net.sf.saxon.pattern

Class UnionPattern

java.lang.Object

net.sf.saxon.pattern.Pattern

net.sf.saxon.pattern.UnionPattern

All Implemented Interfaces:

java.io.Serializable, javax.xml.transform.SourceLocator, Container

public class UnionPattern
extends Pattern

A pattern formed as the union (or) of two other patterns

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Pattern	p1
protected Pattern	p2

Constructor Summary

Constructors

Constructor and Description
UnionPattern(Pattern p1, Pattern p2) Constructor

Method Summary

Modifier and Type	Method and Description
Pattern	analyze(StaticContext env, ItemType contextItemType) Type-check the pattern.
Pattern	getLHS() Get the LHS of the union
int	getNodeKind() Determine the types of nodes to which this pattern applies.
NodeTest	getNodeTest() Get a NodeTest that all the nodes matching this pattern must satisfy
Pattern	getRHS() Get the RHS of the union
boolean	matches(NodeInfo e, XPathContext context) Determine if the supplied node matches the pattern
void	setLineNumber(int lineNumber) Override method to set the system ID, so it's set on both halves
void	setOriginalText(java.lang.String pattern) Set the original text
void	setSystemId(java.lang.String systemId) Override method to set the system ID, so it's set on both halves
Pattern	simplify(StaticContext env) Simplify the pattern: perform any context-independent optimisations

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

getColumnNumber, getDefaultPriority, getDependencies, getExecutable, getFingerprint, getHostLanguage, getLineNumber, getLocationProvider, getPublicId, getSystemId, internalMatches, iterateSubExpressions, make, promote, replaceSubExpression, setExecutable, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

p1

protected Pattern p1

p2

protected Pattern p2

Constructor Detail

UnionPattern

public UnionPattern(Pattern p1,
                    Pattern p2)

Constructor

Parameters:

p1 - the left-hand operand

p2 - the right-hand operand

Method Detail

simplify

public Pattern simplify(StaticContext env)
                 throws XPathException

Simplify the pattern: perform any context-independent optimisations

Overrides:

simplify in class Pattern

Returns:

the optimised Pattern

Throws:

XPathException

analyze

public Pattern analyze(StaticContext env,
                       ItemType contextItemType)
                throws XPathException

Type-check the pattern. This is only needed for patterns that contain variable references or function calls.

Overrides:

analyze in class Pattern

Returns:

the optimised Pattern

Throws:

XPathException

setOriginalText

public void setOriginalText(java.lang.String pattern)

Set the original text

Overrides:

setOriginalText in class Pattern

matches

public boolean matches(NodeInfo e,
                       XPathContext context)
                throws XPathException

Determine if the supplied node matches the pattern

Specified by:

matches in class Pattern

Parameters:

e - the node to be compared

context - The dynamic context. Only relevant if the pattern uses variables, or contains calls on functions such as document() or key().

Returns:

true if the node matches either of the operand patterns

Throws:

XPathException

getNodeKind

public int getNodeKind()

Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Node.NODE

Overrides:

getNodeKind in class Pattern

Returns:

the type of node matched by this pattern. e.g. Node.ELEMENT or Node.TEXT

getNodeTest

public NodeTest getNodeTest()

Get a NodeTest that all the nodes matching this pattern must satisfy

Specified by:

getNodeTest in class Pattern

getLHS

public Pattern getLHS()

Get the LHS of the union

getRHS

public Pattern getRHS()

Get the RHS of the union

setSystemId

public void setSystemId(java.lang.String systemId)

Override method to set the system ID, so it's set on both halves

Overrides:

setSystemId in class Pattern

setLineNumber

public void setLineNumber(int lineNumber)

Override method to set the system ID, so it's set on both halves

Overrides:

setLineNumber in class Pattern