Class ParentNodeExpression

java.lang.Object
com.icl.saxon.expr.Expression
com.icl.saxon.expr.NodeSetExpression
com.icl.saxon.expr.SingletonExpression
com.icl.saxon.expr.ParentNodeExpression
public class ParentNodeExpression extends SingletonExpression
Class ParentNodeExpression represents the XPath expression ".." or "parent::node()"

  • Constructor Details

    • ParentNodeExpression

      public ParentNodeExpression()

  • Method Details

    • getNode

      public NodeInfo getNode(Context context) throws XPathException
      Return the node selected by this SingletonExpression
      Specified by:
      getNode in class SingletonExpression
      Parameters:
      context - The context for the evaluation
      Returns:
      the parent of the current node defined by the context
      Throws:
      XPathException

    • getDependencies

      public int getDependencies()
      Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as Context.VARIABLES and Context.CURRENT_NODE
      Specified by:
      getDependencies in class Expression

    • evaluateAsString

      public String evaluateAsString(Context context) throws XPathException
      Evaluate as a string. Returns the string value of the parent node
      Overrides:
      evaluateAsString in class SingletonExpression
      Parameters:
      context - The context in which the expression is to be evaluated
      Returns:
      the value of the current node, identified by the context
      Throws:
      XPathException

    • evaluateAsBoolean

      public boolean evaluateAsBoolean(Context context) throws XPathException
      Evaluate as a boolean. Returns true if there are any nodes selected by the NodeSetExpression.
      Overrides:
      evaluateAsBoolean in class SingletonExpression
      Parameters:
      context - The context in which the expression is to be evaluated
      Returns:
      true unless the current node is the Document node
      Throws:
      XPathException

    • reduce

      public Expression reduce(int dependencies, Context context) throws XPathException
      Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.
      Specified by:
      reduce in class Expression
      Parameters:
      dependencies - The dependencies to be removed
      context - The context to be used for the partial evaluation
      Returns:
      a new expression that does not have any of the specified dependencies
      Throws:
      XPathException

    • display

      public void display(int level)
      Diagnostic print of expression structure
      Specified by:
      display in class Expression