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Ice is a comprehensive RPC framework that helps you build distributed applications with minimal effort using familiar object-oriented idioms
// **********************************************************************
//
// Copyright (c) 2003-2018 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package Ice;
/**
* Manages an optional double parameter.
**/
public class DoubleOptional
{
/**
* The value defaults to unset.
**/
public DoubleOptional()
{
_isSet = false;
}
/**
* Sets the value to the given argument.
*
* @param v The initial value.
**/
public DoubleOptional(double v)
{
_value = v;
_isSet = true;
}
/**
* Sets the value to a shallow copy of the given optional.
*
* @param opt The source value.
**/
public DoubleOptional(DoubleOptional opt)
{
_value = opt._value;
_isSet = opt._isSet;
}
/**
* Obtains the current value.
*
* @return The current value.
* @throws IllegalStateException If the value is not set.
**/
public double get()
{
if(!_isSet)
{
throw new IllegalStateException("no value is set");
}
return _value;
}
/**
* Sets the value to the given argument.
*
* @param v The new value.
**/
public void set(double v)
{
_value = v;
_isSet = true;
}
/**
* If the given argument is set, this optional is set to a shallow copy of the argument,
* otherwise this optional is unset.
*
* @param opt The source value.
**/
public void set(DoubleOptional opt)
{
_value = opt._value;
_isSet = opt._isSet;
}
/**
* Determines whether the value is set.
*
* @return True if the value is set, false otherwise.
**/
public boolean isSet()
{
return _isSet;
}
/**
* Unsets this value.
**/
public void clear()
{
_isSet = false;
_value = 0;
}
private double _value;
private boolean _isSet;
}