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

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.