Package net.sf.saxon.pattern
Class CombinedNodeTest
- java.lang.Object
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- net.sf.saxon.pattern.NodeTest
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- net.sf.saxon.pattern.CombinedNodeTest
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- All Implemented Interfaces:
java.io.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:
- Serialized Form
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Constructor Summary
Constructors Constructor Description CombinedNodeTest(NodeTest nt1, int operator, NodeTest nt2)
Create a NodeTest that combines two other node tests
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object other)
Indicates whether some other object is "equal to" this one.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)NodeTest[]
getComponentNodeTests()
Get the two parts of the combined node testSchemaType
getContentType()
Get the content type allowed by this NodeTest (that is, the type annotation of the matched nodes).double
getDefaultPriority()
get the default priority of this nodeTest when used as a patternint
getFingerprint()
Get the name of the nodes matched by this nodetest, if it matches a specific name.int
getNodeKindMask()
Get a mask indicating which kinds of nodes this NodeTest can match.int
getOperator()
Get the operator used to combine the two node tests: one ofToken.UNION
,Token.INTERSECT
,Token.EXCEPT
,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.IntHashSet
getRequiredNodeNames()
Get the set of node names allowed by this NodeTest.ItemType
getSuperType(TypeHierarchy th)
Get the supertype of this type.int
hashCode()
Returns a hash code value for the object.boolean
isNillable()
Determine whether the content type (if present) is nillableboolean
matches(int nodeType, int fingerprint, 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.void
setGlobalComponentTest(boolean global)
Indicate whether this CombinedNodeTest actually represents a SequenceType of the form schema-element(X) or schema-attribute(X).java.lang.String
toString()
java.lang.String
toString(NamePool pool)
Display the type descriptor for diagnostics-
Methods inherited from class net.sf.saxon.pattern.NodeTest
getPrimitiveItemType, isAtomicType, matchesItem
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Method Detail
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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.- Parameters:
global
- true if this test represents a schema-element or schema-attribute test
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matches
public boolean matches(int nodeType, int fingerprint, int annotation)
Test whether this node test is satisfied by a given node.
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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.
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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.
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toString
public java.lang.String toString(NamePool pool)
Description copied from class:NodeTest
Display the type descriptor for diagnostics
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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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 interfaceItemType
- Overrides:
getSuperType
in classNodeTest
- Parameters:
th
- the type hierarchy cache- Returns:
- the supertype, or null if this type is item()
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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 classNodeTest
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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 interfaceItemType
- Overrides:
getPrimitiveType
in classNodeTest
- Returns:
- the node kind matched by this node test
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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 classNodeTest
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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 classNodeTest
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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 interfaceItemType
- Overrides:
getAtomizedItemType
in classNodeTest
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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 classNodeTest
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isNillable
public boolean isNillable()
Determine whether the content type (if present) is nillable- Overrides:
isNillable
in classNodeTest
- Returns:
- true if the content test (when present) can match nodes that are nilled
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hashCode
public int hashCode()
Returns a hash code value for the object.- Overrides:
hashCode
in classjava.lang.Object
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equals
public boolean equals(java.lang.Object other)
Indicates whether some other object is "equal to" this one.- Overrides:
equals
in classjava.lang.Object
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getDefaultPriority
public double getDefaultPriority()
get the default priority of this nodeTest when used as a pattern- Specified by:
getDefaultPriority
in classNodeTest
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getComponentNodeTests
public NodeTest[] getComponentNodeTests()
Get the two parts of the combined node test- Returns:
- the two operands
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getOperator
public int getOperator()
Get the operator used to combine the two node tests: one ofToken.UNION
,Token.INTERSECT
,Token.EXCEPT
,- Returns:
- the operator
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