Package org.apache.derby.iapi.store.raw

Class RowLock

  • public final class RowLock
extends java.lang.Object
    A RowLock represents a qualifier that is to be used when locking a Row through a RecordHandle.
    MT - Immutable
    See Also:
    RecordHandle, LockingPolicy

    • Field Detail

      • type

        private final int type
        Integer representation of the type of the lock.

      • typeBit

        private final int typeBit
        Bit mask with one bit set. The position of the bit tells the type of the lock.

      • compat

        private final int compat
        Bit mask which represents the lock types that are compatible with this lock type.

      • shortnames

        private static final java.lang.String[] shortnames

      • R_COMPAT

        private static final boolean[][] R_COMPAT
        Row lock compatibility table.

      • RS2

        public static final RowLock RS2

      • RS3

        public static final RowLock RS3

      • RU2

        public static final RowLock RU2

      • RU3

        public static final RowLock RU3

      • RIP

        public static final RowLock RIP

      • RI

        public static final RowLock RI

      • RX2

        public static final RowLock RX2

      • RX3

        public static final RowLock RX3

      • DIAG_CONTAINERID

        public static final java.lang.String DIAG_CONTAINERID
        See Also:
        Constant Field Values

    • Constructor Detail

      • RowLock

        private RowLock​(int type)

    • Method Detail

      • getType

        public int getType()
        Get an integer representation of the type of the lock. This method is guaranteed to return an integer >= 0 and < R_NUMBER. No correlation between the value and one of the static variables (CIS etc.) is guaranteed, except that the values returned do not change.

      • isCompatible

        public boolean isCompatible​(RowLock granted)

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object