jess
Class BindingValue

java.lang.Object
  |
  +--jess.Value
        |
        +--jess.BindingValue

All Implemented Interfaces:

java.io.Serializable

public class BindingValue

extends Value

implements java.io.Serializable

A class to represent a location within a rule LHS, used internally. It is 'self-resolving' using Context

(C) 1998 E.J. Friedman-Hill and the Sandia Corporation

Author:

Ernest J. Friedman-Hill

See Also:

Serialized Form

Method Summary

java.lang.String	atomValue(Context c) Returns the contents of this value, as an atom
boolean	equals(Value o) Compare this value to another value.
java.lang.Object	externalAddressValue(Context c) Returns the contents of this value, as an external adress object
Fact	factValue(Context c) Returns the contents of this value, as a fact
double	floatValue(Context c) Returns the contents of this value, as a number
int	getFactNumber()
java.lang.String	getName()
int	getSlotIndex()
int	getSubIndex()
int	getType()
int	hashCode() Return a hashcode for the object
int	intValue(Context c) Returns the contents of this value, as an int
ValueVector	listValue(Context c) Returns the contents of this value, as a list
double	numericValue(Context c) Returns the contents of this value, as a number
void	resetFactNumber()
Value	resolveValue(Context c) Given an evaluation context, return the "true value" of this Value.
java.lang.String	stringValue(Context c) Returns the contents of this value, as a String
java.lang.String	toString() Pretty-print this value, without adding parens to any lists
java.lang.String	variableValue(Context c) Returns the contents of this value, as a String (a variable name)

Methods inherited from class jess.Value

equals, equalsStar, funcallValue, longValue, toStringWithParens, type

Methods inherited from class java.lang.Object

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

Method Detail

resetFactNumber

public void resetFactNumber()

getName

public java.lang.String getName()

getFactNumber

public int getFactNumber()

getSlotIndex

public int getSlotIndex()

getSubIndex

public int getSubIndex()

getType

public int getType()

resolveValue

public Value resolveValue(Context c)
                   throws JessException

Description copied from class: Value

Given an evaluation context, return the "true value" of this Value. For this class, the true value is always "this". For subclasses, the Context may be used to compute a new Value.

Overrides:

resolveValue in class Value

Following copied from class: jess.Value

Parameters:

c - An execution context. You can pass null if you are sure that you're not calling this method on a subclass that uses the argument.

Returns:

This object

See Also:

Variable, Funcall

externalAddressValue

public final java.lang.Object externalAddressValue(Context c)
                                            throws JessException

Description copied from class: Value

Returns the contents of this value, as an external adress object

Overrides:

externalAddressValue in class Value

Following copied from class: jess.Value

Returns:

The external address object

Throws:

JessException - If this value does not contain an object

factValue

public final Fact factValue(Context c)
                     throws JessException

Description copied from class: Value

Returns the contents of this value, as a fact

Overrides:

factValue in class Value

Following copied from class: jess.Value

Returns:

The fact

Throws:

JessException - If this value does not contain a fact

listValue

public final ValueVector listValue(Context c)
                            throws JessException

Description copied from class: Value

Returns the contents of this value, as a list

Overrides:

listValue in class Value

Following copied from class: jess.Value

Returns:

The list

Throws:

JessException - If this value does not contain a list

intValue

public final int intValue(Context c)
                   throws JessException

Description copied from class: Value

Returns the contents of this value, as an int

Overrides:

intValue in class Value

Following copied from class: jess.Value

Returns:

The number as an int

Throws:

JessException - If this value does not contain any kind of number

floatValue

public final double floatValue(Context c)
                        throws JessException

Description copied from class: Value

Returns the contents of this value, as a number

Overrides:

floatValue in class Value

Following copied from class: jess.Value

Returns:

The number as a double

Throws:

JessException - If this value does not contain any kind of number

numericValue

public final double numericValue(Context c)
                          throws JessException

Description copied from class: Value

Returns the contents of this value, as a number

Overrides:

numericValue in class Value

Following copied from class: jess.Value

Returns:

The number as a double

Throws:

JessException - If this value does not contain any kind of number

atomValue

public final java.lang.String atomValue(Context c)
                                 throws JessException

Description copied from class: Value

Returns the contents of this value, as an atom

Overrides:

atomValue in class Value

Following copied from class: jess.Value

Returns:

The atom

Throws:

JessException - If this value does not contain any kind of String

variableValue

public final java.lang.String variableValue(Context c)
                                     throws JessException

Description copied from class: Value

Returns the contents of this value, as a String (a variable name)

Overrides:

variableValue in class Value

Following copied from class: jess.Value

Returns:

The name of the variable

Throws:

JessException - If this value does not contain a variable

stringValue

public final java.lang.String stringValue(Context c)
                                   throws JessException

Description copied from class: Value

Returns the contents of this value, as a String

Overrides:

stringValue in class Value

Following copied from class: jess.Value

Returns:

The string

Throws:

JessException - If this value does not contain any kind of String

toString

public java.lang.String toString()

Description copied from class: Value

Pretty-print this value, without adding parens to any lists

Overrides:

toString in class Value

Following copied from class: jess.Value

Returns:

The formatted string

hashCode

public int hashCode()

Description copied from class: Value

Return a hashcode for the object

Overrides:

hashCode in class Value

Following copied from class: jess.Value

Returns:

The hashcode

equals

public boolean equals(Value o)

Description copied from class: Value

Compare this value to another value. Believe it or not, using this separate overloaded routine has a measurable impact on performance - since so much time is spent comparing Values.

Overrides:

equals in class Value

Following copied from class: jess.Value

Parameters:

v - The Value to compare to.

Returns:

True if the Values are equivalent.