/*
* Copyright 2016 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.lookup;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.optaplanner.core.api.domain.lookup.PlanningId;
import org.optaplanner.core.impl.score.director.ScoreDirector;
/**
* @see PlanningId
* @see ScoreDirector#lookUpWorkingObject(Object)
*/
public class LookUpManager {
private final LookUpStrategyResolver lookUpStrategyResolver;
private Map<Object, Object> idToWorkingObjectMap;
public LookUpManager(LookUpStrategyResolver lookUpStrategyResolver) {
this.lookUpStrategyResolver = lookUpStrategyResolver;
}
public void resetWorkingObjects(Collection<Object> allFacts) {
idToWorkingObjectMap = new HashMap<>(allFacts.size());
for (Object fact : allFacts) {
addWorkingObject(fact);
}
}
public void addWorkingObject(Object workingObject) {
LookUpStrategy lookUpStrategy = lookUpStrategyResolver.determineLookUpStrategy(workingObject);
lookUpStrategy.addWorkingObject(idToWorkingObjectMap, workingObject);
}
public void removeWorkingObject(Object workingObject) {
LookUpStrategy lookUpStrategy = lookUpStrategyResolver.determineLookUpStrategy(workingObject);
lookUpStrategy.removeWorkingObject(idToWorkingObjectMap, workingObject);
}
public void clearWorkingObjects() {
idToWorkingObjectMap = null;
}
/**
* As defined by {@link ScoreDirector#lookUpWorkingObject(Object)}.
* @param externalObject sometimes null
* @return null if externalObject is null or if there is no workingObject for externalObject
* @throws IllegalArgumentException if it cannot be located or if the externalObject's class is not supported
* @throws IllegalStateException if it cannot be located
* @param <E> the object type
*/
public <E> E lookUpWorkingObject(E externalObject) {
if (externalObject == null) {
return null;
}
LookUpStrategy lookUpStrategy = lookUpStrategyResolver.determineLookUpStrategy(externalObject);
return lookUpStrategy.lookUpWorkingObject(idToWorkingObjectMap, externalObject);
}
}