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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.handler.codec.serialization;

import java.lang.ref.Reference;
import java.util.Collection;
import java.util.Map;
import java.util.Set;

abstract class ReferenceMap implements Map {

    private final Map> delegate;

    protected ReferenceMap(Map> delegate) {
        this.delegate = delegate;
    }

    abstract Reference fold(V value);

    private V unfold(Reference ref) {
        if (ref == null) {
            return null;
        }

        return ref.get();
    }

    @Override
    public int size() {
        return delegate.size();
    }

    @Override
    public boolean isEmpty() {
        return delegate.isEmpty();
    }

    @Override
    public boolean containsKey(Object key) {
        return delegate.containsKey(key);
    }

    @Override
    public boolean containsValue(Object value) {
        throw new UnsupportedOperationException();
    }

    @Override
    public V get(Object key) {
        return unfold(delegate.get(key));
    }

    @Override
    public V put(K key, V value) {
        return unfold(delegate.put(key, fold(value)));
    }

    @Override
    public V remove(Object key) {
        return unfold(delegate.remove(key));
    }

    @Override
    public void putAll(Map m) {
        for (Entry entry : m.entrySet()) {
            delegate.put(entry.getKey(), fold(entry.getValue()));
        }
    }

    @Override
    public void clear() {
        delegate.clear();
    }

    @Override
    public Set keySet() {
        return delegate.keySet();
    }

    @Override
    public Collection values() {
        throw new UnsupportedOperationException();
    }

    @Override
    public Set> entrySet() {
        throw new UnsupportedOperationException();
    }
}