Class CombinedNodeTest

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

public class CombinedNodeTest extends NodeTest
A CombinedNodeTest combines two nodetests using one of the operators union (=or), intersect (=and), difference (= "and not"). This arises when optimizing a union (etc) of two path expressions using the same axis. A CombinedNodeTest is also used to support constructs such as element(N,T), which can be expressed as (element(N,*) AND element(*,T))
Author:
Michael H. Kay
See Also:
  • Constructor Details

    • CombinedNodeTest

      public CombinedNodeTest(NodeTest nt1, int operator, NodeTest nt2)
  • Method Details

    • setGlobalComponentTest

      public void setGlobalComponentTest(boolean global)
      Indicate whether this CombinedNodeTest actually represents a SequenceType of the form schema-element(X) or schema-attribute(X). This information is used only when reconstructing a string representation of the NodeTest for diagnostics.
    • matches

      public boolean matches(int nodeType, int fingerprint, int annotation)
      Test whether this node test is satisfied by a given node.
      Specified by:
      matches in class NodeTest
      Parameters:
      nodeType - The type of node to be matched
      fingerprint - 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.
      Specified by:
      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.
      Specified by:
      matches in class NodeTest
      Parameters:
      node - the node to be matched
    • 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
    • getSuperType

      public ItemType getSuperType(TypeHierarchy th)
      Get the supertype of this type. This isn't actually a well-defined concept: the types form a lattice rather than a strict hierarchy.
      Specified by:
      getSuperType in interface ItemType
      Overrides:
      getSuperType in class NodeTest
      Parameters:
      th -
      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: 1invalid input: '<'invalid input: '<'Type.ELEMENT for element nodes, 1invalid input: '<'invalid input: '<'Type.TEXT for text nodes, and so on.
      Specified by:
      getNodeKindMask in class NodeTest
    • getPrimitiveType

      public int getPrimitiveType()
      Get the basic kind of object that this ItemType matches: for a NodeTest, this is the kind of node, or Type.Node if it matches different kinds of nodes.
      Specified by:
      getPrimitiveType in interface ItemType
      Overrides:
      getPrimitiveType in class NodeTest
      Returns:
      the node kind matched by this node test
    • 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
    • getContentType

      public SchemaType getContentType()
      Get the content type allowed by this NodeTest (that is, the type annotation of the matched nodes). Return AnyType if there are no restrictions. The default implementation returns AnyType.
      Overrides:
      getContentType in class NodeTest
    • getAtomizedItemType

      public AtomicType getAtomizedItemType()
      Get the item type of the atomic values that will be produced when an item of this type is atomized (assuming that atomization succeeds)
      Specified by:
      getAtomizedItemType in interface ItemType
      Overrides:
      getAtomizedItemType in class NodeTest
    • getFingerprint

      public int getFingerprint()
      Get the name of the nodes matched by this nodetest, if it matches a specific name. Return -1 if the node test matches nodes of more than one name
      Overrides:
      getFingerprint in class NodeTest
    • isNillable

      public boolean isNillable()
      Determine whether the content type (if present) is nillable
      Overrides:
      isNillable in class NodeTest
      Returns:
      true if the content test (when present) can match nodes that are nilled
    • 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
    • getDefaultPriority

      public double getDefaultPriority()
      get the default priority of this nodeTest when used as a pattern
      Specified by:
      getDefaultPriority in class NodeTest
    • getComponentNodeTests

      public NodeTest[] getComponentNodeTests()
      Get the two parts of the combined node test