Package org.jheaps

Interface MergeableDoubleEndedAddressableHeap<K,​V>

  • Type Parameters:
    K - the type of keys maintained by this heap
    V - the type of values maintained by this heap
    All Superinterfaces:
    AddressableHeap<K,​V>, DoubleEndedAddressableHeap<K,​V>
    All Known Implementing Classes:
    ReflectedFibonacciHeap, ReflectedHeap, ReflectedPairingHeap
    public interface MergeableDoubleEndedAddressableHeap<K,​V>
extends DoubleEndedAddressableHeap<K,​V>
    A double-ended addressable heap that allows melding with another double-ended addressable heap.

    The second heap becomes empty and unusable after the meld operation, meaning than further insertions are not possible and will throw an IllegalStateException.

    A ClassCastException will be thrown if the two heaps are not of the same type. Moreover, the two heaps need to use the same comparators. If only one of them uses a custom comparator or both use custom comparators but are not the same by equals, an IllegalArgumentException is thrown.

    Note that all running time bounds on mergeable heaps are valid assuming that the user does not perform cascading melds on heaps such as: 

     d.meld(e);
 c.meld(d);
 b.meld(c);
 a.meld(b);
    The above scenario, although efficiently supported by using union-find with path compression, invalidates the claimed bounds.
    Author:
    Dimitrios Michail