net.sf.saxon.pattern
Class SubstitutionGroupTest

java.lang.Object
  extended by net.sf.saxon.pattern.NodeTest
      extended by net.sf.saxon.pattern.SubstitutionGroupTest
All Implemented Interfaces:
Serializable, ItemType

public class SubstitutionGroupTest
extends NodeTest

NodeTest is an interface that enables a test of whether a node has a particular name and type. A SubstitutionGroupTest matches element nodes whose name is one of a given set of names: it is used for KindTests of the form schema-element(N) where all elements in a substitution group are to be matched.

Author:
Michael H. Kay
See Also:
Serialized Form

Constructor Summary
SubstitutionGroupTest(int head, IntHashSet group)
          Constructor
 
Method Summary
 boolean equals(Object other)
           
 double getDefaultPriority()
          Determine the default priority of this node test when used on its own as a Pattern
 int getHeadFingerprint()
          Get the fingerprint of the head of the substitution group
 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.
 IntHashSet getRequiredNodeNames()
          Get the set of node names allowed by this NodeTest.
 int hashCode()
          Returns a hash code value for the object.
 boolean matches(int nodeKind, int nameCode, 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(TinyTree tree, int nodeNr)
          Test whether this node test is satisfied by a given node on a TinyTree.
 String toString(NamePool pool)
          Display the type descriptor for diagnostics
 
Methods inherited from class net.sf.saxon.pattern.NodeTest
getAtomizedItemType, getContentType, getFingerprint, getPrimitiveItemType, getSuperType, isAtomicType, isNillable, matchesItem
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SubstitutionGroupTest

public SubstitutionGroupTest(int head,
                             IntHashSet group)
Constructor

Parameters:
head - The name of the head element of the substitution group
group - An IntSet containing Integer values representing the fingerprints of element names included in the substitution group
Method Detail

matches

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

Specified by:
matches in class NodeTest
Parameters:
nodeKind - The type of node to be matched
nameCode - identifies the expanded name of the node to be matched
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

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

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

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

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.

Overrides:
getRequiredNodeNames in class NodeTest

getHeadFingerprint

public int getHeadFingerprint()
Get the fingerprint of the head of the substitution group

Returns:
the fingerprint of the head of the substitution group

toString

public String toString(NamePool pool)
Description copied from class: NodeTest
Display the type descriptor for diagnostics

Specified by:
toString in interface ItemType
Overrides:
toString in class NodeTest

hashCode

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

Overrides:
hashCode in class Object

equals

public boolean equals(Object other)
Overrides:
equals in class Object


Copyright (C) Michael H. Kay. All rights reserved.