org.eclipse.viatra.query.runtime.rete.network.indexer

## Interface MessageIndexer

- All Superinterfaces:
    Clearable
  All Known Implementing Classes:
    DefaultMessageIndexer, GroupBasedMessageIndexer

      public interface MessageIndexer
      extends Clearable

  A message indexer is used by `Mailbox`es to index their contents.
  Since:
    2.0

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `delete(Tuple update)`
    `int` | `getCount(Tuple update)`
    `void` | `insert(Tuple update)`
    `boolean` | `isEmpty()`
    `void` | `update(Tuple update, int delta)`

    - ### Methods inherited from interface org.eclipse.viatra.query.runtime.matchers.util.Clearable

      `clear`

- - ### Method Detail

    - #### insert

          void insert(Tuple update)

    - #### delete

          void delete(Tuple update)

    - #### update

          void update(Tuple update,
                      int delta)

    - #### isEmpty

          boolean isEmpty()

    - #### getCount

          int getCount(Tuple update)