Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/vm/choice/TypedObjectChoice.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 |
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children | fdc263e5806b |
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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.vm.choice; import gov.nasa.jpf.Config; import gov.nasa.jpf.vm.ChoiceGeneratorBase; import gov.nasa.jpf.vm.ClassInfo; import gov.nasa.jpf.vm.ElementInfo; import gov.nasa.jpf.vm.Heap; import gov.nasa.jpf.vm.VM; import gov.nasa.jpf.vm.ReferenceChoiceGenerator; import java.util.ArrayList; /** * a choice generator that enumerates the set of all objects of a certain type. This * is a replacement for the old 'Verify.randomObject' */ public class TypedObjectChoice extends ChoiceGeneratorBase<Integer> implements ReferenceChoiceGenerator { // the requested object type protected String type; // the object references protected int[] values; // our enumeration state protected int count; public TypedObjectChoice (Config conf, String id) { super(id); Heap heap = VM.getVM().getHeap(); type = conf.getString(id + ".type"); if (type == null) { throw conf.exception("missing 'type' property for TypedObjectChoice " + id); } ArrayList<ElementInfo> list = new ArrayList<ElementInfo>(); for ( ElementInfo ei : heap.liveObjects()) { ClassInfo ci = ei.getClassInfo(); if (ci.isInstanceOf(type)) { list.add(ei); } } values = new int[list.size()]; int i = 0; for ( ElementInfo ei : list) { values[i++] = ei.getObjectRef(); } count = -1; } @Override public void advance () { count++; } @Override public int getProcessedNumberOfChoices () { return count+1; } @Override public int getTotalNumberOfChoices () { return values.length; } @Override public boolean hasMoreChoices () { return !isDone && (count < values.length-1); } @Override public void reset () { count = -1; isDone = false; } @Override public Integer getNextChoice () { if ((count >= 0) && (count < values.length)) { return new Integer(values[count]); } else { return new Integer(-1); } } @Override public String toString() { StringBuilder sb = new StringBuilder("TypedObjectChoice [id="); sb.append(id); sb.append(",type="); sb.append(type); sb.append(",values="); for (int i=0; i< values.length; i++) { if (i>0) { sb.append(','); } if (i == count) { sb.append("=>"); } sb.append(values[i]); } sb.append(']'); return sb.toString(); } @Override public TypedObjectChoice randomize() { for (int i = values.length - 1; i > 0; i--) { int j = random.nextInt(i + 1); int tmp = values[i]; values[i] = values[j]; values[j] = tmp; } return this; } @Override public Class<Integer> getChoiceType() { return Integer.class; } }