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
staticContext
 
Constructor Summary
UnionPattern(Pattern p1, Pattern p2)
          Constructor
 
Method Summary
 Pattern getLHS()
          Get the LHS of the union
 Pattern getRHS()
          Get the RHS of the union
 int getType()
          Determine the types of nodes to which this pattern applies.
 boolean isRelative()
          Determine if the pattern uses positional filters
 boolean matches(NodeInfo e, Context c)
          Determine if the supplied node matches the pattern
 Pattern simplify()
          Simplify the pattern: perform any context-independent optimisations
 java.lang.String toString()
          Get a string representation of the pattern
 
Methods inherited from class com.icl.saxon.pattern.Pattern
getDefaultPriority, getName, getNameTest, getStaticContext, make, make, setStaticContext
 
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 org.xml.sax.SAXException
Simplify the pattern: perform any context-independent optimisations
Overrides:
simplify in class Pattern
Following copied from class: com.icl.saxon.pattern.Pattern
Returns:
the optimised Pattern

matches

public boolean matches(NodeInfo e,
                       Context c)
                throws org.xml.sax.SAXException
Determine if the supplied node matches the pattern
Overrides:
matches in class Pattern
Returns:
true if the node matches either of the operand patterns

getType

public int getType()
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:
getType in class Pattern
Returns:
the type of node matched by this pattern. e.g. Node.ELEMENT or Node.TEXT

toString

public java.lang.String toString()
Get a string representation of the pattern
Overrides:
toString in class java.lang.Object

isRelative

public boolean isRelative()
                   throws org.xml.sax.SAXException
Determine if the pattern uses positional filters
Overrides:
isRelative in class Pattern

getLHS

public Pattern getLHS()
Get the LHS of the union

getRHS

public Pattern getRHS()
Get the RHS of the union