/*
* 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;
import org.apache.deltaspike.core.util.metadata.builder.ImmutableInjectionPoint;
import javax.enterprise.inject.Typed;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* A set of utility methods for working with beans.
*/
@Typed()
public abstract class BeanUtils
{
private BeanUtils()
{
// prevent instantiation
}
/**
* Extract the qualifiers from a set of annotations.
*
* @param beanManager the beanManager to use to determine if an annotation is
* a qualifier
* @param annotations the annotations to check
* @return any qualifiers present in <code>annotations</code>
*/
@SuppressWarnings("unchecked")
public static Set<Annotation> getQualifiers(BeanManager beanManager, Iterable<Annotation> annotations)
{
Set<Annotation> qualifiers = new HashSet<Annotation>();
for (Annotation annotation : annotations)
{
if (beanManager.isQualifier(annotation.annotationType()))
{
qualifiers.add(annotation);
}
}
return qualifiers;
}
/**
* Extract the qualifiers from a set of annotations.
*
* @param beanManager the beanManager to use to determine if an annotation is
* a qualifier
* @param annotations the annotations to check
* @return any qualifiers present in <code>annotations</code>
*/
public static Set<Annotation> getQualifiers(BeanManager beanManager, Annotation[]... annotations)
{
Set<Annotation> qualifiers = new HashSet<Annotation>();
for (Annotation[] annotationArray : annotations)
{
for (Annotation annotation : annotationArray)
{
if (beanManager.isQualifier(annotation.annotationType()))
{
qualifiers.add(annotation);
}
}
}
return qualifiers;
}
/**
* @param annotated element to search in
* @param targetType target type to search for
* @param <T> type of the Annotation which get searched
* @return annotation instance extracted from the annotated member
*/
public static <T extends Annotation> T extractAnnotation(Annotated annotated, Class<T> targetType)
{
T result = annotated.getAnnotation(targetType);
if (result == null)
{
for (Annotation annotation : annotated.getAnnotations())
{
result = annotation.annotationType().getAnnotation(targetType);
if (result != null)
{
break;
}
}
}
return result;
}
/**
* Given a method, and the bean on which the method is declared, create a
* collection of injection points representing the parameters of the method.
*
* @param <X> the type declaring the method
* @param method the method
* @param declaringBean the bean on which the method is declared
* @param beanManager the bean manager to use to create the injection points
* @return the injection points
*/
public static <X> List<InjectionPoint> createInjectionPoints(AnnotatedMethod<X> method, Bean<?> declaringBean,
BeanManager beanManager)
{
List<InjectionPoint> injectionPoints = new ArrayList<InjectionPoint>();
for (AnnotatedParameter<X> parameter : method.getParameters())
{
InjectionPoint injectionPoint =
new ImmutableInjectionPoint(parameter, beanManager, declaringBean, false, false);
injectionPoints.add(injectionPoint);
}
return injectionPoints;
}
}