Examples of cc.redberry.core.indexmapping.IndexMappingBuffer

cc.redberry.core.indexmapping.IndexMappingBuffer
Intermediate representation of mapping of indices needed inside the index mapping calculation pipeline (the basic implementation idea could be found in the description of {@link IndexMappingProvider}). @author Dmitry Bolotin @author Stanislav Poslavsky @since 1.0

            //symmetries of eps indices, which are contracted with other product (also totally antisymmetric)
            Map<IntArray, Boolean> symmetries = getEpsilonSymmetries(indices.length);


            //symmetries of product, which is contracted with Levi-Civita
            MappingsPort port = IndexMappings.createPort(temp, temp);
            IndexMappingBuffer buffer;
            Symmetry sym;


            //check for two symmetric indices of product contracted with two antisymmetric indices of eps
            while ((buffer = port.take()) != null) {
                //symmetry of product indices

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            //symmetries of eps indices, which are contracted with other product (also totally antisymmetric)
            Map<IntArray, Boolean> symmetries = getEpsilonSymmetries(indices.length);


            //symmetries of product, which is contracted with Levi-Civita
            MappingsPort port = IndexMappings.createPort(temp, temp);
            IndexMappingBuffer buffer;
            Symmetry sym;


            //check for two symmetric indices of product contracted with two antisymmetric indices of eps
            while ((buffer = port.take()) != null) {
                //symmetry of product indices

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        Tensor current;
        while ((state = iterator.next()) != null) {
            if (state != TraverseState.Leaving)
                continue;
            current = iterator.current();
            IndexMappingBuffer buffer = IndexMappings.getFirst(from, current);
            if (buffer != null) {
                Tensor newFrom = ApplyIndexMapping.applyIndexMapping(to, buffer);
                iterator.set(newFrom);
            }
        }

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