net.sf.saxon.pattern
Class NamespaceTest

java.lang.Object
  net.sf.saxon.pattern.NodeTest
      net.sf.saxon.pattern.NamespaceTest

All Implemented Interfaces:

Serializable, QNameTest, ItemType

public final class NamespaceTest
extends NodeTest
implements QNameTest

NodeTest is an interface that enables a test of whether a node has a particular name and type. A NamespaceTest matches the node type and the namespace URI.

Author:

Michael H. Kay

See Also:

Serialized Form

Constructor Summary

NamespaceTest(NamePool pool, int nodeKind, String uri)

Method Summary

boolean	equals(Object other) Indicates whether some other object is "equal to" this one.
double	getDefaultPriority() Determine the default priority of this node test when used on its own as a Pattern
String	getNamespaceURI() Get the namespace URI matched by this NamespaceTest
int	getNodeKindMask() Get a mask indicating which kinds of nodes this NodeTest can match.
int	getPrimitiveType() Determine the types of nodes to which this pattern applies.
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.
String	toString()

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

NamespaceTest

public NamespaceTest(NamePool pool,
                     int nodeKind,
                     String uri)

Method Detail

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

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

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

getPrimitiveType

public int getPrimitiveType()

Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Type.NODE

Specified by:

getPrimitiveType in interface ItemType

Overrides:

getPrimitiveType in class NodeTest

Returns:

the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT

getSuperType

public ItemType getSuperType(TypeHierarchy th)

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()

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<

getNamespaceURI

public String getNamespaceURI()

Get the namespace URI matched by this NamespaceTest

Returns:

the namespace URI matched by this NamespaceTest

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

equals

public boolean equals(Object other)

Indicates whether some other object is "equal to" this one.

Overrides:

equals in class Object