Class ELInterpreterTagSetters

java.lang.Object

org.apache.jasper.optimizations.ELInterpreterTagSetters

All Implemented Interfaces:

ELInterpreter

public class ELInterpreterTagSetters
extends Object
implements ELInterpreter

A non-specification compliant ELInterpreter that optimizes a subset of setters for tag attributes.

The cases optimized by this implementation are:

• expressions that are solely a literal boolean
• expressions that are solely a constant string used (with coercion where necessary) with a setter that accepts:
• • boolean / Boolean
  • char / Character
  • BigDecimal
  • long / Long
  • int / Integer
  • short / Short
  • byte / Byte
  • double / Double
  • float / Float
  • BigInteger
  • Enum
  • String

The specification compliance issue is that it essentially skips the first three ELResolvers listed in section JSP.2.9 and effectively hard codes the use of the 4th ELResolver in that list.

See Also:

• "https://bz.apache.org/bugzilla/show_bug.cgi?id=64872"

Constructor Summary

Constructors

Constructor	Description
ELInterpreterTagSetters()

Method Summary

Modifier and Type	Method	Description
String	interpreterCall(JspCompilationContext context, boolean isTagFile, String expression, Class<?> expectedType, String fnmapvar)	Returns the string representing the code that will be inserted into the servlet generated for JSP.

Methods inherited from class Object

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

Constructor Details

ELInterpreterTagSetters

public ELInterpreterTagSetters()

Method Details

interpreterCall

public String interpreterCall(JspCompilationContext context,
 boolean isTagFile,
 String expression,
 Class<?> expectedType,
 String fnmapvar)

Description copied from interface: ELInterpreter

Returns the string representing the code that will be inserted into the servlet generated for JSP. The default implementation creates a call to PageContextImpl.proprietaryEvaluate(String, Class, jakarta.servlet.jsp.PageContext, org.apache.jasper.runtime.ProtectedFunctionMapper) but other implementations may produce more optimised code.

Specified by:

interpreterCall in interface ELInterpreter

Parameters:

context - The compilation context

isTagFile - true if in a tag file rather than a JSP

expression - a String containing zero or more "${}" expressions

expectedType - the expected type of the interpreted result

fnmapvar - Variable pointing to a function map.

Returns:

a String representing a call to the EL interpreter.