package com.exigen.ie.constrainer.impl;
import com.exigen.ie.constrainer.Constraint;
import com.exigen.ie.constrainer.ConstraintImpl;
import com.exigen.ie.constrainer.EventOfInterest;
import com.exigen.ie.constrainer.Failure;
import com.exigen.ie.constrainer.FloatEvent;
import com.exigen.ie.constrainer.FloatExp;
import com.exigen.ie.constrainer.Goal;
import com.exigen.ie.constrainer.IntBoolExp;
import com.exigen.ie.constrainer.Observer;
import com.exigen.ie.constrainer.Subject;
///////////////////////////////////////////////////////////////////////////////
/*
* Copyright Exigen Group 1998, 1999, 2000
* 320 Amboy Ave., Metuchen, NJ, 08840, USA, www.exigengroup.com
*
* The copyright to the computer program(s) herein
* is the property of Exigen Group, USA. All rights reserved.
* The program(s) may be used and/or copied only with
* the written permission of Exigen Group
* or in accordance with the terms and conditions
* stipulated in the agreement/contract under which
* the program(s) have been supplied.
*/
///////////////////////////////////////////////////////////////////////////////
//
//: ConstraintFloatExpMoreValue.java
//
/**
* An implementation of the constraint: <code>FloatExp >= value</code>.
*/
public final class ConstraintFloatExpMoreValue extends ConstraintImpl
{
// PRIVATE MEMBERS
private FloatExp _exp;
private double _value;
private Constraint _opposite;
public ConstraintFloatExpMoreValue(FloatExp exp, double value)
{
super(exp.constrainer(),"");//exp.name()+">="+value);
_name = "";
if (constrainer().showInternalNames())
_name = exp.name()+">="+value;
_exp = exp;
_value = value;
_opposite = null;
}
public Goal execute() throws Failure
{
class ObserverFloatMoreValue extends Observer
{
public void update(Subject exp, EventOfInterest interest) throws Failure
{
//Debug.on();Debug.print("ObserverFloatMoreValue: "+interest);Debug.off();
FloatEvent event = (FloatEvent)interest;
if(FloatCalc.gt (_value, event.max ())) {
// System.out.println("???ObserverFloatMoreValue: max < value: "+event.max()+"<"+_value);
exp.constrainer().fail("from ObserverFloatMoreValue");
}
_exp.setMin(_value);
}
public int subscriberMask()
{
return EventOfInterest.VALUE | EventOfInterest.MAX;
}
public String toString()
{
return "ObserverFloatMoreValue";
}
public Object master()
{
return ConstraintFloatExpMoreValue.this;
}
} //~ ObserverFloatMoreValue
_exp.setMin(_value); // may fail
_exp.attachObserver(new ObserverFloatMoreValue());
return null;
}
public Constraint opposite()
{
if (_opposite == null)
_opposite = new ConstraintFloatExpLessValue(_exp,_value);
return _opposite;
}
public boolean isLinear(){
return _exp.isLinear();
}
public IntBoolExp toIntBoolExp(){
return _exp.ge(_value);
}
public String toString()
{
return _exp+">="+_value;
}
} //eof ConstraintFloatExpMoreValue