org.apache.jasper.compiler
Interface ELInterpreter

All Known Implementing Classes:

ELInterpreterFactory.DefaultELInterpreter

public interface ELInterpreter

Defines the interface for the expression language interpreter. This allows users to provide custom EL interpreter implementations that can optimise EL processing for an application by , for example, performing code generation for simple expressions.

Method Summary

String

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

Method Detail

interpreterCall

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

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, javax.servlet.jsp.PageContext, org.apache.jasper.runtime.ProtectedFunctionMapper, boolean) but other implementations may produce more optimised code.

Parameters:

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

expectedType - the expected type of the interpreted result

fnmapvar - Variable pointing to a function map.

xmlEscape - True if the result should do XML escaping

Returns:

a String representing a call to the EL interpreter.