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

public class UnionPattern
extends Pattern

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

See Also:
Serialized Form

Field Summary
protected  Pattern p1
           
protected  Pattern p2
           
 
Fields inherited from class net.sf.saxon.pattern.Pattern
originalText
 
Constructor Summary
UnionPattern(Pattern p1, Pattern p2)
          Constructor
 
Method Summary
 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, Controller controller)
          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()
          Simplify the pattern: perform any context-independent optimisations
 Pattern typeCheck(StaticContext env)
          Type-check the pattern.
 
Methods inherited from class net.sf.saxon.pattern.Pattern
getDefaultPriority, getFingerprint, getLineNumber, getSystemId, internalMatches, make, 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
XPathException

typeCheck

public Pattern typeCheck(StaticContext env)
                  throws XPathException
Type-check the pattern. This is only needed for patterns that contain variable references or function calls.

Overrides:
typeCheck in class Pattern
Returns:
the optimised Pattern
XPathException

setOriginalText

public void setOriginalText(java.lang.String pattern)
Set the original text

Overrides:
setOriginalText in class Pattern

matches

public boolean matches(NodeInfo e,
                       Controller controller)
                throws XPathException
Determine if the supplied node matches the pattern

Specified by:
matches in class Pattern
Parameters:
e - the node to be compared
controller - The controller. 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
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