AttributedCharacterIterator.java 文件源码

/**
 * Resolves instances being deserialized to the predefined constants.
 *
 * @return the resolved {@code Attribute} object
 * @throws InvalidObjectException if the object to resolve is not
 *                                an instance of {@code Attribute}
 */
protected Object readResolve() throws InvalidObjectException {
    if (this.getClass() != Attribute.class) {
        throw new InvalidObjectException("subclass didn't correctly implement readResolve");
    }

    Attribute instance = instanceMap.get(getName());
    if (instance != null) {
        return instance;
    } else {
        throw new InvalidObjectException("unknown attribute name");
    }
}