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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.bval.jsr.util;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public final class Proxies {
    private static final Set KNOWN_PROXY_CLASSNAMES;

    static {
        final Set s = new HashSet();
        s.add("org.jboss.weld.bean.proxy.ProxyObject");
        KNOWN_PROXY_CLASSNAMES = Collections.unmodifiableSet(s);
    }

    // get rid of proxies which probably contains wrong annotation metamodel
    public static  Class classFor(final Class clazz) { // TODO: do we want a SPI with impl for guice, owb, openejb, ...?
        if (isProxyClass(clazz)) {
            final Class parent = clazz.getSuperclass();
            if (parent != null) {
                return classFor(clazz.getSuperclass());
            }
        }
        return clazz;
    }

    private static boolean isProxyClass(Class clazz) {
        if (KNOWN_PROXY_CLASSNAMES.contains(clazz.getName())) {
            return true;
        }
        return clazz.getSimpleName().contains("$$");// a lot of proxies use this convention to avoid conflicts with inner/anonymous classes
    }

    private Proxies() {
        // no-op
    }
}