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  * Copyright 2011 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.drools.planner.api.domain.entity;
Creates a difficultyWeight for a PlanningEntity. A difficultyWeight estimates how hard is to plan a certain PlanningEntity. Some algorithms benefit from planning on more difficult planning entities first or from focusing on them.
public interface PlanningEntityDifficultyWeightFactory {


solution never null, the org.drools.planner.core.solution.Solution to which the planningEntity belongs
planningEntity never null, the planningEntity to create the difficultyWeight for
never null
    Comparable createDifficultyWeight(Solution solutionObject planningEntity);
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