org.settings4j.util

Class ExpressionLanguageUtil

java.lang.Object

org.settings4j.util.ExpressionLanguageUtil

public final class ExpressionLanguageUtil
extends Object

A Simple Variable Resolver for ExpressionLanguage. With the JSTLVariableResolver you need a PageContext-Object with HttpRequest etc.... This class is a Simple Variant of the JSTLVariableResolver who accept a Simple Map as PageContext. Example: 1. create a Map with Values(key="name", value="Herr Mustermann") 2. parse the String "Hello, ${name}" with the given Map 3. result: "Hello, Herr Mustermann".

Author:

Harald.Brabenetz

See Also:

JSTLVariableResolver

Method Summary

Methods

Modifier and Type	Method and Description
static String	evaluateExpressionLanguage(String expression, Map context) Helper-Function to evaluate a Expression to a String.
static Object	evaluateExpressionLanguage(String expression, Map context, Class returnType) Helper-Function to evaluate a Expression to a given Class.

Methods inherited from class java.lang.Object

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

Method Detail

evaluateExpressionLanguage

public static String evaluateExpressionLanguage(String expression,
                                Map context)
                                         throws org.apache.taglibs.standard.lang.jstl.ELException

Helper-Function to evaluate a Expression to a String.

Parameters:

expression - The Expression to be evaluated

context - The context where the expression has Access

Returns:

The Result as String

Throws:

org.apache.taglibs.standard.lang.jstl.ELException - Throw an Exception if the expression is not valid.

evaluateExpressionLanguage

public static Object evaluateExpressionLanguage(String expression,
                                Map context,
                                Class returnType)
                                         throws org.apache.taglibs.standard.lang.jstl.ELException

Helper-Function to evaluate a Expression to a given Class.

Parameters:

expression - The Expression to be evaluated

context - The context where the expression has Access

returnType - the Class-Object who will be returned

Returns:

The Result as the given return-Type

Throws:

org.apache.taglibs.standard.lang.jstl.ELException - Throw an Exception if the expression is not valid.