net.sf.saxon.pattern

Class NameTest

public class NameTest extends NodeTest

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

Author: Michael H. Kay

Constructor Summary
NameTest(int nodeType, int nameCode, NamePool namePool)
NameTest(NodeInfo node)
Create a NameTest for nodes of the same type and name as a given node
Method Summary
booleanequals(Object other)
Determines whether two NameTests are equal
doublegetDefaultPriority()
Determine the default priority of this node test when used on its own as a Pattern
intgetFingerprint()
Get the fingerprint required
intgetNodeKindMask()
Get a mask indicating which kinds of nodes this NodeTest can match.
intgetPrimitiveType()
Determine the types of nodes to which this pattern applies.
IntHashSetgetRequiredNodeNames()
Get the set of node names allowed by this NodeTest.
ItemTypegetSuperType(TypeHierarchy th)
Get the type from which this item type is derived by restriction.
inthashCode()
Returns a hash code value for the object.
booleanmatches(int nodeKind, int nameCode, int annotation)
Test whether this node test is satisfied by a given node
booleanmatches(TinyTree tree, int nodeNr)
Test whether this node test is satisfied by a given node on a TinyTree.
booleanmatches(NodeInfo node)
Test whether this node test is satisfied by a given node.
StringtoString()
StringtoString(NamePool pool)

Constructor Detail

NameTest

public NameTest(int nodeType, int nameCode, NamePool namePool)

NameTest

public NameTest(NodeInfo node)
Create a NameTest for nodes of the same type and name as a given node

Method Detail

equals

public boolean equals(Object other)
Determines whether two NameTests are equal

getDefaultPriority

public final double getDefaultPriority()
Determine the default priority of this node test when used on its own as a Pattern

getFingerprint

public int getFingerprint()
Get the fingerprint required

getNodeKindMask

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

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

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

getRequiredNodeNames

public IntHashSet getRequiredNodeNames()
Get the set of node names allowed by this NodeTest. This is returned as a set of Integer fingerprints. A null value indicates that all names are permitted (i.e. that there are no constraints on the node name. The default implementation returns null.

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 xdt: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.

Parameters: th

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

hashCode

public int hashCode()
Returns a hash code value for the object.

matches

public boolean matches(int nodeKind, int nameCode, int annotation)
Test whether this node test is satisfied by a given node

Parameters: nodeKind The type of node to be matched nameCode identifies the expanded name of the node to be matched

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.

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.

Parameters: node the node to be matched

toString

public String toString()

toString

public String toString(NamePool pool)