plp.expressions2.memory
Class StackHandler

java.lang.Object
  plp.expressions2.memory.StackHandler

public class StackHandler
extends java.lang.Object

Author:

bldb, efas, jcbr, srmq This class performs some utility operations over a Stack

Method Summary

static java.lang.Object	getFromId(java.util.Stack stack, Id id) Looks for the object whose Id is 'id' on the mappings that exist on the specified Stack.
static void	mapIdObject(java.util.Stack stack, Id id, java.lang.Object object) Adds a mapping on the specified Stack

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getFromId

public static java.lang.Object getFromId(java.util.Stack stack,
                                         Id id)
                                  throws IdentificadorNaoDeclaradoException

Looks for the object whose Id is 'id' on the mappings that exist on the specified Stack.

Parameters:

stack, - the Stack which contains the mappings (Id->Object)

id, - the Id of the desired object.

Returns:

an Object indexed by the Id

Throws:

IdentificadorNaoDeclaradoException - if there is not any object indexed by 'id'

mapIdObject

public static void mapIdObject(java.util.Stack stack,
                               Id id,
                               java.lang.Object object)
                        throws IdentificadorJaDeclaradoException

Adds a mapping on the specified Stack

Parameters:

stack, - the Stack which contains the mappings

id, - the Id that will index the new object

object, - the content that will be indexed

Throws:

VariavelJaDeclaradaException, - if 'id' is already used in an existing mapping

IdentificadorJaDeclaradoException