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// 
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// 
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// 
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// 
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// 
package org.eclipse.jetty.util;

import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;

// @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
@Deprecated(since = "2021-05-27")
public class DeprecationWarning implements Decorator {

    private static final Logger LOG = Log.getLogger(DeprecationWarning.class);

    @Override
    public  T decorate(T o) {
        if (o == null) {
            return null;
        }
        Class clazz = o.getClass();
        try {
            Deprecated depr = clazz.getAnnotation(Deprecated.class);
            if (depr != null) {
                LOG.warn("Using @Deprecated Class {}", clazz.getName());
            }
        } catch (Throwable t) {
            LOG.ignore(t);
        }
        verifyIndirectTypes(clazz.getSuperclass(), clazz, "Class");
        for (Class ifaceClazz : clazz.getInterfaces()) {
            verifyIndirectTypes(ifaceClazz, clazz, "Interface");
        }
        return o;
    }

    private void verifyIndirectTypes(Class superClazz, Class clazz, String typeName) {
        try {
            // Report on super class deprecation too
            while (superClazz != null && superClazz != Object.class) {
                Deprecated supDepr = superClazz.getAnnotation(Deprecated.class);
                if (supDepr != null) {
                    LOG.warn("Using indirect @Deprecated {} {} - (seen from {})", typeName, superClazz.getName(), clazz);
                }
                superClazz = superClazz.getSuperclass();
            }
        } catch (Throwable t) {
            LOG.ignore(t);
        }
    }

    @Override
    public void destroy(Object o) {
    }
}