Package org.projog.core.predicate.udp

Class Indexes

  • final class Indexes
extends java.lang.Object
    Supports term indexing of user defined predicates.

    See: https://en.wikipedia.org/wiki/Prolog#Term_indexing

    • Field Detail

      • MAX_INDEXABLE_ARGS

        private static final int MAX_INDEXABLE_ARGS
        Maximum number of arguments of a clause that will be considered indexable.

        Note that this is not the same as the maximum number of arguments that can be included in a single index.

        See Also:
        Constant Field Values

      • lock

        private final java.lang.Object lock

      • indexes

        private final java.lang.ref.SoftReference<Index>[] indexes

      • indexableArgs

        private final int[] indexableArgs

      • numIndexableArgs

        private final int numIndexableArgs

    • Constructor Detail

      • Indexes

        Indexes​(Clauses clauses)

    • Method Detail

      • getClauseCount

        int getClauseCount()

      • createBitmask

        private int createBitmask​(Term[] args)

      • getOrCreateIndex

        public Index getOrCreateIndex​(int bitmask)

      • createIndex

        private Index createIndex​(int bitmask)

      • createPositionsFromBitmask

        private int[] createPositionsFromBitmask​(int bitmask)

      • groupDataByPositions

        private java.util.Map<java.lang.Object,​java.util.List<ClauseAction>> groupDataByPositions​(int[] positions)

      • convertListsToArrays

        private java.util.Map<java.lang.Object,​ClauseAction[]> convertListsToArrays​(java.util.Map<java.lang.Object,​java.util.List<ClauseAction>> map)

      • countReferences

        int countReferences()

      • countClearedReferences

        int countClearedReferences()