MBeanIntrospector.java 文件源码

final PerInterface<M> getPerInterface(Class<?> mbeanInterface)
throws NotCompliantMBeanException {
    PerInterfaceMap<M> map = getPerInterfaceMap();
    synchronized (map) {
        WeakReference<PerInterface<M>> wr = map.get(mbeanInterface);
        PerInterface<M> pi = (wr == null) ? null : wr.get();
        if (pi == null) {
            try {
                MBeanAnalyzer<M> analyzer = getAnalyzer(mbeanInterface);
                MBeanInfo mbeanInfo =
                        makeInterfaceMBeanInfo(mbeanInterface, analyzer);
                pi = new PerInterface<M>(mbeanInterface, this, analyzer,
                        mbeanInfo);
                wr = new WeakReference<PerInterface<M>>(pi);
                map.put(mbeanInterface, wr);
            } catch (Exception x) {
                throw Introspector.throwException(mbeanInterface,x);
            }
        }
        return pi;
    }
}