siena
Class AttributeConstraint

java.lang.Object
  siena.AttributeConstraint

public class AttributeConstraint
extends java.lang.Object

an elementary predicate over an attribute in an event notification. AttributeConstraints are the basic elements of a Filter.

An AttributeConstraint is defined by an operator and a value, and it is associated with an attribute name. Applying an AttributeConstraint with operator op and value v to an attribute value x means computing x op v.

The operators provided by AttributeConstraint are defined in Op. They are equal, not-equal, less-than, less-or-equal, greater-than,greater-or-equal, has-substring, has-prefix, has-suffix, and any.

See Also:

Op, Filter

Field Summary

short	op the comparison operator valid values are defined in Op
AttributeValue	value the comparison value

Constructor Summary

AttributeConstraint(AttributeConstraint c)
creates a (deep) copy of an attribute constraint

AttributeConstraint(AttributeValue v)
create an equality constraint with the given value

AttributeConstraint(short o, AttributeValue x)
create a constraint with the given value

AttributeConstraint(short o, boolean b)
create a constraint with the given boolean value

AttributeConstraint(short o, byte[] s)
create a constraint with the given byte[] value

AttributeConstraint(short o, double d)
create a constraint with the given long value

AttributeConstraint(short o, int i)
create a constraint with the given int value

AttributeConstraint(short o, long i)
create a constraint with the given long value

AttributeConstraint(short o, java.lang.String s)
create a constraint with the given string value

Method Summary

int	hashCode()
boolean	isEqualTo(AttributeConstraint x)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

value

public AttributeValue value

the comparison value

op

public short op

the comparison operator valid values are defined in Op

Constructor Detail

AttributeConstraint

public AttributeConstraint(AttributeConstraint c)

creates a (deep) copy of an attribute constraint

AttributeConstraint

public AttributeConstraint(AttributeValue v)

create an equality constraint with the given value

AttributeConstraint

public AttributeConstraint(short o,
                           java.lang.String s)

create a constraint with the given string value

AttributeConstraint

public AttributeConstraint(short o,
                           byte[] s)

create a constraint with the given byte[] value

AttributeConstraint

public AttributeConstraint(short o,
                           int i)

create a constraint with the given int value

AttributeConstraint

public AttributeConstraint(short o,
                           long i)

create a constraint with the given long value

AttributeConstraint

public AttributeConstraint(short o,
                           double d)

create a constraint with the given long value

AttributeConstraint

public AttributeConstraint(short o,
                           boolean b)

create a constraint with the given boolean value

AttributeConstraint

public AttributeConstraint(short o,
                           AttributeValue x)

create a constraint with the given value

Method Detail

isEqualTo

public boolean isEqualTo(AttributeConstraint x)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object