ExternalMetadataReader.java 文件源码

private Annotation[] doMerge(Annotation[] annotations, Annotation[] externalAnnotations) {
    HashMap<String, Annotation> mergeMap = new HashMap<String, Annotation>();
    if (annotations != null) {
        for (Annotation reflectionAnnotation : annotations) {
            mergeMap.put(reflectionAnnotation.annotationType().getName(), reflectionAnnotation);
        }
    }

    // overriding happens here, based on annotationType().getName() ...
    if (externalAnnotations != null) {
        for (Annotation externalAnnotation : externalAnnotations) {
            mergeMap.put(externalAnnotation.annotationType().getName(), externalAnnotation);
        }
    }
    Collection<Annotation> values = mergeMap.values();
    int size = values.size();
    return size == 0 ? null : values.toArray(new Annotation[size]);
}