Package org.apache.qpid.server.filter

Class ConstantExpression<T>

java.lang.Object

org.apache.qpid.server.filter.ConstantExpression<T>

All Implemented Interfaces:

Expression<T>

public class ConstantExpression<T>
extends java.lang.Object
implements Expression<T>

Represents a constant expression

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression	FALSE
static org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression	NULL
static org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression	TRUE

Constructor Summary

Constructors

Constructor	Description
ConstantExpression(java.lang.Object value)

Method Summary

Modifier and Type	Method	Description
static <E> ConstantExpression<E>	createFloat(java.lang.String text)
static <E> ConstantExpression<E>	createFromDecimal(java.lang.String text)
static <E> ConstantExpression<E>	createFromHex(java.lang.String text)
static <E> ConstantExpression<E>	createFromOctal(java.lang.String text)
static java.lang.String	encodeString(java.lang.String s)	Encodes the value of string so that it looks like it would look like when it was provided in a selector.
boolean	equals(java.lang.Object o)	TODO: more efficient hashCode()
java.lang.Object	evaluate(T message)
static <E> ConstantExpression<E>	FALSE()
java.lang.Object	getValue()
int	hashCode()	TODO: more efficient hashCode()
static <E> ConstantExpression<E>	NULL()
java.lang.String	toString()
static <E> ConstantExpression<E>	TRUE()

Methods inherited from class java.lang.Object

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

Field Detail

NULL

public static final org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression NULL

TRUE

public static final org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression TRUE

FALSE

public static final org.apache.qpid.server.filter.ConstantExpression.BooleanConstantExpression FALSE

Constructor Detail

ConstantExpression

public ConstantExpression(java.lang.Object value)

Method Detail

NULL

public static <E> ConstantExpression<E> NULL()

TRUE

public static <E> ConstantExpression<E> TRUE()

FALSE

public static <E> ConstantExpression<E> FALSE()

createFromDecimal

public static <E> ConstantExpression<E> createFromDecimal(java.lang.String text)

createFromHex

public static <E> ConstantExpression<E> createFromHex(java.lang.String text)

createFromOctal

public static <E> ConstantExpression<E> createFromOctal(java.lang.String text)

createFloat

public static <E> ConstantExpression<E> createFloat(java.lang.String text)

evaluate

public java.lang.Object evaluate(T message)

Specified by:

evaluate in interface Expression<T>

Parameters:

message - object to evaluate

Returns:

the value of this expression

getValue

public java.lang.Object getValue()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()

hashCode

public int hashCode()

TODO: more efficient hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

equals

public boolean equals(java.lang.Object o)

TODO: more efficient hashCode()

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(java.lang.Object)

encodeString

public static java.lang.String encodeString(java.lang.String s)

Encodes the value of string so that it looks like it would look like when it was provided in a selector.

Parameters:

s - string to encode

Returns:

encoded string