Class SimpleUnaryTable<Value>

    • Constructor Detail

      • SimpleUnaryTable

        public SimpleUnaryTable​(IInputKey inputKey,
                                ITableContext tableContext,
                                boolean unique)
        Parameters:
        unique - client promises to only insert a given tuple with multiplicity one
    • Method Detail

      • write

        public void write​(Direction direction,
                          Value value)
        Description copied from interface: ITableWriterUnary
        Adds/removes a row to/from the table.
        Specified by:
        write in interface ITableWriterUnary<Value>
        Parameters:
        direction - tells whether putting a row into the table or deleting TODO: store as multiset, return bool?
      • containsTuple

        public boolean containsTuple​(ITuple seed)
        Description copied from interface: IIndexTable
        Simpler form of IIndexTable.enumerateTuples(TupleMask, ITuple) in the case where all values of the tuples are bound by the seed.

        Returns whether the given tuple is in the table identified by the input key.

        Specified by:
        containsTuple in interface IIndexTable
        Parameters:
        seed - a row tuple of fixed values whose presence in the table is queried
        Returns:
        true iff there is a row tuple contained in the table that corresponds to the given seed
      • countTuples

        public int countTuples​(TupleMask seedMask,
                               ITuple seed)
        Description copied from interface: IIndexTable
        Returns the number of tuples, optionally seeded with the given tuple.

        Selects the tuples in the table, optionally seeded with the given tuple, and then returns their number.

        Specified by:
        countTuples in interface IIndexTable
        Parameters:
        seedMask - a mask that extracts those parameters of the input key (from the entire parameter list) that should be bound to a fixed value; must not be null. Note: any given index must occur at most once in seedMask.
        seed - the tuple of fixed values restricting the row set to be considered, in the same order as given in parameterSeedMask, so that for each considered row tuple, projectedParameterSeed.equals(parameterSeedMask.transform(row)) should hold. Must not be null.
        Returns:
        the number of tuples in the table for the given key and seed
      • estimateProjectionSize

        public java.util.Optional<java.lang.Long> estimateProjectionSize​(TupleMask groupMask,
                                                                         Accuracy requiredAccuracy)
        Description copied from interface: IIndexTable
        Gives an estimate of the number of different groups the tuples of the table are projected into by the given mask (e.g. for an identity mask, this means the full relation size). The estimate must meet the required accuracy.

        Derived tables may return Optional.empty() if it would be costly to provide an answer up to the required precision. Direct storage tables are expected to always be able to give an exact count.

        PRE: TupleMask.isNonrepeating() must hold for the group mask.

        Specified by:
        estimateProjectionSize in interface IIndexTable
      • streamTuples

        public java.util.stream.Stream<? extends Tuple> streamTuples​(TupleMask seedMask,
                                                                     ITuple seed)
        Description copied from interface: IIndexTable
        Returns the tuples, optionally seeded with the given tuple.
        Specified by:
        streamTuples in interface IIndexTable
        Parameters:
        seedMask - a mask that extracts those parameters of the input key (from the entire parameter list) that should be bound to a fixed value; must not be null. Note: any given index must occur at most once in seedMask.
        seed - the tuple of fixed values restricting the row set to be considered, in the same order as given in parameterSeedMask, so that for each considered row tuple, projectedParameterSeed.equals(parameterSeedMask.transform(row)) should hold. Must not be null.
        Returns:
        the tuples in the table for the given key and seed
      • enumerateValues

        public java.lang.Iterable<? extends java.lang.Object> enumerateValues​(TupleMask seedMask,
                                                                              ITuple seed)
        Description copied from interface: IIndexTable
        Simpler form of IIndexTable.enumerateTuples(TupleMask, ITuple) in the case where all values of the tuples are bound by the seed except for one.

        Selects the tuples in the table, optionally seeded with the given tuple, and then returns the single value from each tuple which is not bound by the seed mask.

        Consider using the more idiomatic IIndexTable.streamValues(TupleMask, ITuple) instead.

        Specified by:
        enumerateValues in interface IIndexTable
        Parameters:
        seedMask - a mask that extracts those parameters of the input key (from the entire parameter list) that should be bound to a fixed value; must not be null. Note: any given index must occur at most once in seedMask, and seedMask must include all parameters in any arbitrary order except one.
        seed - the tuple of fixed values restricting the row set to be considered, in the same order as given in parameterSeedMask, so that for each considered row tuple, projectedParameterSeed.equals(parameterSeedMask.transform(row)) should hold. Must not be null.
        Returns:
        the objects in the table for the given key and seed
      • streamValues

        public java.util.stream.Stream<? extends java.lang.Object> streamValues​(TupleMask seedMask,
                                                                                ITuple seed)
        Description copied from interface: IIndexTable
        Simpler form of IIndexTable.enumerateTuples(TupleMask, ITuple) in the case where all values of the tuples are bound by the seed except for one.

        Selects the tuples in the table, optionally seeded with the given tuple, and then returns the single value from each tuple which is not bound by the seed mask.

        Specified by:
        streamValues in interface IIndexTable
        Parameters:
        seedMask - a mask that extracts those parameters of the input key (from the entire parameter list) that should be bound to a fixed value; must not be null. Note: any given index must occur at most once in seedMask, and seedMask must include all parameters in any arbitrary order except one.
        seed - the tuple of fixed values restricting the row set to be considered, in the same order as given in parameterSeedMask, so that for each considered row tuple, projectedParameterSeed.equals(parameterSeedMask.transform(row)) should hold. Must not be null.
        Returns:
        the objects in the table for the given key and seed