Method createAdapter

src/main/java/groovy/util/ProxyGenerator.java:356–373

(final Map<Object,Object> closureMap, final List<Class> interfaceList, final Class delegateClass, final Class baseClass)

    }

    private ProxyGeneratorAdapter createAdapter(final Map<Object,Object> closureMap, final List<Class> interfaceList, final Class delegateClass, final Class baseClass) {
        Class[] interfaces = interfaceList != null ? interfaceList.toArray(EMPTY_CLASS_ARRAY) : EMPTY_CLASS_ARRAY;
        final Class<?> base = baseClass != null ? baseClass : (interfaces.length > 0 ? interfaces[0] : Object.class);
        final int closureMapSize = closureMap.size();
        Set<String> methodNames = closureMapSize == 0 ? Collections.emptySet() : new HashSet<>(closureMapSize);
        for (Object key : closureMap.keySet()) {
            methodNames.add(key.toString());
        }
        boolean useDelegate = (delegateClass != null);
        CacheKey key = new CacheKey(base, useDelegate ? delegateClass : Object.class, methodNames, interfaces, emptyMethods, useDelegate);
        ClassLoader classLoader = useDelegate ? delegateClass.getClassLoader() : base.getClassLoader();

        synchronized (adapterCache) {
            return adapterCache.computeIfAbsent(key,
                        k -> new ProxyGeneratorAdapter(closureMap, base, interfaces, classLoader, emptyMethods,
                                                                    useDelegate ? delegateClass : null));
        }
    }

    private static void setMetaClass(final MetaClass metaClass) {
        final MetaClass newMetaClass = new DelegatingMetaClass(metaClass) {