Examples of cc.redberry.core.combinatorics.IntCombinationPermutationGenerator

cc.redberry.core.combinatorics.IntCombinationPermutationGenerator
This class represents an iterator over over all possible unique combinations (with permutations, i.e. {0,1} and {1,0} both will appear in the iteration) of {@code k} numbers, which can be chosen from the set of {@code n} numbers, numbered in the order0,1,2,..., {@code n}. The total number of such combinations will be {@code n!/(n-k)!}.

For example, for {@code k=2} and {@code n=3}, it will iterate over the following arrays: [0,1], [1,0], [0,2], [2,0], [1,2], [2,1].

The iterator is implemented such that each next combination will be calculated only on the invocation of method {@link #next()}.

Note: method {@link #next()} returns the same reference on each invocation.So, if it is needed not only to obtain the information from {@link #next()}, but also save the result, it is necessary to clone the returned array.

Inner implementation of this class is simply uses the combination of {@link IntCombinationsGenerator}and {@link IntPermutationsGenerator}.
@author Dmitry Bolotin @author Stanislav Poslavsky @see IntCombinationsGenerator @see IntPermutationsGenerator @since 1.0


        public AbstractStretchMapper(Tensor[] from, Tensor[] to, int fromPointer) {
            this.from = from;
            this.to = to;
            this.fromPointer = fromPointer;
            this.permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
        }

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            currentPermutation = permutationGenerator.next();
        }


        @Override
        public void reset() {
            permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
            currentPermutation = permutationGenerator.next();
        }

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        public AbstractStretchMapper(Tensor[] from, Tensor[] to, int fromPointer) {
            this.from = from;
            this.to = to;
            this.fromPointer = fromPointer;
            this.permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
        }

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            currentPermutation = permutationGenerator.next();
        }


        @Override
        public void reset() {
            permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
            currentPermutation = permutationGenerator.next();
        }

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        public AbstractStretchMapper(Tensor[] from, Tensor[] to, int fromPointer) {
            this.from = from;
            this.to = to;
            this.fromPointer = fromPointer;
            this.permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
        }

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            currentPermutation = permutationGenerator.next();
        }


        @Override
        public void reset() {
            permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
            currentPermutation = permutationGenerator.next();
        }

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        public AbstractStretchMapper(Tensor[] from, Tensor[] to, int fromPointer) {
            this.from = from;
            this.to = to;
            this.fromPointer = fromPointer;
            this.permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
        }

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            currentPermutation = permutationGenerator.next();
        }


        @Override
        public void reset() {
            permutationGenerator = new IntCombinationPermutationGenerator(to.length, from.length);
            currentPermutation = permutationGenerator.next();
        }

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Related Classes of cc.redberry.core.combinatorics.IntCombinationPermutationGenerator

cc.redberry.core.transformations.substitutions.SumBijectionPort$AbstractStretchMapper

cc.redberry.core.transformations.substitutions.SumBijectionPort$StretchPairMapper

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