Christian Ribeaud created CAMEL-12683:
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Summary: 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
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;
ProdicApplicationContextRegistry(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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