esa.mo.mal.impl.broker.BrokerKey Maven / Gradle / Ivy

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/* ----------------------------------------------------------------------------
 * Copyright (C) 2013      European Space Agency
 *                         European Space Operations Centre
 *                         Darmstadt
 *                         Germany
 * ----------------------------------------------------------------------------
 * System                : CCSDS MO MAL Java Implementation
 * ----------------------------------------------------------------------------
 * Licensed under the European Space Agency Public License, Version 2.0
 * You may not use this file except in compliance with the License.
 *
 * Except as expressly set forth in this License, the Software is provided to
 * You on an "as is" basis and without warranties of any kind, including without
 * limitation merchantability, fitness for a particular purpose, absence of
 * defects or errors, accuracy or non-infringement of intellectual property rights.
 * 
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 * ----------------------------------------------------------------------------
 */
package esa.mo.mal.impl.broker;

import org.ccsds.moims.mo.mal.transport.MALMessageHeader;

/**
 * Simple class that represents a MAL level broker key. Brokers are separated on
 * the URI of the broker and the session. This allows a broker to host several
 * contexts separated by session.
 */
public class BrokerKey implements Comparable {

    private static final int HASH_MAGIC_NUMBER = 79;
    private final String uri;
    private final int session;
    private final String sessionName;

    /**
     * Constructor.
     *
     * @param hdr Source message.
     */
    public BrokerKey(final MALMessageHeader hdr) {
        this.uri = hdr.getURITo().getValue();
        this.session = hdr.getSession().getOrdinal();
        this.sessionName = hdr.getSessionName().getValue();
    }

    /**
     * Constructor.
     *
     * @param uri Broker URI
     * @param session Broker session enumeration ordinal
     * @param sessionName Broker session name
     */
    public BrokerKey(String uri, int session, String sessionName) {
        this.uri = uri;
        this.session = session;
        this.sessionName = sessionName;
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj instanceof BrokerKey) {
            final BrokerKey other = (BrokerKey) obj;
            if (uri == null) {
                if (other.uri != null) {
                    return false;
                }
            } else {
                if (!uri.equals(other.uri)) {
                    return false;
                }
            }
            if (session != other.session) {
                return false;
            }
            if (sessionName == null) {
                if (other.sessionName != null) {
                    return false;
                }
            } else {
                if (!sessionName.equals(other.sessionName)) {
                    return false;
                }
            }
            return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        int hash = 3;
        hash = HASH_MAGIC_NUMBER * hash + (this.uri != null ? this.uri.hashCode() : 0);
        hash = HASH_MAGIC_NUMBER * hash + this.session;
        hash = HASH_MAGIC_NUMBER * hash + (this.sessionName != null ? this.sessionName.hashCode() : 0);
        return hash;
    }

    @Override
    public int compareTo(final Object o) {
        final BrokerKey other = (BrokerKey) o;

        if (uri.equals(other.uri)) {
            if (session == other.session) {
                if (sessionName.equals(other.sessionName)) {
                    return 0;
                } else {
                    return sessionName.compareTo(other.sessionName);
                }
            } else {
                return session - other.session;
            }
        } else {
            return uri.compareTo(other.uri);
        }
    }
}