/*
* 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.transformation.collect;
import cc.redberry.core.tensor.Product;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.core.tensor.TensorNumber;
import cc.redberry.core.tensor.testing.TTest;
/**
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
*/
public class ScalarsSplit extends Split<ScalarsSplit> {
private final TensorNumber factoredNumber;
private final boolean termIsOne;
public ScalarsSplit(TensorNumber factoredNumber, Tensor term) {
this.factoredNumber = factoredNumber.clone();
this.term = term;
termIsOne = false;
}
public ScalarsSplit(TensorNumber factoredNumber) {
this.factoredNumber = factoredNumber.clone();
this.term = TensorNumber.createONE();
termIsOne = true;
}
@Override
public boolean canMerge(ScalarsSplit split) {
//return TTest.testParity(term, split.term);
return TTest.testEquals(term, split.term);
}
@Override
public void mergeFrom(ScalarsSplit split) {
factoredNumber.add(split.factoredNumber);
}
@Override
public Tensor tensorEquvivalent() {
//TODO discover case, when factoredNumber == 0
if (factoredNumber.isOne())
return term;
if (termIsOne)
return factoredNumber;
return new Product(factoredNumber, term);
}
}