Package org.apache.taglibs.standard.lang.jstl

Class ArraySuffix

  • Direct Known Subclasses:
    PropertySuffix
    public class ArraySuffix
extends ValueSuffix

    Represents an operator that obtains a Map entry, an indexed value, a property value, or an indexed property value of an object. The following are the rules for evaluating this operator: 

       Evaluating a[b] (assuming a.b == a["b"])
   a is null
     return null
   b is null
     return null
   a is Map
     !a.containsKey (b)
       return null
     a.get(b) == null
       return null
     otherwise
       return a.get(b)
   a is List or array
     coerce b to int (using coercion rules)
     coercion couldn't be performed
       error
     a.get(b) or Array.get(a, b) throws ArrayIndexOutOfBoundsException or IndexOutOfBoundsException
       return null
     a.get(b) or Array.get(a, b) throws other exception
       error
     return a.get(b) or Array.get(a, b)
 
   coerce b to String
   b is a readable property of a
     getter throws an exception
       error
     otherwise
       return result of getter call

   otherwise
     error
    Version:
    $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
    Author:
    Nathan Abramson - Art Technology Group, Shawn Bayern

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object evaluate​(java.lang.Object pValue, java.lang.Object pContext, VariableResolver pResolver, java.util.Map functions, java.lang.String defaultPrefix, Logger pLogger)
      Evaluates the expression in the given context, operating on the given value.
      java.lang.String getExpressionString()
      Returns the expression in the expression language syntax
      Expression getIndex()  
      void setIndex​(Expression pIndex)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ArraySuffix

        public ArraySuffix​(Expression pIndex)
        Constructor

    • Method Detail

      • setIndex

        public void setIndex​(Expression pIndex)

      • getExpressionString

        public java.lang.String getExpressionString()
        Returns the expression in the expression language syntax
        Specified by:
        getExpressionString in class ValueSuffix

      • evaluate

        public java.lang.Object evaluate​(java.lang.Object pValue,
                                 java.lang.Object pContext,
                                 VariableResolver pResolver,
                                 java.util.Map functions,
                                 java.lang.String defaultPrefix,
                                 Logger pLogger)
                          throws ELException
        Evaluates the expression in the given context, operating on the given value.
        Specified by:
        evaluate in class ValueSuffix
        Throws:
        ELException