org.bgp4j.net.capabilities.Capability.java Source code

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Here is the source code for org.bgp4j.net.capabilities.Capability.java

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/**
 *  Copyright 2012 Rainer Bieniek (Rainer.Bieniek@web.de)
 *
 *  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.bgp4j.net.capabilities;

import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;

/**
 * base class for all optional BGP4 protocol capabilities
 * 
 * @author Rainer Bieniek (Rainer.Bieniek@web.de)
 *
 */
public abstract class Capability implements Comparable<Capability> {

    protected static final int ORDER_NUMBER_AS4_CAPABILITY = 1;
    protected static final int ORDER_NUMBER_MULTI_PROTOCOL_CAPABILITY = 2;
    protected static final int ORDER_NUMBER_OUTBOUND_ROUTE_FILTERING_CAPABILITY = 3;
    protected static final int ORDER_NUMBER_ROUTE_REFRESH_CAPABILITY = 4;
    protected static final int ORDER_NUMBER_UNKNOWN_CAPABILITY = 5;

    @Override
    public final boolean equals(Object o) {
        if (!(o instanceof Capability))
            return false;

        Capability other = (Capability) o;

        if (orderNumber() != other.orderNumber())
            return false;

        return equalsSubclass(other);
    }

    @Override
    public final int hashCode() {
        return (new HashCodeBuilder()).append(orderNumber()).append(hashCodeSubclass()).toHashCode();
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }

    /* (non-Javadoc)
     * @see java.lang.Comparable#compareTo(java.lang.Object)
     */
    @Override
    public final int compareTo(Capability other) {
        int val = (new Integer(orderNumber())).compareTo(other.orderNumber());

        if (val != 0)
            return val;

        return compareToSubclass(other);
    }

    protected abstract int orderNumber();

    protected boolean equalsSubclass(Capability other) {
        return true;
    }

    protected int hashCodeSubclass() {
        return 0;
    }

    protected int compareToSubclass(Capability other) {
        return 0;
    }
}