tarau.jinni
Class BlackBoard

java.lang.Object
  |
  +--java.util.Dictionary
        |
        +--java.util.Hashtable
              |
              +--tarau.jinni.HashDict
                    |
                    +--tarau.jinni.BlackBoard

Direct Known Subclasses:

DataBase

public class BlackBoard

extends HashDict

This class implementes generic multiple tuples by key operations for use by the PrologBlackBoard class implementing Linda operations on Prolog terms. It uses the Queue class for keeping elemetns of type Term sharing the same key.

See Also:

PrologBlackBoard, Queue, Term, Serialized Form

Fields inherited from class java.util.Hashtable

count, ENTRIES, entrySet, KEYS, keySet, loadFactor, modCount, serialVersionUID, table, threshold, values, VALUES

Constructor Summary

BlackBoard()
creates a new BlackBoard

Method Summary

protected void	add(java.lang.String k, Term value) Adds a Term or Clause to the the blackboard, to be used by Linda out/1 operation
private void	addBack(java.lang.String k, java.util.Vector V)
private Term	pick(java.lang.String k) Removes the first Term having key k or the first enumerated key if k is null
protected Term	take(java.lang.String k, Term pattern) Removes the first matching Term or Clause from the blackboard, to be used by Linda in/1 operation in PrologBlackBoard
java.util.Enumeration	toEnumeration()
java.util.Enumeration	toEnumerationFor(java.lang.String k) This gives an enumeration view for the sequence of objects kept under key k.

Methods inherited from class tarau.jinni.HashDict

name, stat

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, put, putAll, readObject, rehash, remove, size, toString, values, writeObject

Methods inherited from class java.lang.Object

, finalize, getClass, notify, notifyAll, registerNatives, wait, wait, wait

Constructor Detail

BlackBoard

public BlackBoard()

creates a new BlackBoard

See Also:

Term

Method Detail

pick

private final Term pick(java.lang.String k)

Removes the first Term having key k or the first enumerated key if k is null

addBack

private final void addBack(java.lang.String k,
                           java.util.Vector V)

take

protected final Term take(java.lang.String k,
                          Term pattern)

Removes the first matching Term or Clause from the blackboard, to be used by Linda in/1 operation in PrologBlackBoard

See Also:

PrologBlackBoard#in()

add

protected final void add(java.lang.String k,
                         Term value)

Adds a Term or Clause to the the blackboard, to be used by Linda out/1 operation

See Also:

PrologBlackBoard

toEnumerationFor

public java.util.Enumeration toEnumerationFor(java.lang.String k)

This gives an enumeration view for the sequence of objects kept under key k.

toEnumeration

public java.util.Enumeration toEnumeration()