Class PredicateSet

java.lang.Object
org.jaxen.expr.PredicateSet
All Implemented Interfaces:
Serializable

public class PredicateSet extends Object implements Serializable

Represents the collection of predicates that follow the node-test in a location path.

There is no rule that the same predicate may not appear twice in an XPath expression, nor does this class enforce any such rule. This is implemented more as a list than a set. However, adding the swme predicate twice should have no effect on the final result other than slowing it down.

See Also:
  • Constructor Details

    • PredicateSet

      public PredicateSet()
      Create a new empty predicate set.
  • Method Details

    • addPredicate

      public void addPredicate(Predicate predicate)
      Add a predicate to the set.
      Parameters:
      predicate - the predicate to be inserted
    • getPredicates

      public List getPredicates()
      Returns the list containing the predicates. This list is live, not a copy.
      Returns:
      a live list of predicates
    • simplify

      public void simplify()
      Simplify each of the predicates in the list.
    • getText

      public String getText()
      Returns the XPath string containing each of the predicates.
      Returns:
      the XPath string containing each of the predicates
    • evaluateAsBoolean

      protected boolean evaluateAsBoolean(List contextNodeSet, ContextSupport support) throws JaxenException

      Returns true if any of the supplied nodes satisfy all the predicates in the set. Returns false if none of the supplied nodes matches all the predicates in the set. Returns false if the node-set is empty.

      Parameters:
      contextNodeSet - the nodes to test against these predicates
      support - ????
      Returns:
      true if any node in the contextNodeSet matches all the predicates
      Throws:
      JaxenException
    • evaluatePredicates

      protected List evaluatePredicates(List contextNodeSet, ContextSupport support) throws JaxenException

      Returns all of the supplied nodes that satisfy all the predicates in the set.

      Parameters:
      contextNodeSet - the nodes to test against these predicates
      support - ????
      Returns:
      all the nodes that match each of the predicates
      Throws:
      JaxenException
    • applyPredicate

      public List applyPredicate(Predicate predicate, List nodes2Filter, ContextSupport support) throws JaxenException
      Throws:
      JaxenException