Evaluate a bean expression with Spring EL with application context beans

[o besga]

I've been working on this a few days, searching for a solution but I'm stuck.


In my java application (command line, not web) I'm using Spring to wire the application classes. In my applicationContext.xml I have this

<bean id="appProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="location" value="classpath:config/#{systemProperties['ENV']?:'LOCAL'}.properties"/> </bean>

This works fine. Inside my app I want to evaluate similar strings, and I've developed this method

@Component("myAppAware ") 
public class MyAppAware implements BeanFactoryAware { 

@Autowired 
private ApplicationContext applicationContext; 


private BeanFactory beanFactory; 

@Override 
public void setBeanFactory(BeanFactory beanFactory) throws BeansException { this.beanFactory = beanFactory; } 

public String process(){ 
    String toParse = "classpath:config/#{systemProperties['ENV']?:'LOCAL'}.properties"; 
    BeanFactoryResolver beanFactoryResolver = new BeanFactoryResolver(beanFactory); 
    StandardEvaluationContext context = new StandardEvaluationContext(); 
    context.setBeanResolver(beanFactoryResolver); 
    SpelExpressionParser parser = new SpelExpressionParser(); 
    TemplateParserContext templateContext = new TemplateParserContext(); 
    Expression expression = parser.parseExpression(toParse,templateContext); 
    Object ovalue = expression.getValue(context); // EXCEPTION THROWN HERE !!! 
    String value = ovalue.toString(); 
    return value; 
} 

But when I run this code, a error is thrown

org.springframework.expression.spel.SpelEvaluationException: EL1007E:(pos 0): Field or property 'systemProperties' cannot be found on null 
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:243) 
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:112) 
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:107) 

I think I'm near my objective, but I do not know how to get application context beans into he parser, or how to get it working anyone could help ?

[Jayesh A Lalwani]

Do you mind putting the complete stack trace? Also, which version of Spring are you using?

[Partheban Udayakumar]

Welcome to code ranch.

I think you have cross posted this question from here

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