/* * This is source code of the Snapshot Generator, an extension for USE * to generate (valid) system states of UML models. * Copyright (C) 2001 Joern Bohling, University of Bremen * * About USE: *   USE - UML based specification environment *   Copyright (C) 1999,2000,2001 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. *//** * March 22th 2001  * @author  Joern Bohling */package org.tzi.use.gen.assl.dynamics;import org.tzi.use.gen.assl.statics.GInstrDelete_Object;import org.tzi.use.uml.ocl.value.Value;import org.tzi.use.uml.sys.MCmd;import org.tzi.use.uml.sys.MCmdDestroyObjects;import org.tzi.use.util.cmd.CommandFailedException;import org.tzi.use.util.cmd.CannotUndoException;import org.tzi.use.uml.ocl.expr.Expression;import org.tzi.use.uml.ocl.expr.ExpressionWithValue;class GEvalInstrDelete_Object extends GEvalInstruction    implements IGCaller {    private GInstrDelete_Object fInstr;    private IGCaller fCaller;    public GEvalInstrDelete_Object(GInstrDelete_Object instr ) {        fInstr = instr;    }    public void eval(GConfiguration conf,                     IGCaller caller,                     IGCollector collector) throws GEvaluationException {        collector.detailPrintWriter().println("evaluating `" + fInstr + "'");        fCaller = caller;        GCreator.createFor(fInstr.objectInstr()).eval(conf,this,collector );    }    public void feedback( GConfiguration conf,                          Value value,                          IGCollector collector ) throws GEvaluationException {        if (value.isUndefined()) {            collector.invalid(                              buildCantExecuteMessage(fInstr,fInstr.objectInstr()) );            return;        }        Expression[] exprs = {new ExpressionWithValue( value )};        MCmd cmd = new MCmdDestroyObjects(conf.systemState(), exprs );        try {            collector.basicPrintWriter().println(cmd.getUSEcmd());            cmd.execute();            //conf.varBindings().push(fInstr.target(), value);            fCaller.feedback( conf, null, collector );            if (collector.expectSubsequentReporting()) {                collector.subsequentlyPrependCmd( cmd );            }            collector.basicPrintWriter().println("undo: " + cmd.getUSEcmd());            cmd.undo();        } catch (CommandFailedException e) {            collector.invalid(e);        } catch (CannotUndoException e) {            throw new GEvaluationException(e);        }    }    public String toString() {        return "GEvalInstrDelete_Object";    }}