Package org.apache.xpath.patterns

Class UnionPattern

java.lang.Object
org.apache.xpath.Expression
org.apache.xpath.patterns.UnionPattern
All Implemented Interfaces:
Serializable, SourceLocator, ExpressionNode, XPathVisitable
public class UnionPattern
extends Expression
This class represents a union pattern, which can have multiple individual StepPattern patterns.
See Also:
Serialized Form

  • Constructor Details

    • UnionPattern

      public UnionPattern()

  • Method Details

    • fixupVariables

      public void fixupVariables​(Vector vars, int globalsSize)
      No arguments to process, so this does nothing.
      Specified by:
      fixupVariables in class Expression
      Parameters:
      vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame). NEEDSDOC @param globalsSize

    • canTraverseOutsideSubtree

      public boolean canTraverseOutsideSubtree()
      Tell if this expression or it's subexpressions can traverse outside the current subtree.
      Overrides:
      canTraverseOutsideSubtree in class Expression
      Returns:
      true if traversal outside the context node's subtree can occur.

    • setPatterns

      public void setPatterns​(StepPattern[] patterns)
      Set the contained step patterns to be tested.
      Parameters:
      patterns - the contained step patterns to be tested.

    • getPatterns

      public StepPattern[] getPatterns()
      Get the contained step patterns to be tested.
      Returns:
      an array of the contained step patterns to be tested.

    • execute

      public XObject execute​(XPathContext xctxt) throws TransformerException
      Test a node to see if it matches any of the patterns in the union.
      Specified by:
      execute in class Expression
      Parameters:
      xctxt - XPath runtime context.
      Returns:
      NodeTest.SCORE_NODETEST, NodeTest.SCORE_NONE, NodeTest.SCORE_NSWILD, NodeTest.SCORE_QNAME, or NodeTest.SCORE_OTHER.
      Throws:
      TransformerException

    • callVisitors

      public void callVisitors​(ExpressionOwner owner, XPathVisitor visitor)
      Description copied from interface: XPathVisitable
      This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.
      Parameters:
      owner - The owner of the visitor, where that path may be rewritten if needed.
      visitor - The visitor whose appropriate method will be called.
      See Also:
      XPathVisitable.callVisitors(ExpressionOwner, XPathVisitor)

    • deepEquals

      public boolean deepEquals​(Expression expr)
      Description copied from class: Expression
      Compare this object with another object and see if they are equal, include the sub heararchy.
      Specified by:
      deepEquals in class Expression
      Parameters:
      expr - Another expression object.
      Returns:
      true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.
      See Also:
      Expression.deepEquals(Expression)