Package org.apache.taglibs.standard.lang.support

Class ExpressionEvaluatorManager

  • public class ExpressionEvaluatorManager
extends java.lang.Object

    A conduit to the JSTL EL. Based on...

    An implementation of the ExpressionEvaluatorManager called for by the JSTL rev1 draft. This class is responsible for delegating a request for expression evaluating to the particular, "active" ExpressionEvaluator for the given point in the PageContext object passed in.

    Author:
    Shawn Bayern

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.lang.String EVALUATOR_CLASS  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Object coerce​(java.lang.Object value, java.lang.Class classe)
      Performs a type conversion according to the EL's rules.
      static java.lang.Object evaluate​(java.lang.String attributeName, java.lang.String expression, java.lang.Class expectedType, javax.servlet.jsp.PageContext pageContext)
      Invokes the evaluate() method on the "active" ExpressionEvaluator for the given pageContext.
      static java.lang.Object evaluate​(java.lang.String attributeName, java.lang.String expression, java.lang.Class expectedType, javax.servlet.jsp.tagext.Tag tag, javax.servlet.jsp.PageContext pageContext)
      Invokes the evaluate() method on the "active" ExpressionEvaluator for the given pageContext.
      static ExpressionEvaluator getEvaluatorByName​(java.lang.String name)
      Gets an ExpressionEvaluator from the cache, or seeds the cache if we haven't seen a particular ExpressionEvaluator before.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

    • Constructor Detail

      • ExpressionEvaluatorManager

        public ExpressionEvaluatorManager()

    • Method Detail

      • evaluate

        public static java.lang.Object evaluate​(java.lang.String attributeName,
                                        java.lang.String expression,
                                        java.lang.Class expectedType,
                                        javax.servlet.jsp.tagext.Tag tag,
                                        javax.servlet.jsp.PageContext pageContext)
                                 throws javax.servlet.jsp.JspException
        Invokes the evaluate() method on the "active" ExpressionEvaluator for the given pageContext.
        Throws:
        javax.servlet.jsp.JspException

      • evaluate

        public static java.lang.Object evaluate​(java.lang.String attributeName,
                                        java.lang.String expression,
                                        java.lang.Class expectedType,
                                        javax.servlet.jsp.PageContext pageContext)
                                 throws javax.servlet.jsp.JspException
        Invokes the evaluate() method on the "active" ExpressionEvaluator for the given pageContext.
        Throws:
        javax.servlet.jsp.JspException

      • getEvaluatorByName

        public static ExpressionEvaluator getEvaluatorByName​(java.lang.String name)
                                              throws javax.servlet.jsp.JspException
        Gets an ExpressionEvaluator from the cache, or seeds the cache if we haven't seen a particular ExpressionEvaluator before.
        Throws:
        javax.servlet.jsp.JspException

      • coerce

        public static java.lang.Object coerce​(java.lang.Object value,
                                      java.lang.Class classe)
                               throws javax.servlet.jsp.JspException
        Performs a type conversion according to the EL's rules.
        Throws:
        javax.servlet.jsp.JspException