects.coercion.NativeTypeTags; 39import edu.vub.at.objects.grammar.ATBegin; 40import edu.vub.at.objects.grammar.ATSymbol; 41import edu.vub.at.objects.natives.NATByRef; 42import edu.vub.at.objects.natives.NATClosure; 43import edu.vub.at.objects.natives.NATTable; 44import edu.vub.at.objects.natives.NATText; 45import edu.vub.at.objects.natives.grammar.AGBegin; 46import edu.vub.at.objects.natives.grammar.AGSymbol; 47 48/** 49 * A NativeAnonymousMethod represents the meta_apply method of an anonymous NativeClosure subclass. 50 * 51 * An anonymous native method has the following properties: 52 * - name = "nativelambda" (to distinguish it from 'ordinary' lambdas) 53 * - arguments = [ \@args ] (it takes an arbitrary number of arguments) 54 * - body = "Native implementation in {class}" (a string telling an inspector that 55 * this closure is natively implemented in the given Java class) 56 * - applying a nativelambda directly (without going through this NativeClosure) 57 * results in an error 58 * 59 * @author tvcutsem 60 */ 61public class NativeAnonymousMethod extends NATByRef implements ATMethod { 62 63 private final Class creatorClass_; 64 65 /** 66 * @param creatorClass class of the object that has created the NativeClosure that will wrap <tt>this</tt> 67 */ 68 public NativeAnonymousMethod(Class creatorClass) { 69 creatorClass_ = creatorClass; 70 } 71 72 /** 73 * It is an error to directly apply an anonymous method. The closure must be applied instead. 74 * @throws XIllegalApplication because an anonymous method must be applied through its wrapping closure. 75 */ 76 public ATObject base_apply(ATTable arguments, ATContext ctx) throws InterpreterException { 77 throw new XIllegalApplication("Cannot apply an anonymous native method. Apply the closure instead.", creatorClass_); 78 } 79 80 public ATObject base_applyInScope(ATTable arguments, ATContext ctx) throws InterpreterException { 81 return base_apply(arguments, ctx); 82 } 83 84 public ATClosure base_wrap(ATObject lexicalScope, ATObject dynamicReceiver) throws InterpreterException { 85 return new NATClosure(this, lexicalScope, dynamicReceiver); 86 } 87 88 public ATSymbol base_name() { return Evaluator._ANON_MTH_NAM_; } 89 90 public ATTable base_parameters() { return Evaluator._ANON_MTH_ARGS_; } 91 92 public ATBegin base_bodyExpression() { 93 return new AGBegin(NATTable.atValue(new ATObject[] { 94 AGSymbol.jAlloc("Native anonymous implementation in " + creatorClass_.getName())})); 95 } 96 97 public NATText meta_print() throws InterpreterException { 98 return NATText.atValue("<anonymous java method in "+creatorClass_.getName()+">"); 99 } 100 101 public ATTable meta_typeTags() throws InterpreterException { 102 return NATTable.of(NativeTypeTags._METHOD_); 103 } 104 105}