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.

Constructor Summary

Constructors

Constructor and Description
HashThing() Creates a new, empty HashThing instance.
HashThing(java.util.Hashtable h) Creates a new HashThing instance from a Hashtable.
HashThing(java.util.Vector v) Creates a new HashThing instance from a Vector.

Method Summary

Modifier and Type	Method and Description
static Thing	create(java.util.Hashtable h) create allocates and returns a new HashThing typed Thing.
RealThing	deepcopy() deepcopy copies the hash table and all its elements.
static java.util.Hashtable	get(Thing thing) get attempts to return a Hashtable from a given Thing, in the process transforming that Thing into a HashThing internally.
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.
java.lang.String	thingclass()

Methods inherited from class java.lang.Object

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

Constructor Detail

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

Method Detail

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