jess
Class LongValue

java.lang.Object
  jess.Value
      jess.LongValue

All Implemented Interfaces:

java.io.Serializable

public class LongValue
extends Value
implements java.io.Serializable

A LongValue represents a Java long in Jess. You can do arithmetic and perform various other operations on LongValues. Use this subclass of Value when you want to create a Value that represents a Java long.

(C) 2006 Sandia National Laboratories

See Also:

Serialized Form

Constructor Summary

LongValue(long l)
Create a LongValue

Method Summary

boolean	equals(java.lang.Object v) Compare this value to another object.
boolean	equals(Value v) Compare this value to another value.
boolean	equalsStar(Value v) Like equals(Value), but returns true for 3 == 3.0
int	hashCode() Return a hashcode for the object.
int	intValue(Context c) Returns the contents of this value, as an int.
boolean	isLexeme(Context c) Indicate whether this object represents a lexeme.
boolean	isLiteral() Indicate whether this value represents a literal.
boolean	isNumeric(Context c) Indicate whether this object represents a number.
java.lang.Object	javaObjectValue(Context c) Returns the contents of this value, as a Java object.
long	longValue(Context c) Returns the contents of this value, as a long.
double	numericValue(Context c) Returns the contents of this value, as a number.
java.lang.String	stringValue(Context c) Returns the contents of this value, as a String.
java.lang.String	toString() Return a pretty-print version of this value, without adding parens to any lists.

Methods inherited from class jess.Value

atomValue, externalAddressValue, factValue, floatValue, funcallValue, functionValue, isVariable, listValue, resolveValue, symbolValue, toStringWithParens, type, variableValue

Methods inherited from class java.lang.Object

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

Constructor Detail

LongValue

public LongValue(long l)
          throws JessException

Create a LongValue

Parameters:

l - The long value

Throws:

JessException - If the type is invalid

Method Detail

longValue

public final long longValue(Context c)

Description copied from class: Value

Returns the contents of this value, as a long.

Overrides:

longValue in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

the number as a long

numericValue

public final double numericValue(Context c)

Description copied from class: Value

Returns the contents of this value, as a number.

Overrides:

numericValue in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

the number as a double

intValue

public final int intValue(Context c)

Description copied from class: Value

Returns the contents of this value, as an int.

Overrides:

intValue in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

the number as an int

javaObjectValue

public java.lang.Object javaObjectValue(Context c)
                                 throws JessException

Description copied from class: Value

Returns the contents of this value, as a Java object.

Overrides:

javaObjectValue in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

the Java object

Throws:

JessException - if this value does not contain a Java object

stringValue

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

Description copied from class: Value

Returns the contents of this value, as a String.

Overrides:

stringValue in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

the string

toString

public final java.lang.String toString()

Description copied from class: Value

Return a pretty-print version of this value, without adding parens to any lists.

Overrides:

toString in class Value

Returns:

the formatted string

equals

public final boolean equals(Value v)

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

Parameters:

v - the Value to compare to.

Returns:

true if the Values are equivalent.

equals

public final boolean equals(java.lang.Object v)

Description copied from class: Value

Compare this value to another object. As a convenience, if the parameter is not a Value, it will be compared to any contained Object inside this Value (a String or Java object.)

Overrides:

equals in class Value

Parameters:

v - the object to compare to.

Returns:

true if the objects are equivalent.

equalsStar

public final boolean equalsStar(Value v)

Description copied from class: Value

Like equals(Value), but returns true for 3 == 3.0

Overrides:

equalsStar in class Value

Parameters:

v - Value to compare to

Returns:

true if the values are loosely equivalent

hashCode

public int hashCode()

Description copied from class: Value

Return a hashcode for the object.

Overrides:

hashCode in class Value

Returns:

the hashcode

isNumeric

public boolean isNumeric(Context c)
                  throws JessException

Description copied from class: Value

Indicate whether this object represents a number. This includes FLOAT, INTEGER, LONG, and FACT values, as well as Strings and symbols that could be parsed as an INTEGER, LONG, or FLOAT.

Overrides:

isNumeric in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

true if this Value is a number.

Throws:

JessException - if something goes wrong during value resolution

isLexeme

public boolean isLexeme(Context c)
                 throws JessException

Description copied from class: Value

Indicate whether this object represents a lexeme. This includes Strings and symbols.

Overrides:

isLexeme in class Value

Parameters:

c - the execution context used to resolve the value

Returns:

true if this Value is a lexeme

Throws:

JessException - if something goes wrong during value resolution

isLiteral

public boolean isLiteral()

Description copied from class: Value

Indicate whether this value represents a literal. A literal has type STRING, SYMBOL, INTEGER, FLOAT, or LONG, and is not a variable.

Overrides:

isLiteral in class Value

Returns: