/interpreter/tags/at2dist130208/src/edu/vub/at/objects/natives/grammar/AGFieldSelectionCreation.java
Java | 87 lines | 36 code | 9 blank | 42 comment | 3 complexity | df181599ebaac29cd058122790066ba4 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * AGFieldSelectionCreation.java created on 26-jul-2006 at 16:18:10 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.grammar; 29 30import edu.vub.at.exceptions.InterpreterException; 31import edu.vub.at.objects.ATContext; 32import edu.vub.at.objects.ATMessage; 33import edu.vub.at.objects.ATObject; 34import edu.vub.at.objects.ATTable; 35import edu.vub.at.objects.grammar.ATExpression; 36import edu.vub.at.objects.grammar.ATFieldSelectionCreation; 37import edu.vub.at.objects.grammar.ATSymbol; 38import edu.vub.at.objects.natives.NATFieldSelection; 39import edu.vub.at.objects.natives.NATTable; 40import edu.vub.at.objects.natives.NATText; 41 42/** 43 * @author tvcutsem 44 * 45 * The native implementation of a first-class field creation AG element. 46 */ 47public final class AGFieldSelectionCreation extends AGMessageCreation 48 implements ATFieldSelectionCreation { 49 50 /** create a field selection based on a message creation AG element */ 51 public AGFieldSelectionCreation(ATSymbol sel, ATExpression annotations) { 52 super(sel, NATTable.EMPTY, annotations); 53 } 54 55 /** 56 * To evaluate a first-class field selection creation AG element, transform the selector 57 * and evaluated arguments into a first-class FieldSelection. 58 * It is important to note that the arguments are all eagerly evaluated. 59 * 60 * AGFSL(sel,ann).eval(ctx) = NATFS(sel, map eval(ctx) over ann) 61 * 62 * @return a first-class field selection object 63 */ 64 public ATMessage createMessage(ATContext ctx, ATSymbol selector, ATTable evaluatedArgs, ATTable annotations) throws InterpreterException { 65 return new NATFieldSelection(selector, 66 annotations); 67 } 68 69 70 protected ATObject newQuoted(ATSymbol quotedSel, ATTable quotedArgs, ATExpression quotedAnnotations) { 71 return new AGFieldSelectionCreation(quotedSel, quotedAnnotations); 72 } 73 74 protected String getMessageToken() { return "."; } 75 76 public NATText meta_print() throws InterpreterException { 77 if (base_annotations() == NATTable.EMPTY) { 78 return NATText.atValue(this.getMessageToken() + 79 base_selector().meta_print().javaValue); 80 } else { 81 return NATText.atValue(this.getMessageToken() + 82 base_selector().meta_print().javaValue + 83 "@" + base_annotations().meta_print().javaValue); 84 } 85 } 86 87}