Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/util/event/CheckEvent.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
parents | |
children | caa0924e093d |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is licensed under the * Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package gov.nasa.jpf.util.event; import gov.nasa.jpf.vm.MJIEnv; /** * a pseudo event that encapsulates a (possibly composed) check * * This event type uses 'alt' for disjunction and 'next' for conjunction if * they point to CheckEvents */ public abstract class CheckEvent extends Event { protected CheckEvent (String name, Object... arguments){ super(name, arguments); } public abstract boolean evaluate(MJIEnv env); public boolean check (MJIEnv env){ if (!evaluate(env)){ if (alt != null && alt instanceof CheckEvent){ return ((CheckEvent)alt).check(env); } else { return false; } } else { if (next != null && next instanceof CheckEvent){ return ((CheckEvent)next).check(env); } else { return true; } } } public CheckEvent or (CheckEvent orCheck){ addAlternative(orCheck); return this; } public CheckEvent and (CheckEvent andCheck){ addNext( andCheck); return this; } public String getExpression(){ if (alt == null && !(next instanceof CheckEvent)){ return toString(); } else { StringBuilder sb = new StringBuilder(); sb.append('('); sb.append(name); for (Event e = alt; e != null; e = e.alt){ sb.append( " || "); sb.append(e.name); } for (Event e = next; e instanceof CheckEvent; e = e.next){ sb.append( " && "); sb.append(e.name); } sb.append(')'); return sb.toString(); } } }