/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.deltaspike.core.util.metadata.builder;
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.
*
* @see InjectableMethod
*/
public interface ParameterValueRedefiner
{
/**
* 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
*/
Object redefineParameterValue(ParameterValue value);
/**
* Provides the default parameter's value, along with metadata about the
* parameter to a parameter redefinition.
*
* @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);
}
}
}