com.mysema.util.Annotations Maven / Gradle / Ivy
/*
* Copyright 2011, Mysema Ltd
*
* 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
* limitations under the License.
*/
package com.mysema.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Annotations is a merging adapter for the {@link AnnotatedElement} interface
*
* @author tiwe
*
*/
public class Annotations implements AnnotatedElement {
private final Map,Annotation> annotations = new HashMap,Annotation>();
public Annotations(AnnotatedElement... elements) {
for (AnnotatedElement element : elements) {
for (Annotation annotation : element.getAnnotations()) {
annotations.put(annotation.annotationType(), annotation);
}
}
}
@SuppressWarnings("unchecked")
@Override
public T getAnnotation(Class annotationClass) {
return (T) annotations.get(annotationClass);
}
@Override
public Annotation[] getAnnotations() {
return annotations.values().toArray(new Annotation[annotations.values().size()]);
}
@Override
public Annotation[] getDeclaredAnnotations() {
return getAnnotations();
}
@Override
public boolean isAnnotationPresent(Class annotationClass) {
return annotations.containsKey(annotationClass);
}
public void addAnnotation(@Nullable Annotation annotation) {
if (annotation != null) {
annotations.put(annotation.annotationType(), annotation);
}
}
}