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org.apache.taglibs.standard.lang.jstl
Class Evaluator  

java.lang.Object
  org.apache.taglibs.standard.lang.jstl.Evaluator

All Implemented Interfaces:

org.apache.taglibs.standard.lang.support.ExpressionEvaluator

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public class Evaluator

extends java.lang.Object

implements org.apache.taglibs.standard.lang.support.ExpressionEvaluator

This is the expression evaluator "adapter" that customizes it for use with the JSP Standard Tag Library. It uses a VariableResolver implementation that looks up variables from the PageContext and also implements its implicit objects. It also wraps ELExceptions in JspExceptions that describe the attribute name and value causing the error.

Version:

$Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: pierred $

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Field Summary
(package private) static ELEvaluator	sEvaluator           The singleton instance of the evaluator

 

Constructor Summary

Evaluator()

 

Method Summary
java.lang.Object	evaluate(java.lang.String pAttributeName, java.lang.String pAttributeValue, java.lang.Class pExpectedType, javax.servlet.jsp.tagext.Tag pTag, javax.servlet.jsp.PageContext pPageContext)           Conduit to old-style call for convenience.
java.lang.Object	evaluate(java.lang.String pAttributeName, java.lang.String pAttributeValue, java.lang.Class pExpectedType, javax.servlet.jsp.tagext.Tag pTag, javax.servlet.jsp.PageContext pPageContext, java.util.Map functions, java.lang.String defaultPrefix)           Evaluates the expression at request time
static java.lang.String	parseAndRender(java.lang.String pAttributeValue)           Parses the given attribute value, then converts it back to a String in its canonical form.
java.lang.String	validate(java.lang.String pAttributeName, java.lang.String pAttributeValue)           Translation time validation of an attribute value.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

sEvaluator

static ELEvaluator sEvaluator

The singleton instance of the evaluator

Constructor Detail

Evaluator

public Evaluator()

Method Detail

validate

public java.lang.String validate(java.lang.String pAttributeName,
                                 java.lang.String pAttributeValue)

Translation time validation of an attribute value. This method will return a null String if the attribute value is valid; otherwise an error message.

Specified by:

validate in interface org.apache.taglibs.standard.lang.support.ExpressionEvaluator

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evaluate

public java.lang.Object evaluate(java.lang.String pAttributeName,
                                 java.lang.String pAttributeValue,
                                 java.lang.Class pExpectedType,
                                 javax.servlet.jsp.tagext.Tag pTag,
                                 javax.servlet.jsp.PageContext pPageContext,
                                 java.util.Map functions,
                                 java.lang.String defaultPrefix)
                          throws javax.servlet.jsp.JspException

Evaluates the expression at request time

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evaluate

public java.lang.Object evaluate(java.lang.String pAttributeName,
                                 java.lang.String pAttributeValue,
                                 java.lang.Class pExpectedType,
                                 javax.servlet.jsp.tagext.Tag pTag,
                                 javax.servlet.jsp.PageContext pPageContext)
                          throws javax.servlet.jsp.JspException

Conduit to old-style call for convenience.

Specified by:

evaluate in interface org.apache.taglibs.standard.lang.support.ExpressionEvaluator

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parseAndRender

public static java.lang.String parseAndRender(java.lang.String pAttributeValue)
                                       throws javax.servlet.jsp.JspException

Parses the given attribute value, then converts it back to a String in its canonical form.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> taglibs >> standard >> lang >> [ jstl overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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