/*
 * 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;

import gov.nasa.jpf.JPFException;

/**
 * fieldinfo for slots holding booleans
 */
public class BooleanFieldInfo extends SingleSlotFieldInfo {

  boolean init=false;

  public BooleanFieldInfo (String name, int modifiers) {
     super(name, "Z", modifiers);
  }

  @Override
  public void setConstantValue(Object constValue){
    if (constValue instanceof Integer){
      cv = constValue;
      init = ((Integer)constValue).intValue() == 1;
      
    } else {
      throw new JPFException("illegal boolean ConstValue=" + constValue);
    }
  }

  @Override
  public void initialize (ElementInfo ei, ThreadInfo ti) {
    ei.getFields().setBooleanValue(storageOffset, init);
  }

  @Override
  public boolean isBooleanField() {
    return true;
  }

  @Override
  public Object getValueObject (Fields f){
    int i = f.getIntValue(storageOffset);
    return new Boolean(i != 0);
  }

  @Override
  public String valueToString (Fields f) {
    boolean b = f.getBooleanValue(storageOffset);
    return Boolean.toString(b);
  }

}