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/* Copyright (C) 2007 VRTech Industrial Technologies - www.vrtech.com.br.
* Copyright (C) 2007 Tong Kewei, Beihang University, - www.buaa.edu.cn.
* All Rights Reserved.
* This code is published under the Eclipse Public License.
*/
import org.coinor.Ipopt;
/**
* Abstract class for the scalable problems.
*
* Implementations should derive from this class and implement
* {@link #initialize(int)} where all problem size, bounds, and inital guess
* should be initialized. Besides the initialization, the abstract functions for
* evaluation of objective, bounds, etc need to be implemented.
*
* @author Rafael de Pelegrini Soares, Tong Kewei
*/
public abstract class Scalable extends Ipopt
{
// Problem sizes
int n;
int m;
int nnz_jac_g;
int nnz_h_lag;
// The bounds
double x_l[], x_u[];
double g_l[], g_u[];
// the index style
int index_style;
// The initial guess and solution
double x[];
private String name;
protected double gl;
protected double gu;
/** Constructor.
* @param name name of example
* @param gl the constraint lower bound value for all elements of g
* @param gu the constraint upper bound value for all elements of g
*/
public Scalable(
String name,
double gl,
double gu)
{
this.name = name;
this.gl = gl;
this.gu = gu;
}
public String toString()
{
return name;
}
/** In this function all problem sizes, bounds and initial guess should be initialized.
*
* @param n the problem size
*
* @return true if the given size is valid for this problem
*/
abstract public boolean initialize(
int n
);
/** Creates the problem based on the already computed problem sizes and bounds.
*/
public void create()
{
super.create(n, m, nnz_jac_g, nnz_h_lag, index_style);
}
public double[] getInitialGuess()
{
return x;
}
protected void print(
double[] x,
String str)
{
System.out.println(str);
for( int i = 0; i < x.length; ++i )
{
System.out.println(x[i]);
}
System.out.println();
}
}
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