Java tutorial
/* * Copyright 2012 JBoss Inc * * 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.optaplanner.examples.vehiclerouting.domain.solver; import java.io.Serializable; import java.util.Comparator; import org.apache.commons.lang.builder.CompareToBuilder; import org.optaplanner.examples.vehiclerouting.domain.Customer; public class VrpCustomerDifficultyComparator implements Comparator<Customer>, Serializable { public int compare(Customer a, Customer b) { return new CompareToBuilder() // TODO experiment with (aLatitude - bLatitude) % 10 .append(a.getLocation().getLatitude(), b.getLocation().getLatitude()) .append(a.getLocation().getLongitude(), b.getLocation().getLongitude()) .append(a.getDemand(), b.getDemand()).append(a.getId(), b.getId()).toComparison(); } }