/*
* 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 javax.enterprise.inject.Typed;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.util.Nonbinding;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Arrays;
@Typed()
public abstract class AnnotationUtils
{
private AnnotationUtils()
{
// prevent instantiation
}
public static <T extends Annotation> T extractAnnotationFromMethodOrClass(
BeanManager beanManager, Method targetMethod, Class targetClass, Class<T> targetAnnotationType)
{
T result = extractAnnotationFromMethod(beanManager, targetMethod, targetAnnotationType);
if (result == null)
{
//see DELTASPIKE-517
Class unproxiedTargetClass = ProxyUtils.getUnproxiedClass(targetClass);
// and if not found search on the class
result = findAnnotation(beanManager, unproxiedTargetClass.getAnnotations(), targetAnnotationType);
}
return result;
}
public static <T extends Annotation> T extractAnnotationFromMethod(
BeanManager beanManager, Method targetMethod, Class<T> targetAnnotationType)
{
return findAnnotation(beanManager, targetMethod.getAnnotations(), targetAnnotationType);
}
public static <T extends Annotation> T findAnnotation(
BeanManager beanManager, Annotation[] annotations, Class<T> targetAnnotationType)
{
for (Annotation annotation : annotations)
{
if (targetAnnotationType.equals(annotation.annotationType()))
{
return (T) annotation;
}
if (beanManager.isStereotype(annotation.annotationType()))
{
T result = findAnnotation(
beanManager, annotation.annotationType().getAnnotations(), targetAnnotationType);
if (result != null)
{
return result;
}
}
}
return null;
}
//based on org.apache.webbeans.container.BeanCacheKey#getQualifierHashCode
public static int getQualifierHashCode(Annotation annotation)
{
Class annotationClass = annotation.annotationType();
int hashCode = getTypeHashCode(annotationClass);
for (Method member : annotationClass.getDeclaredMethods())
{
if (member.isAnnotationPresent(Nonbinding.class))
{
continue;
}
final Object annotationMemberValue = ReflectionUtils.invokeMethod(annotation, member, Object.class, true);
final int arrayValue;
if (annotationMemberValue == null /*possible with literals*/)
{
arrayValue = 0;
}
else if (annotationMemberValue.getClass().isArray())
{
Class<?> annotationMemberType = annotationMemberValue.getClass().getComponentType();
if (annotationMemberType.isPrimitive())
{
if (Long.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((long[]) annotationMemberValue);
}
else if (Integer.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((int[]) annotationMemberValue);
}
else if (Short.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((short[]) annotationMemberValue);
}
else if (Double.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((double[]) annotationMemberValue);
}
else if (Float.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((float[]) annotationMemberValue);
}
else if (Boolean.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((boolean[]) annotationMemberValue);
}
else if (Byte.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((byte[]) annotationMemberValue);
}
else if (Character.TYPE == annotationMemberType)
{
arrayValue = Arrays.hashCode((char[]) annotationMemberValue);
}
else
{
arrayValue = 0;
}
}
else
{
arrayValue = Arrays.hashCode((Object[]) annotationMemberValue);
}
}
else
{
arrayValue = annotationMemberValue.hashCode();
}
hashCode = 29 * hashCode + arrayValue;
hashCode = 29 * hashCode + member.getName().hashCode();
}
return hashCode;
}
private static int getTypeHashCode(Type type)
{
int typeHash = type.hashCode();
if (typeHash == 0 && type instanceof Class)
{
return ((Class)type).getName().hashCode();
}
return typeHash;
}
}