/*
* Copyright 2014 Red Hat, Inc. and/or its affiliates.
*
* 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.core.impl.domain.variable.custom;
import java.io.Serializable;
import org.optaplanner.core.impl.domain.variable.inverserelation.SingletonInverseVariableSupply;
import org.optaplanner.core.impl.domain.variable.supply.Demand;
import org.optaplanner.core.impl.score.director.InnerScoreDirector;
/**
* Unlike other {@link Demand}s, a custom demand isn't equalized based on its sources, but based on its target.
* Therefore a custom shadow variable cannot be reused by built-in systems.
*/
public class CustomShadowVariableDemand implements Demand<SingletonInverseVariableSupply>, Serializable {
private static final int CLASS_NAME_HASH_CODE = CustomShadowVariableDemand.class.getName().hashCode() * 37;
private final CustomShadowVariableDescriptor targetShadowVariableDescriptor;
public CustomShadowVariableDemand(CustomShadowVariableDescriptor targetShadowVariableDescriptor) {
this.targetShadowVariableDescriptor = targetShadowVariableDescriptor;
}
// ************************************************************************
// Creation method
// ************************************************************************
@Override
public SingletonInverseVariableSupply createExternalizedSupply(InnerScoreDirector scoreDirector) {
throw new IllegalArgumentException("A custom shadow variable cannot be externalized.");
}
// ************************************************************************
// Equals/hashCode method
// ************************************************************************
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof CustomShadowVariableDemand)) {
return false;
}
CustomShadowVariableDemand other = (CustomShadowVariableDemand) o;
return targetShadowVariableDescriptor == other.targetShadowVariableDescriptor;
}
@Override
public int hashCode() {
return CLASS_NAME_HASH_CODE + targetShadowVariableDescriptor.hashCode();
}
@Override
public String toString() {
return getClass().getSimpleName();
}
}