/*
* Copyright 2013 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.api.domain.valuerange;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.util.Collection;
import org.optaplanner.core.api.domain.variable.PlanningVariable;
import org.optaplanner.core.api.solver.SolverFactory;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
/**
* Provides the planning values that can be used for a {@link PlanningVariable}.
* <p>
* This is specified on a getter of a java bean property (or directly on a field)
* which returns a {@link Collection} or {@link ValueRange}.
* A {@link Collection} is implicitly converted to a {@link ValueRange}.
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface ValueRangeProvider {
/**
* Used by {@link PlanningVariable#valueRangeProviderRefs()}
* to map a {@link PlanningVariable} to a {@link ValueRangeProvider}.
* @return never null, must be unique across a {@link SolverFactory}
*/
String id();
}