net.sf.saxon.pattern

Class NodeKindTest

java.lang.Object

net.sf.saxon.pattern.NodeTest

net.sf.saxon.pattern.NodeKindTest

All Implemented Interfaces:

ItemType

public class NodeKindTest
extends NodeTest

NodeTest is an interface that enables a test of whether a node has a particular name and kind. A NodeKindTest matches the node kind only.

Author:

Michael H. Kay

Field Summary

Fields

Modifier and Type	Field and Description
static NodeKindTest	ATTRIBUTE
static NodeKindTest	COMMENT
static NodeKindTest	DOCUMENT
static NodeKindTest	ELEMENT
static NodeKindTest	NAMESPACE
static NodeKindTest	PROCESSING_INSTRUCTION
static NodeKindTest	TEXT

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object other) Indicates whether some other object is "equal to" this one.
AtomicType	getAtomizedItemType() Get the content type allowed by this NodeTest (that is, the type annotation).
SchemaType	getContentType() Get the content type allowed by this NodeTest (that is, the type of content allowed).
double	getDefaultPriority() Determine the default priority of this node test when used on its own as a Pattern
int	getNodeKind() Get the node kind matched by this test
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.
UType	getUType() Get the corresponding UType.
int	hashCode() Returns a hash code value for the object.
static NodeTest	makeNodeKindTest(int kind) Make a test for a given kind of node
boolean	matches(int nodeKind, NodeName name, SchemaType annotation) Test whether this node test is satisfied by a given node.
boolean	matches(Item item, TypeHierarchy th) Test whether a given item conforms to this type
boolean	matches(TinyTree tree, int nodeNr) Test whether this node test is satisfied by a given node on a TinyTree.
boolean	matchesNode(NodeInfo node) Test whether this node test is satisfied by a given node.
static String	nodeKindName(int kind) Get the name of a node kind
String	toString()
static String	toString(int kind)

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

copy, export, getFingerprint, getMatchingNodeName, getPrimitiveItemType, getRequiredNodeNames, isAtomicType, isAtomizable, isNillable, isPlainType, visitNamedSchemaComponents

Methods inherited from class java.lang.Object

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

Field Detail

DOCUMENT

public static final NodeKindTest DOCUMENT

ELEMENT

public static final NodeKindTest ELEMENT

ATTRIBUTE

public static final NodeKindTest ATTRIBUTE

TEXT

public static final NodeKindTest TEXT

COMMENT

public static final NodeKindTest COMMENT

PROCESSING_INSTRUCTION

public static final NodeKindTest PROCESSING_INSTRUCTION

NAMESPACE

public static final NodeKindTest NAMESPACE

Method Detail

getNodeKind

public int getNodeKind()

Get the node kind matched by this test

Returns:

the matching node kind

getUType

public UType getUType()

Get the corresponding UType. A UType is a union of primitive item types.

Returns:

the smallest UType that subsumes this item type

makeNodeKindTest

public static NodeTest makeNodeKindTest(int kind)

Make a test for a given kind of node

matches

public boolean matches(Item item,
              TypeHierarchy th)

Description copied from interface: ItemType

Test whether a given item conforms to this type

Specified by:

matches in interface ItemType

Overrides:

matches in class NodeTest

Parameters:

item - The item to be tested

th - The type hierarchy cache. Currently used only when matching function items.

Returns:

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

matches

public boolean matches(int nodeKind,
              NodeName name,
              SchemaType 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 test

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

matchesNode

public boolean matchesNode(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:

matchesNode in class NodeTest

Parameters:

node - the node to be matched

Returns:

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

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 class NodeTest

Returns:

the default priority for the pattern

getPrimitiveType

public int getPrimitiveType()

Determine the types of nodes to which this pattern applies. Used for optimisation.

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

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<

getContentType

public SchemaType getContentType()

Get the content type allowed by this NodeTest (that is, the type of content allowed). Return AnyType if there are no restrictions.

Overrides:

getContentType in class NodeTest

Returns:

the type annotation that all nodes matching this NodeTest must satisfy

getAtomizedItemType

public AtomicType getAtomizedItemType()

Get the content type allowed by this NodeTest (that is, the type annotation). Return AnyType if there are no restrictions. The default implementation returns AnyType.

Specified by:

getAtomizedItemType in interface ItemType

Overrides:

getAtomizedItemType in class NodeTest

Returns:

the best available item type of the atomic values that will be produced when an item of this type is atomized, or null if it is known that atomization will throw an error.

toString

public String toString()

Overrides:

toString in class Object

toString

public static String toString(int kind)

nodeKindName

public static String nodeKindName(int kind)

Get the name of a node kind

Parameters:

kind - the node kind, for example Type.ELEMENT or Type.ATTRIBUTE

Returns:

the name of the node kind, for example "element" or "attribute"

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