/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2013:
* 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.transformations;
import cc.redberry.core.number.Complex;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.core.tensor.iterator.FromChildToParentIterator;
/**
* Gives the numerical value of tensor (replace all numbers with their numerical values).
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
* @since 1.0
*/
public class ToNumericTransformation implements Transformation {
/**
* Singleton instance
*/
public static final ToNumericTransformation TO_NUMERIC = new ToNumericTransformation();
private ToNumericTransformation() {
}
@Override
public Tensor transform(Tensor t) {
return toNumeric(t);
}
/**
* Gives the numerical value of tensor (replace all numbers with their numerical values)
*
* @param t tensor
* @return the numerical value of tensor
*/
public static Tensor toNumeric(Tensor t) {
FromChildToParentIterator iterator = new FromChildToParentIterator(t);
Tensor c;
while ((c = iterator.next()) != null)
if (c instanceof Complex)
iterator.set(((Complex) c).getNumericValue());
return iterator.result();
}
}