package org.infinispan.cdi.common.util;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
/**
* Provides the ability to redefine the value of a parameter on an
* {@link InjectableMethod} via the
* {@link #redefineParameterValue(ParameterValue)} callback.
*
* @author Pete Muir
* @see InjectableMethod
*/
public interface ParameterValueRedefiner {
/**
* Provides the default parameter's value, along with metadata about the
* parameter to a parameter redefinition.
*
* @author Pete Muir
* @see ParameterValueRedefiner
* @see InjectableMethod
*/
public static class ParameterValue {
private final int position;
private final InjectionPoint injectionPoint;
private final BeanManager beanManager;
ParameterValue(int position, InjectionPoint injectionPoint, BeanManager beanManager) {
this.position = position;
this.injectionPoint = injectionPoint;
this.beanManager = beanManager;
}
/**
* Get the position of the parameter in the member's parameter list.
*
* @return the position of the parameter
*/
public int getPosition() {
return position;
}
/**
* Get the {@link InjectionPoint} for the parameter.
*
* @return the injection point
*/
public InjectionPoint getInjectionPoint() {
return injectionPoint;
}
/**
* Get the default value of the parameter. The default value is that which
* would be injected according to the CDI type safe resolution rules.
*
* @param creationalContext the creationalContext to use to obtain the
* injectable reference.
* @return the default value
*/
public Object getDefaultValue(CreationalContext<?> creationalContext) {
return beanManager.getInjectableReference(injectionPoint, creationalContext);
}
}
/**
* Callback allowing the default parameter value (that which would be
* injected according to the CDI type safe resolution rules) to be
* overridden.
*
* @param value the default value
* @return the overridden value
*/
public Object redefineParameterValue(ParameterValue value);
}