it.ssc.pl.milp.util.A_DataMatrix Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jsr331-ssc Show documentation

This is a JSR331 interface for SSC (Software for the Calculation of the Simplex) is a java library for solving linear programming problems v. 3.0.1. SSC was designed and developed by Stefano Scarioli.

The newest version!

package it.ssc.pl.milp.util;



import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import java.util.Random;
import it.ssc.io.FileNotFound;
import it.ssc.io.UtilFile;

public class A_DataMatrix {
	
	/*
	 * Questa matrice deve memorizzare la tabella standard. 
	 * Il nome da dare alla matrice non deve esistere e sara dato da 
	 * A_numero_casuale. La creazione avverra nel costruttore , per cui per 
	 * accedere alla matrice occorre sempre avere il riferimento dell'oggetto. 
	 * La matrice verra creata nel path, che per adesso e definita come l'area di 
	 * work della sessione.  
	 */
	
	private int nRow;
	private int nCol;
	private File file;
	private double[] tempRowI;
	private DataInputStream input;
	public int getnRow() {
		return nRow;
	}

	public int getnCol() {
		return nCol;
	}


	public A_DataMatrix(double[][] A, String path) throws FileNotFoundException, IOException {
		this.nRow=A.length;
		this.nCol=A[0].length;
		tempRowI = new double[nCol];
		file=createRandomNameFile(path);
		DataOutputStream out=getDataOutputStream(file);
		writeDataFromArray(A,out);
		out.close();
	}
	
	private void writeDataFromArray(double[][] A,DataOutputStream out) throws IOException {
		for(int i=0;i= nRow) throw new java.lang.ArrayIndexOutOfBoundsException("Riga della matrice fuori indice");
		if(row==0) input=getDataInputStream(file);
		
		for (int i = 0; i < tempRowI.length; i++) {
			tempRowI[i] = input.readDouble();
		}
		if(row==(nRow-1)) input.close();
		return tempRowI;
	}
	
	public void close() throws IOException {
		if(input!=null) input.close();
		this.tempRowI=null;
	}
	
}