AnnotatedParameterConfigurator.java

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 * Copyright 2016, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed 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
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 */
package javax.enterprise.inject.spi.configurator;

import java.lang.annotation.Annotation;
import java.util.function.Predicate;

import javax.enterprise.inject.spi.AnnotatedParameter;

/**
 *
 * This interface is part of the {@link AnnotatedTypeConfigurator} SPI and helps defining an {@link AnnotatedParameter}
 *
 * @author Martin Kouba
 * @author Antoine Sabot-Durand
 * @since 2.0
 * @param <T> the class containing the method declaring the parameter
 */
public interface AnnotatedParameterConfigurator<T> {
    
    /**
     * 
     * @return the original {@link AnnotatedParameter}
     */
    AnnotatedParameter<T> getAnnotated();
    
    /**
     * Add an annotation to the parameter.
     *
     * @param annotation the annotation to add
     * @return self
     */
    AnnotatedParameterConfigurator<T> add(Annotation annotation);
    
    /**
     * Remove annotations that match the specified predicate.
     *
     * <p>
     * Example predicates:</code>
     * </p>
     * 
     * <pre>
     *  {@code
     * // To remove all the annotations:
     * (a) -> true
     * 
     * // To remove annotations with a concrete annotation type:
     * (a) -> a.annotationType().equals(Foo.class)
     * 
     * // To remove annotation equal to a specified object:
     * (a) -> a.equals(fooAnnotation)
     * 
     * // To remove annotations that are considered equivalent for the purposes of typesafe resolution:
     * (a) -> beanManager.areQualifiersEquivalent(a, fooQualifier)
     * (a) -> beanManager.areInterceptorBindingsEquivalent(a, fooInterceptorBinding)
     * }
     * </pre>
     * 
     * @param predicate {@link Predicate} used to filter annotations to remove
     * @return self
     */
    AnnotatedParameterConfigurator<T> remove(Predicate<Annotation> predicate);
    
    /**
     * Remove all the annotations.
     * 
     * @return self
     */
    default     AnnotatedParameterConfigurator<T> removeAll() {
        return remove((a) -> true);
    }

}