/*
* 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.tensor.testing;
import cc.redberry.concurrent.OutputPortUnsafe;
import cc.redberry.core.context.CC;
import cc.redberry.core.indices.IndicesUtils;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.core.indexmapping.IndexMappingBuffer;
import cc.redberry.core.indexmapping.IndexMappingBufferTester;
import cc.redberry.core.indexmapping.IndexMappings;
/**
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
*/
public class TestOpposite implements TensorTest{
public static final TestOpposite INSTANCE = new TestOpposite();
private TestOpposite() {
}
@Override
public boolean test(Tensor... arr) {
if (arr.length < 2)
throw new IllegalArgumentException();
for (int i = 1; i < arr.length; ++i)
if (!compare(arr[0], arr[i]))
return false;
return true;
}
private boolean compare(Tensor from, Tensor to) {
int[] fromIndices = from.getIndices().getFreeIndices().getAllIndices().copy();
for (int i = 0; i < fromIndices.length; ++i)
fromIndices[i] = IndicesUtils.getNameWithType(fromIndices[i]);
OutputPortUnsafe<IndexMappingBuffer> provider = IndexMappings.createPort(new IndexMappingBufferTester(fromIndices, CC.withMetric()), from, to);
IndexMappingBuffer buffer;
if ((buffer = provider.take()) != null) {
buffer.removeContracted();
assert buffer.isEmpty();
return buffer.getSignum() == true;
}
return false;
}
}