Java Stream of streamEquals(Stream a, Stream b)

Description

stream Equals

License

Open Source License

Declaration

public static <T> boolean streamEquals(Stream<T> a, Stream<T> b) 

Method Source Code

//package com.java2s;
/*/*from ww w.j  a  va2 s .com*/
 * Copyright (C) 2015 Daniel Dietsch (dietsch@informatik.uni-freiburg.de)
 * Copyright (C) 2015 University of Freiburg
 * 
 * This file is part of the ULTIMATE licence-manager.
 * 
 * The ULTIMATE licence-manager is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * The ULTIMATE licence-manager 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with the ULTIMATE licence-manager. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Additional permission under GNU GPL version 3 section 7:
 * If you modify the ULTIMATE licence-manager, or any covered work, by linking
 * or combining it with Eclipse RCP (or a modified version of Eclipse RCP), 
 * containing parts covered by the terms of the Eclipse Public License, the 
 * licensors of the ULTIMATE licence-manager grant you additional permission 
 * to convey the resulting work.
 */

import java.util.Iterator;
import java.util.stream.Stream;

public class Main {
    public static <T> boolean streamEquals(Stream<T> a, Stream<T> b) {
        if (a == null && b == null) {
            return true;
        }
        if (a == null || b == null) {
            return false;
        }

        final Iterator<T> iterA = a.iterator();
        final Iterator<T> iterB = b.iterator();

        while (iterA.hasNext() && iterB.hasNext()) {
            final T nextA = iterA.next();
            final T nextB = iterB.next();

            if (nextA != null && nextB != null) {
                if (!nextA.equals(nextB)) {
                    return false;
                }

            } else if (nextA == null && nextB == null) {
                continue;
            } else {
                return false;
            }
        }

        if (iterA.hasNext() || iterB.hasNext()) {
            return false;
        }

        return true;
    }
}

Related

1. stream(Iterable iterable)
2. stream(Iterable iterable)
3. stream(Iterable it)
4. stream(Iterator iterator)
5. stream(Object values)
6. streamInt(int max)
7. streamOf (final Iterable iterable)
8. streamOf(Iterable it)
9. streamOf(Iterable iterable)