com.ugos.JIProlog.engine
Class JIPCons

java.lang.Object
  |
  +--com.ugos.JIProlog.engine.JIPTerm
        |
        +--com.ugos.JIProlog.engine.JIPCons

All Implemented Interfaces:

com.ugos.JIProlog.engine.Clearable, java.lang.Cloneable, java.io.Serializable

public class JIPCons

extends JIPTerm

JIPList wraps a prolog cons (a cons is composed by a set of terms separated by comma eventually enclosed in parenthesis: a,b,c or (a,b,c,).

Version:

2.0

Author:

Ugo Chirico 2002
Home Page: http://www.ugosweb.com/jiprolog

See Also:

JIPTerm, Serialized Form

Field Summary

static JIPCons

NIL Empty cons or nil

Method Summary

static JIPCons	append(JIPCons cons1, JIPCons cons2) Returns a new JIPCons object by appending cons2 to cons1
static JIPCons	create(JIPTerm head, JIPTerm tail) Creates a new cons object
JIPTerm	getHead() Returns the head of this JIPCons object
int	getHeight() Returns the number of elements in this cons object.
JIPTerm	getNth(int n) Returns the nth term in this cons.
JIPTerm	getTail() Returns the tail of this JIPCons object
boolean	isNIL() Returns true if this cons is nil.
JIPCons	reverse() Returns a new JIPCons object by reversing this JIPCons object

Methods inherited from class com.ugos.JIProlog.engine.JIPTerm

clear, clone, getVariables, getVariablesTable, toString, toString, toStringq, unifiable, unify

Methods inherited from class java.lang.Object

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

Field Detail

NIL

public static final JIPCons NIL

Empty cons or nil

Method Detail

create

public static final JIPCons create(JIPTerm head,
                                   JIPTerm tail)

Creates a new cons object

Parameters:

head - the head of the cons

tail - the tail the cons

Returns:

new JIPCons object

See Also:

JIPTerm

append

public static final JIPCons append(JIPCons cons1,
                                   JIPCons cons2)

Returns a new JIPCons object by appending cons2 to cons1

Parameters:

cons1 - first cons

cons2 - cons to append at the end of the first one.

Returns:

new JIPCons object by appending cons1 and cons2

reverse

public final JIPCons reverse()

Returns a new JIPCons object by reversing this JIPCons object

Returns:

new JIPCons object by reversing this JIPCons object

getHead

public final JIPTerm getHead()

Returns the head of this JIPCons object

Returns:

head of this JIPCons

See Also:

JIPTerm

getTail

public final JIPTerm getTail()

Returns the tail of this JIPCons object

Returns:

tail of this JIPCons object

See Also:

JIPTerm

getNth

public final JIPTerm getNth(int n)

Returns the nth term in this cons.
Raises ArrayIndexOutOfBound if the parameter is out of bound

Parameters:

n - index ot the term to extract

Returns:

the nth term in this cons.

See Also:

JIPTerm

isNIL

public final boolean isNIL()

Returns true if this cons is nil.

getHeight

public final int getHeight()

Returns the number of elements in this cons object.

Returns:

the number of elements in this cons object.