foreignkey.java

CRM源码This file describes some issues that should be implemented in future and how it should be imple

/*
 * Copyright 2006-2007 Queplix Corp.
 *
 * Licensed under the Queplix Public License, Version 1.1.1 (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.queplix.com/solutions/commercial-open-source/queplix-public-license/
 *
 * 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 com.queplix.tools.fkchecker.kernel.types;

/**
 * @author dmitry.antonov
 */
public class ForeignKey {

    private final KeyPair startPoint;
    private final KeyPair endPoint;
    private final String name;

    public ForeignKey(String name, KeyPair startPoint, KeyPair endPoint) {
        this.name = name;
        this.startPoint = startPoint;
        this.endPoint = endPoint;
    }

    public int hashCode() {
        return startPoint.hashCode() + endPoint.hashCode();
    }

    public boolean equals(Object obj) {
        if (obj instanceof ForeignKey) {
            ForeignKey fk = (ForeignKey) obj;
            return (startPoint.equals(fk.startPoint) && endPoint.equals(fk.endPoint)) ||
                   (startPoint.equals(fk.endPoint) && endPoint.equals(fk.startPoint));
        }
        else {
            return false;
        }
    }

    public String toString() {
        return "Link '" + name + "' {" + startPoint + "<->" + endPoint + "}";    
    }
}