?? astprepostclause.java
字號:
/* * USE - UML based specification environment * Copyright (C) 1999-2004 Mark Richters, University of Bremen * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *//* $ProjectHeader: use 2-3-0-release.1 Mon, 12 Sep 2005 20:18:33 +0200 green $ */package org.tzi.use.parser.use;import org.tzi.use.parser.AST;import org.tzi.use.parser.Context;import org.tzi.use.parser.MyToken;import org.tzi.use.parser.SemanticException;import org.tzi.use.parser.Symtable;import org.tzi.use.parser.ocl.ASTExpression;import org.tzi.use.uml.mm.MClass;import org.tzi.use.uml.mm.MInvalidModelException;import org.tzi.use.uml.mm.MOperation;import org.tzi.use.uml.mm.MPrePostCondition;import org.tzi.use.uml.ocl.expr.ExpInvalidException;import org.tzi.use.uml.ocl.expr.Expression;import org.tzi.use.uml.ocl.type.ObjectType;import org.tzi.use.uml.ocl.type.TypeFactory;/** * Node of the abstract syntax tree constructed by the parser. * * @version $ProjectVersion: 2-3-0-release.1 $ * @author Mark Richters */public class ASTPrePostClause extends AST { MyToken fToken; // pre or post MyToken fName; // optional ASTExpression fExpr; public ASTPrePostClause(MyToken tok, MyToken name, ASTExpression e) { fToken = tok; fName = name; fExpr = e; } void gen(Context ctx, MClass cls, MOperation op) { boolean isPre = fToken.getText().equals("pre"); // enter context variable into scope of invariant ObjectType ot = TypeFactory.mkObjectType(cls); Symtable vars = ctx.varTable(); vars.enterScope(); try { // create pseudo-variable "self" vars.add("self", ot, null); ctx.exprContext().push("self", ot); // add special variable `result' in postconditions with result value if (! isPre && op.hasResultType() ) vars.add("result", op.resultType(), null); ctx.setInsidePostCondition(! isPre); Expression expr = fExpr.gen(ctx); ctx.setInsidePostCondition(false); String ppcName = null; if (fName != null ) ppcName = fName.getText(); MPrePostCondition ppc = ctx.modelFactory().createPrePostCondition(ppcName, op, isPre, expr); if ( ppc != null && fName != null ) { ppc.setPositionInModel( fName.getLine() ); } ctx.model().addPrePostCondition(ppc); } catch (MInvalidModelException ex) { ctx.reportError(fExpr.getStartToken(), ex); } catch (ExpInvalidException ex) { ctx.reportError(fExpr.getStartToken(), ex); } catch (SemanticException ex) { ctx.reportError(ex); } vars.exitScope(); ctx.exprContext().pop(); }}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -