Package org.onemind.commons.java.datastructure

Class NametableStack

  • public class NametableStack
extends java.lang.Object
    A nametable stack contains key-value mapping that has a scope. A new scope can be opened for putting new mappings and all the mappings added in this scope can be wiped out easily with a closeScope command. In effect this is like a stack of Maps, hence the name NametableStack. NOTE: the implementation use a map and list to achieve the behaviour.
    Version:
    $Id: NametableStack.java,v 1.7 2005/06/22 22:57:37 thlee Exp $ $Name: $
    Author:
    TiongHiang Lee (thlee@onemindsoft.org)

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      private static class  NametableStack.LocalNametable
      The local nametable defines a scope where local variables mask out the global variables, but the global variable can still be accessed.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.util.ArrayList _list
      the list of maps *
      private static java.util.logging.Logger _logger
      the logger *
      private Nametable _nametable
      the map *

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object access​(java.lang.String name)
      Resolve the value associated with key name
      java.util.Map asMap()
      Return map representation of the nametable stack
      java.lang.Object assign​(java.lang.String name, java.lang.Object value)
      Assign name/value pair
      void closeLocalScope​(int i)  
      void closeScope​(int l)
      Close a scope
      boolean containsName​(java.lang.String name)
      Whether the map contains key name
      void declare​(java.lang.String name, java.lang.Object value)
      Declare name value pair
      int newLocalScope()  
      int newScope()
      Open a new scope for mappings.
      java.lang.String toString()

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • _logger

        private static final java.util.logging.Logger _logger
        the logger *

      • _nametable

        private Nametable _nametable
        the map *

      • _list

        private java.util.ArrayList _list
        the list of maps *

    • Constructor Detail

      • NametableStack

        public NametableStack()

      • NametableStack

        public NametableStack​(java.util.Map m)
        Parameters:
        m - the initial mapping

    • Method Detail

      • newScope

        public int newScope()
        Open a new scope for mappings. Return an integer that represents a scope id
        Returns:
        the new scope

      • newLocalScope

        public int newLocalScope()

      • closeLocalScope

        public void closeLocalScope​(int i)

      • closeScope

        public void closeScope​(int l)
        Close a scope
        Parameters:
        l - the scope id

      • declare

        public void declare​(java.lang.String name,
                    java.lang.Object value)
        Declare name value pair
        Parameters:
        name -
        value -

      • assign

        public java.lang.Object assign​(java.lang.String name,
                               java.lang.Object value)
        Assign name/value pair
        Parameters:
        name -
        value -
        Returns:

      • access

        public java.lang.Object access​(java.lang.String name)
        Resolve the value associated with key name
        Parameters:
        name - the key
        Returns:
        the value associated with key

      • containsName

        public boolean containsName​(java.lang.String name)
        Whether the map contains key name
        Parameters:
        name - the key
        Returns:
        true if map contains key name

      • asMap

        public java.util.Map asMap()
        Return map representation of the nametable stack
        Returns:
        the map

      • toString

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