gnu.prolog.term
Class ChangeableTerm

java.lang.Object
  gnu.prolog.term.Term
      gnu.prolog.term.VariableTerm
          gnu.prolog.term.ChangeableTerm

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

DoubleQuotesTerm

public abstract class ChangeableTerm
extends VariableTerm

Terms for which the value varies depending on prolog flags extend this class. They pick which to use for value on creation and at dereference().

Author:

Daniel Thomas

See Also:

Serialized Form

Field Summary

protected Environment

environment The Environment we will use to get the flags from.

Fields inherited from class gnu.prolog.term.VariableTerm

name, value

Fields inherited from class gnu.prolog.term.Term

ATOM, COMPOUND, FLOAT, INTEGER, JAVA_OBJECT, UNKNOWN, VARIABLE

Constructor Summary

protected

ChangeableTerm(Environment env)

Method Summary

abstract Term	dereference() The value may also be altered by this method in child classes.
protected Term	getPrologFlag(AtomTerm term)

Methods inherited from class gnu.prolog.term.VariableTerm

clone, getTermType

Methods inherited from class gnu.prolog.term.Term

clone, toString

Methods inherited from class java.lang.Object

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

Field Detail

environment

protected Environment environment

The Environment we will use to get the flags from.

Constructor Detail

ChangeableTerm

protected ChangeableTerm(Environment env)

Method Detail

getPrologFlag

protected Term getPrologFlag(AtomTerm term)

dereference

public abstract Term dereference()

The value may also be altered by this method in child classes.

Overrides:

dereference in class VariableTerm

Returns:

dereferenced term