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 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(Object value)

Method Summary

Modifier and Type	Method	Description
static <E> ConstantExpression<E>	createFloat(String text)
static <E> ConstantExpression<E>	createFromDecimal(String text)
static <E> ConstantExpression<E>	createFromHex(String text)
static <E> ConstantExpression<E>	createFromOctal(String text)
static String	encodeString(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(Object o)	TODO: more efficient hashCode()
Object	evaluate(T message)
static <E> ConstantExpression<E>	FALSE()
Object	getValue()
int	hashCode()	TODO: more efficient hashCode()
static <E> ConstantExpression<E>	NULL()
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(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(String text)

createFromHex

public static <E> ConstantExpression<E> createFromHex(String text)

createFromOctal

public static <E> ConstantExpression<E> createFromOctal(String text)

createFloat

public static <E> ConstantExpression<E> createFloat(String text)

evaluate

public Object evaluate(T message)

Specified by:

evaluate in interface Expression<T>

Parameters:

message - object to evaluate

Returns:

the value of this expression

getValue

public Object getValue()

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()

hashCode

public int hashCode()

TODO: more efficient hashCode()

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

equals

public boolean equals(Object o)

TODO: more efficient hashCode()

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

encodeString

public static String encodeString(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