/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2012:
* Stanislav Poslavsky <stvlpos@mail.ru>
* Bolotin Dmitriy <bolotin.dmitriy@gmail.com>
*
* This file is part of Redberry.
*
* Redberry is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Redberry 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 Redberry. If not, see <http://www.gnu.org/licenses/>.
*/
package cc.redberry.core.combinatorics.symmetries;
import cc.redberry.core.combinatorics.Symmetry;
import cc.redberry.core.utils.SingleIterator;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
/**
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
*/
class EmptySymmetries extends DummySymmetries {
EmptySymmetries(int dimension) {
super(dimension,
Collections.unmodifiableList(Arrays.asList(new Symmetry(dimension))));
assert dimension == 0 || dimension == 1;
}
@Override
public List<Symmetry> getBasisSymmetries() {
return basis;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public Iterator<Symmetry> iterator() {
return new SingleIterator<>(basis.get(0));
}
}