/*******************************************************************************
*
* Copyright (C) 2008 Fujitsu Services Ltd.
*
* Author: Nick Battle
*
* This file is part of VDMJ.
*
* VDMJ 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 3 of the License, or
* (at your option) any later version.
*
* VDMJ 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 VDMJ. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
package org.overture.interpreter.values;
import java.util.Set;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.types.ARealNumericBasicType;
import org.overture.ast.types.PType;
import org.overture.interpreter.runtime.Context;
import org.overture.interpreter.runtime.ValueException;
public class RealValue extends NumericValue
{
private static final long serialVersionUID = 1L;
public RealValue(double value) throws Exception
{
super(value);
if (Double.isInfinite(value))
{
throw new Exception("Real is infinite");
} else if (Double.isNaN(value))
{
throw new Exception("Real is NaN");
}
}
public RealValue(long value)
{
super(value);
}
@Override
public int compareTo(Value other)
{
if (other instanceof RealValue)
{
RealValue ro = (RealValue) other;
return (int) Math.round(Math.signum(value - ro.value));
}
return super.compareTo(other);
}
@Override
public double realValue(Context ctxt)
{
return value;
}
@Override
public double ratValue(Context ctxt)
{
return value;
}
@Override
public long intValue(Context ctxt) throws ValueException
{
long rounded = Math.round(value);
if (rounded != value)
{
abort(4075, "Value " + value + " is not an integer", ctxt);
}
return rounded;
}
@Override
public long nat1Value(Context ctxt) throws ValueException
{
long rounded = Math.round(value);
if (rounded != value || rounded < 1)
{
abort(4076, "Value " + value + " is not a nat1", ctxt);
}
return rounded;
}
@Override
public long natValue(Context ctxt) throws ValueException
{
long rounded = Math.round(value);
if (rounded != value || rounded < 0)
{
abort(4077, "Value " + value + " is not a nat", ctxt);
}
return rounded;
}
@Override
public String toString()
{
return Double.toString(value);
}
@Override
public int hashCode()
{
return new Double(value).hashCode();
}
@Override
public String kind()
{
return "real";
}
@Override
protected Value convertValueTo(PType to, Context ctxt, Set<PType> done)
throws AnalysisException
{
if (to instanceof ARealNumericBasicType)
{
return this;
} else
{
return super.convertValueTo(to, ctxt, done);
}
}
@Override
public Object clone()
{
try
{
return new RealValue(value);
} catch (Exception e)
{
// Can't happen?
return null;
}
}
}