Package org.apache.catalina.ssi

Class ExpressionParseTree

  • public class ExpressionParseTree
extends java.lang.Object
    Represents a parsed expression.
    Author:
    Paul Speed

    • Constructor Summary

      Constructors 
      Constructor Description
      ExpressionParseTree​(java.lang.String expr, SSIMediator ssiMediator)
      Creates a new parse tree for the specified expression.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean evaluateTree()
      Evaluates the tree and returns true or false.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • ExpressionParseTree

        public ExpressionParseTree​(java.lang.String expr,
                           SSIMediator ssiMediator)
                    throws java.text.ParseException
        Creates a new parse tree for the specified expression.
        Parameters:
        expr - The expression string
        ssiMediator - Used to evaluated the expressions
        Throws:
        java.text.ParseException - a parsing error occurred

    • Method Detail

      • evaluateTree

        public boolean evaluateTree()
                     throws SSIStopProcessingException
        Evaluates the tree and returns true or false. The specified SSIMediator is used to resolve variable references.
        Returns:
        the evaluation result
        Throws:
        SSIStopProcessingException - If an error occurs evaluating the tree