TokenUtils.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it).
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openspcoop2.pdd.core.token.parser;

import java.math.BigDecimal;
import java.util.Date;

/**     
 * TokenUtils
 *
 * @author Poli Andrea (poli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class TokenUtils {
    
    private TokenUtils() {}

    public static Date convertLifeTimeInSeconds(Date now, String exp) {
        if(exp!=null) {
            /**System.out.println("PARSE ["+exp+"]");*/
            
            // The lifetime in seconds of the access token.  For example, the value "3600" denotes that the access token will
            // expire in one hour from the time the response was generated.
            
            //BigInteger expIn = new BigInteger(exp); // Fix: per gestire formati con esponenti
            BigDecimal expIn = new BigDecimal(exp);
            long lMs = 0;
            try {
                @SuppressWarnings("unused")
                long lSeconds = expIn.longValueExact();
                expIn = expIn.multiply(BigDecimal.valueOf(1000l)); // trasformo in millisecondi
                lMs = expIn.longValueExact();
            }catch(ArithmeticException ae) {
                /**System.out.println("PARSE OVERFLOW ["+exp+"]");*/
                expIn = BigDecimal.valueOf(Long.MAX_VALUE);
                lMs = expIn.longValueExact();
                return new Date(lMs);
            }
            
            if(lMs>0) {
                
                try {
                    expIn = expIn.add(BigDecimal.valueOf(now.getTime()));
                    lMs = expIn.longValueExact();
                }catch(ArithmeticException ae) {
                    /**System.out.println("PARSE OVERFLOW 2 ["+exp+"]");*/
                    expIn = BigDecimal.valueOf(Long.MAX_VALUE);
                    lMs = expIn.longValueExact();
                }
                                
                return new Date(lMs);
            }
        }
        return null;
    }

    public static Date parseTimeInSecond(String dateS) {
        if(dateS!=null) {
            
            /**System.out.println("PARSE ["+dateS+"]");*/
            
            //BigInteger date = new BigInteger(dateS); // Fix: per gestire formati con esponenti: es. 1.676363172E9
            BigDecimal date = new BigDecimal(dateS);
            long lMs = 0;
            try {
                @SuppressWarnings("unused")
                long lSeconds = date.longValueExact();
                date = date.multiply(BigDecimal.valueOf(1000l)); // trasformo in millisecondi
                lMs = date.longValueExact();
            }catch(ArithmeticException ae) {
                /**System.out.println("PARSE OVERFLOW ["+dateS+"]");*/
                date = BigDecimal.valueOf(Long.MAX_VALUE);
                lMs = date.longValueExact();
            }
            if(lMs>0) {
                return new Date(lMs);
            }
        }
        return null;
    }
    
}