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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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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed 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.jboss.remoting3;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 * A set of attachments for an entity.
 */
public final class Attachments {
    private final ConcurrentMap, Object> map = new ConcurrentHashMap, Object>();

    /** {@inheritDoc} */
    public  T attach(final Key key, final T value) {
        final Class type = key.getType();
        return type.cast(map.put(key, type.cast(value)));
    }

    /** {@inheritDoc} */
    public  T attachIfAbsent(final Key key, final T value) {
        final Class type = key.getType();
        return type.cast(map.putIfAbsent(key, type.cast(value)));
    }

    /** {@inheritDoc} */
    public  boolean replaceAttachment(final Key key, final T expect, final T replacement) {
        return map.replace(key, expect, key.getType().cast(replacement));
    }

    /** {@inheritDoc} */
    public  T removeAttachment(final Key key) {
        return key.getType().cast(map.remove(key));
    }

    /** {@inheritDoc} */
    public  boolean removeAttachment(final Key key, final T value) {
        return map.remove(key, value);
    }

    /** {@inheritDoc} */
    public  T getAttachment(final Key key) {
        return key.getType().cast(map.get(key));
    }

    /**
     * An attachment key.
     *
     * @param  the attachment value type
     */
    public static final class Key {
        private final Class type;

        /**
         * Construct a new instance.
         *
         * @param type the key type class.
         */
        public Key(final Class type) {
            this.type = type;
        }

        /**
         * Get the attachment type class.
         *
         * @return the attachment type class
         */
        public Class getType() {
            return type;
        }
    }
}