//* Licensed Materials - Property of *
//* IBM *
//* *
//* eu.abc4trust.pabce.1.34 *
//* *
//* (C) Copyright IBM Corp. 2014. All Rights Reserved. *
//* US Government Users Restricted Rights - Use, duplication or *
//* disclosure restricted by GSA ADP Schedule Contract with IBM Corp. *
//* *
//* This file is licensed under the Apache License, Version 2.0 (the *
//* "License"); you may not use this file except in compliance with *
//* the License. You may obtain a copy of the License at: *
//* http://www.apache.org/licenses/LICENSE-2.0 *
//* Unless required by applicable law or agreed to in writing, *
//* software distributed under the License is distributed on an *
//* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
//* KIND, either express or implied. See the License for the *
//* specific language governing permissions and limitations *
//* under the License. *
//*/**/****************************************************************
package eu.abc4trust.util;
import java.math.BigInteger;
import java.net.URI;
public class ContextGeneratorSequential implements ContextGenerator{
private int counter;
public ContextGeneratorSequential() {
counter = 0;
System.out.println("*** Using sequential ContextGenerator *** DO NOT USE IN PRODUCTION");
}
@Override
public URI getUniqueContext(URI prefix) {
counter++;
return URI.create(prefix + "/" + counter);
}
@Override
public BigInteger getRandomNumber(long bits) {
counter++;
// return 2^bits - counter
return BigInteger.valueOf(2).pow((int) bits).add(BigInteger.valueOf(-counter));
}
}