jlibs.xml.sax.dog.path

Class Constraint

java.lang.Object

jlibs.xml.sax.dog.path.Constraint

Direct Known Subclasses:

Comment, Element, LocalName, NamespaceURI, Node, ParentNode, PI, PITarget, QName, Star, Text

public abstract class Constraint
extends Object

The root interface in expression hierarchy.

Author:

Santhosh Kumar T

Field Summary

Fields

Modifier and Type	Field and Description
int	id each constraint instance in a xmldog is assigned a unique id by XPathParser.
static int	ID_COMMENT used by Text
static int	ID_ELEMENT used by ParentNode
static int	ID_NODE There are few subclasses of Constraint which are sigletons.
static int	ID_PARENTNODE used by Node
static int	ID_PI used by Comment
static int	ID_STAR used by Element
static int	ID_START the ids of constraints which are non-singletons start from ID_START(inclusive)
static int	ID_TEXT used by Star

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Constraint(int id)

Method Summary

Modifier and Type	Method and Description
int	hashCode()
abstract boolean	matches(Event event)

Methods inherited from class java.lang.Object

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

Field Detail

ID_NODE

public static final int ID_NODE

There are few subclasses of Constraint which are sigletons. These subclasses always use same id across xmldog instances. The following constants are used for those subclasses respectively.

See Also:

Constant Field Values

ID_PARENTNODE

public static final int ID_PARENTNODE

used by Node

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Constant Field Values

ID_ELEMENT

public static final int ID_ELEMENT

used by ParentNode

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Constant Field Values

ID_STAR

public static final int ID_STAR

used by Element

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Constant Field Values

ID_TEXT

public static final int ID_TEXT

used by Star

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Constant Field Values

ID_COMMENT

public static final int ID_COMMENT

used by Text

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Constant Field Values

ID_PI

public static final int ID_PI

used by Comment

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Constant Field Values

ID_START

public static final int ID_START

the ids of constraints which are non-singletons start from ID_START(inclusive)

See Also:

Constant Field Values

id

public final int id

each constraint instance in a xmldog is assigned a unique id by XPathParser. this unique id is used as hascode for fast lookup.

Constructor Detail

Constraint

protected Constraint(int id)

Method Detail

matches

public abstract boolean matches(Event event)

hashCode

public final int hashCode()

Overrides:

hashCode in class Object