org.hecl
Class HashThing

java.lang.Object
  org.hecl.HashThing

All Implemented Interfaces:

RealThing

public class HashThing
extends java.lang.Object
implements RealThing

The HashThing class represents a hash table type in Hecl.

Version:

1.0

Author:

David N. Welton

HashThing

public HashThing()

Creates a new, empty HashThing instance.

HashThing

public HashThing(java.util.Hashtable h)

Creates a new HashThing instance from a Hashtable.

Parameters:

h - a Hashtable value

HashThing

public HashThing(java.util.Vector v)
          throws HeclException

Creates a new HashThing instance from a Vector. This may throw an exception, because if the Vector doesn't have an even number of elements, it won't be a valid hash table.

Parameters:

v - a Vector value

Throws:

HeclException - if an error occurs

thingclass

public java.lang.String thingclass()

Specified by:

thingclass in interface RealThing

create

public static Thing create(java.util.Hashtable h)

create allocates and returns a new HashThing typed Thing.

Parameters:

h - a Hashtable value

Returns:

a Thing value

get

public static java.util.Hashtable get(Thing thing)
                               throws HeclException

get attempts to return a Hashtable from a given Thing, in the process transforming that Thing into a HashThing internally.

Parameters:

thing - a Thing value

Returns:

a Hashtable value

Throws:

HeclException - if an error occurs

deepcopy

public RealThing deepcopy()
                   throws HeclException

deepcopy copies the hash table and all its elements.

Specified by:

deepcopy in interface RealThing

Returns:

a RealThing value

Throws:

HeclException

getStringRep

public java.lang.String getStringRep()

getStringRep returns a string representation of a HashThing, which is in reality a string representation of a ListThing, only that there are guaranteed to be an even number of elements.

Specified by:

getStringRep in interface RealThing

Returns:

a String value

Throws:

HeclException - if an error occurs