/*
 * Redberry: symbolic tensor computations.
 *
 * Copyright (c) 2010-2015:
 *   Stanislav Poslavsky   
 *   Bolotin Dmitriy       
 *
 * 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 .
 */
package cc.redberry.core.tensor;

import cc.redberry.core.indices.Indices;
import cc.redberry.core.number.Complex;
import gnu.trove.map.hash.TIntObjectHashMap;

import java.util.List;

/**
 * Basic builder for sums. The implementation puts terms together as described in specification.
 *
 * @author Dmitry Bolotin
 * @author Stanislav Poslavsky
 * @since 1.0
 */
public final class SumBuilder extends AbstractSumBuilder {

    public SumBuilder(int initialCapacity) {
        super(initialCapacity);
    }

    public SumBuilder() {
    }

    SumBuilder(TIntObjectHashMap> summands, Complex complex, Indices indices, int[] sortedFreeIndices) {
        super(summands, complex, indices, sortedFreeIndices);
    }

    @Override
    protected Split split(Tensor tensor) {
        return Split.splitIndexless(tensor);
    }

    @Override
    public TensorBuilder clone() {
        TIntObjectHashMap> summands = new TIntObjectHashMap<>(this.summands);
        for (List vals : summands.valueCollection())
            for (int i = vals.size() - 1; i >= 0; --i)
                vals.set(i, vals.get(i).clone());
        return new SumBuilder(summands, complex, indices, sortedFreeIndices.clone());
    }
}