Link.java

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/* Copyright 2017 Telstra Open Source
 *
 *   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.openkilda.topo;

public class Link implements ITopoSlug {

    private final LinkEndpoint src;
    private final LinkEndpoint dst;
    private String slug;
    private String shortSlug;

    public Link(LinkEndpoint src, LinkEndpoint dst) {
        this.src = src;
        this.dst = dst;
    }

    public LinkEndpoint getSrc() {
        return src;
    }

    public LinkEndpoint getDst() {
        return dst;
    }

    @Override
    public String getSlug() {
        if (slug == null)
            slug = TopoSlug.toString(this,false);
        return slug;
    }

    public String getShortSlug() {
        if (shortSlug == null)
            shortSlug = TopoSlug.toString(this,true);
        return shortSlug;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Link)) return false;

        Link link = (Link) o;

        if (src != null ? !src.equals(link.src) : link.src != null) return false;
        return dst != null ? dst.equals(link.dst) : link.dst == null;
    }

    @Override
    public int hashCode() {
        int result = src != null ? src.hashCode() : 0;
        result = 31 * result + (dst != null ? dst.hashCode() : 0);
        return result;
    }

    public static void main(String[] args) {
        LinkEndpoint ep1 = new LinkEndpoint(null,null, null);
        LinkEndpoint ep2 = new LinkEndpoint(null,null, null);
        Link link1 = new Link(ep1,ep2);
        System.out.println("link1.getSlug() = " + link1.getSlug());
    }
}