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https://issues.apache.org/jira/browse/CAMEL-12683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16556083#comment-16556083
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Zoran Regvart commented on CAMEL-12683:
---------------------------------------
Camel already has support for
[SpEL|https://github.com/apache/camel/blob/master/components/camel-spring/src/main/docs/spel-language.adoc]
and you can access methods of objects found in registry using the [bean method
language|https://github.com/apache/camel/blob/master/camel-core/src/main/docs/bean-language.adoc].
[~christianr] can you explain what would this add that those two already
supported features do not?
> When lookup the registry, Camel should support more complex expressions like
> 'myBean.property'
> ----------------------------------------------------------------------------------------------
>
> Key: CAMEL-12683
> URL: https://issues.apache.org/jira/browse/CAMEL-12683
> Project: Camel
> Issue Type: Improvement
> Components: camel-spring
> Affects Versions: 2.21.1
> Reporter: Christian Ribeaud
> Priority: Major
>
> Currently, only simple *Spring* beans lookup is supported, like {{#myBean}}.
> Deeper lookup is currently not supported. As a workaround, you could specify
> several *Spring* beans which then maps to the properties of the original bean.
> Following code snipped would, for instance, make possible more complex
> queries:
> {code:java}
> public class MyApplicationContextRegistry extends ApplicationContextRegistry {
> private final BeanResolver beanResolver;
> private final PropertyAccessor propertyAccessor;
> private final BeanExpressionContext beanExpressionContext;
> MyApplicationContextRegistry(ApplicationContext applicationContext) {
> super(applicationContext);
> beanResolver = new BeanFactoryResolver(applicationContext);
> propertyAccessor = new BeanExpressionContextAccessor();
> beanExpressionContext = createExpressionContext(applicationContext);
> }
> @Override
> public Object lookupByName(final String name) {
> assert name != null : "Unspecified name";
> final ExpressionParser parser = new SpelExpressionParser();
> Expression expression = parser.parseExpression(name);
> Object expressionValue =
> expression.getValue(createEvaluationContext(), beanExpressionContext);
> return expressionValue;
> }
> private static BeanExpressionContext
> createExpressionContext(ApplicationContext applicationContext) {
> assert applicationContext instanceof ConfigurableApplicationContext :
> String.format("MUST be an instance of '%s'.",
> ConfigurableApplicationContext.class.getName());
> ConfigurableBeanFactory configurableBeanFactory =
> ((ConfigurableApplicationContext) applicationContext).getBeanFactory();
> return new BeanExpressionContext(configurableBeanFactory, null);
> }
> private EvaluationContext createEvaluationContext() {
> StandardEvaluationContext context = new StandardEvaluationContext();
> context.setBeanResolver(beanResolver);
> context.addPropertyAccessor(propertyAccessor);
> return context;
> }
> }
> {code}
> And this code uses _out-of-the-box_ *Spring* functionalities (I think...).
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