uk.ac.man.cs.rainbow.rapa.data
Class Number

java.lang.Object
  |
  +--uk.ac.man.cs.rainbow.rapa.data.Expression
        |
        +--uk.ac.man.cs.rainbow.rapa.data.Number

All Implemented Interfaces:

Argument, Comparable, Serializable, Value, VariableContainer

public class Number

extends Expression

implements Comparable

See Also:

Serialized Form

Constructor Summary

Number(int value)

Method Summary

Value	apply(Unifier u) Apply a unifier to this value to get a new value.
int	compareTo(Object o)
boolean	equals(Value e)
Type	getResultType()
int	getValue()
int	hashCode()
boolean	hasVariable()
boolean	occurs(Substitution s, Variable v) Check whether the variable occurs in this value under the given substitution.
Value	subst(Substitution s) Apply a substitution to this value to get a new value.
String	toString()
Substitution	unify(Substitution s, Value e) Get the substitution which unifies this value with the given value, after applying the given substitution.

Methods inherited from class uk.ac.man.cs.rainbow.rapa.data.Expression

compatableWith, equals, evaluate, getNodeType, subst

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Number

public Number(int value)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getValue

public int getValue()

apply

public Value apply(Unifier u)

Description copied from interface: Value

Apply a unifier to this value to get a new value.

Overrides:

apply in class Expression

occurs

public boolean occurs(Substitution s,
                      Variable v)

Description copied from interface: Value

Check whether the variable occurs in this value under the given substitution.

Overrides:

occurs in class Expression

unify

public Substitution unify(Substitution s,
                          Value e)
                   throws NotUnifiable

Description copied from interface: Value

Get the substitution which unifies this value with the given value, after applying the given substitution.

Overrides:

unify in class Expression

Following copied from interface: uk.ac.man.cs.rainbow.rapa.data.Value

Parameters:

subst - The substitution to apply first.

val - The value to unify with this value.

Returns:

The substitution that is the combination of the given substitution and whatever extra substitutions are necessary to unify the two values.

Throws:

NotUnifiable - If the two values cannot be unified.

hasVariable

public boolean hasVariable()

subst

public Value subst(Substitution s)

Description copied from interface: Value

Apply a substitution to this value to get a new value.

Overrides:

subst in class Expression

equals

public boolean equals(Value e)

Overrides:

equals in class Expression

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getResultType

public Type getResultType()

Overrides:

getResultType in class Expression

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable