/*
* 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.ec;
import cc.redberry.core.tensor.Product;
import cc.redberry.core.tensor.Sum;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.transformation.concurrent.TensorOP;
import java.util.concurrent.atomic.AtomicLong;
/**
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
*/
public final class ExpandPairOP implements TensorOP {
private final Tensor[] sum1, sum2;
private final AtomicLong atomicLong = new AtomicLong();
public ExpandPairOP(Sum s1, Sum s2) {
sum1 = s1.getContent().getDataCopy();
sum2 = s2.getContent().getDataCopy();
}
@Override
public Tensor take() throws InterruptedException {
long index = atomicLong.getAndIncrement();
if (index >= sum1.length * sum2.length)
return null;
int i1 = (int) (index / sum2.length);
int i2 = (int) (index % sum2.length);
return new Product(sum1[i1].clone(), sum2[i2].clone());
}
}