com.icl.saxon.pattern
Class UnionPattern

java.lang.Object
  com.icl.saxon.pattern.Pattern
      com.icl.saxon.pattern.UnionPattern

public class UnionPattern

extends Pattern

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

Field Summary

protected Pattern	p1
protected Pattern	p2

Fields inherited from class com.icl.saxon.pattern.Pattern

originalText, staticContext

Constructor Summary

UnionPattern(Pattern p1, Pattern p2)
Constructor

Method Summary

Pattern	getLHS() Get the LHS of the union
short	getNodeType() Determine the types of nodes to which this pattern applies.
Pattern	getRHS() Get the RHS of the union
boolean	matches(NodeInfo e, Context c) Determine if the supplied node matches the pattern
void	setOriginalText(java.lang.String pattern) Set the original text
Pattern	simplify() Simplify the pattern: perform any context-independent optimisations

Methods inherited from class com.icl.saxon.pattern.Pattern

getDefaultPriority, getFingerprint, getLineNumber, getStaticContext, getSystemId, make, setStaticContext, 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()
                 throws XPathException

Simplify the pattern: perform any context-independent optimisations

Overrides:

simplify 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,
                       Context c)
                throws XPathException

Determine if the supplied node matches the pattern

Specified by:

matches in class Pattern

Parameters:

e - The NodeInfo representing the Element or other node to be tested against the Pattern

c - The context in which the match is to take place. Only relevant if the pattern uses variables.

Returns:

true if the node matches either of the operand patterns

Throws:

XPathException

getNodeType

public short getNodeType()

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:

getNodeType in class Pattern

Returns:

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

getLHS

public Pattern getLHS()

Get the LHS of the union

getRHS

public Pattern getRHS()

Get the RHS of the union