DefaultMXBeanMappingFactory.java 文件源码

CollectionMapping(Type targetType,
                  ArrayType<?> openArrayType,
                  Class<?> openArrayClass,
                  MXBeanMapping elementMapping) {
    super(targetType, openArrayType);
    this.elementMapping = elementMapping;

    /* Determine the concrete class to be used when converting
       back to this Java type.  We convert all Lists to ArrayList
       and all Sets to TreeSet.  (TreeSet because it is a SortedSet,
       so works for both Set and SortedSet.)  */
    Type raw = ((ParameterizedType) targetType).getRawType();
    Class<?> c = (Class<?>) raw;
    final Class<?> collC;
    if (c == List.class)
        collC = ArrayList.class;
    else if (c == Set.class)
        collC = HashSet.class;
    else if (c == SortedSet.class)
        collC = TreeSet.class;
    else { // can't happen
        assert(false);
        collC = null;
    }
    collectionClass = Util.cast(collC);
}