net.sf.saxon.pattern

Class AnyNodeTest

java.lang.Object

net.sf.saxon.pattern.NodeTest

net.sf.saxon.pattern.AnyNodeTest

All Implemented Interfaces:

Serializable, QNameTest, ItemType

public final class AnyNodeTest
extends NodeTest
implements QNameTest

NodeTest is an interface that enables a test of whether a node has a particular name and type. An AnyNodeTest matches any node.

Author:

Michael H. Kay

See Also:

Serialized Form

Method Summary

Methods

Modifier and Type	Method and Description
double	getDefaultPriority() Determine the default priority of this node test when used on its own as a Pattern
static AnyNodeTest	getInstance() Get an instance of AnyNodeTest
int	getNodeKindMask() Get a mask indicating which kinds of nodes this NodeTest can match.
ItemType	getSuperType(TypeHierarchy th) Get the type from which this item type is derived by restriction.
int	hashCode() Returns a hash code value for the object.
boolean	matches(int nodeKind, NodeName name, int annotation) Test whether this node test is satisfied by a given node.
boolean	matches(NodeInfo node) Test whether this node test is satisfied by a given node.
boolean	matches(StructuredQName qname) Test whether this QNameTest matches a given QName
boolean	matches(TinyTree tree, int nodeNr) Test whether this node test is satisfied by a given node on a TinyTree.
boolean	matchesItem(Item item, boolean allowURIPromotion, Configuration config) Test whether a given item conforms to this type
String	toString()

Methods inherited from class net.sf.saxon.pattern.NodeTest

getAtomizedItemType, getContentType, getFingerprint, getPrimitiveItemType, getPrimitiveType, getRequiredNodeNames, isAtomicType, isAtomizable, isNillable, isPlainType, matches, visitNamedSchemaComponents

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static AnyNodeTest getInstance()

Get an instance of AnyNodeTest

matchesItem

public boolean matchesItem(Item item,
                  boolean allowURIPromotion,
                  Configuration config)

Test whether a given item conforms to this type

Specified by:

matchesItem in interface ItemType

Overrides:

matchesItem in class NodeTest

Parameters:

item - The item to be tested

allowURIPromotion -

config -

Returns:

true if the item is an instance of this type; false otherwise

getSuperType

public ItemType getSuperType(TypeHierarchy th)

Description copied from class: NodeTest

Get the type from which this item type is derived by restriction. This is the supertype in the XPath type heirarchy, as distinct from the Schema base type: this means that the supertype of xs:boolean is xs:anyAtomicType, whose supertype is item() (rather than xs:anySimpleType).

In fact the concept of "supertype" is not really well-defined, because the types form a lattice rather than a hierarchy. The only real requirement on this function is that it returns a type that strictly subsumes this type, ideally as narrowly as possible.

Specified by:

getSuperType in interface ItemType

Overrides:

getSuperType in class NodeTest

Parameters:

th - the type hierarchy cache

Returns:

the supertype, or null if this type is item()

matches

public boolean matches(int nodeKind,
              NodeName name,
              int annotation)

Test whether this node test is satisfied by a given node. This method is only fully supported for a subset of NodeTests, because it doesn't provide all the information needed to evaluate all node tests. In particular (a) it can't be used to evaluate a node test of the form element(N,T) or schema-element(E) where it is necessary to know whether the node is nilled, and (b) it can't be used to evaluate a node test of the form document-node(element(X)). This in practice means that it is used (a) to evaluate the simple node tests found in the XPath 1.0 subset used in XML Schema, and (b) to evaluate node tests where the node kind is known to be an attribute.

Specified by:

matches in class NodeTest

Parameters:

nodeKind - The kind of node to be matched

name - identifies the expanded name of the node to be matched. The value should be null for a node with no name.

annotation - The actual content type of the node

Returns:

true if the node matches this node tst

matches

public boolean matches(TinyTree tree,
              int nodeNr)

Test whether this node test is satisfied by a given node on a TinyTree. The node must be a document, element, text, comment, or processing instruction node. This method is provided so that when navigating a TinyTree a node can be rejected without actually instantiating a NodeInfo object.

Overrides:

matches in class NodeTest

Parameters:

tree - the TinyTree containing the node

nodeNr - the number of the node within the TinyTree

Returns:

true if the node matches the NodeTest, otherwise false

matches

public boolean matches(NodeInfo node)

Test whether this node test is satisfied by a given node. This alternative method is used in the case of nodes where calculating the fingerprint is expensive, for example DOM or JDOM nodes.

Overrides:

matches in class NodeTest

Parameters:

node - the node to be matched

Returns:

true if the node test is satisfied by the supplied node, false otherwise

matches

public boolean matches(StructuredQName qname)

Test whether this QNameTest matches a given QName

Specified by:

matches in interface QNameTest

Parameters:

qname - the QName to be matched

Returns:

true if the name matches, false if not

getDefaultPriority

public final double getDefaultPriority()

Determine the default priority of this node test when used on its own as a Pattern

Specified by:

getDefaultPriority in interface ItemType

Returns:

the default priority

getNodeKindMask

public int getNodeKindMask()

Get a mask indicating which kinds of nodes this NodeTest can match. This is a combination of bits: 1<

Overrides:

getNodeKindMask in class NodeTest

Returns:

a combination of bits: 1<

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class Object