/*
* 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.score.trend;
import java.io.Serializable;
import org.optaplanner.core.api.domain.solution.PlanningSolution;
import org.optaplanner.core.api.score.Score;
import org.optaplanner.core.config.score.trend.InitializingScoreTrendLevel;
/**
* Bounds the possible {@link Score}s for a {@link PlanningSolution} as more and more variables are initialized
* (while the already initialized variables don't change).
* @see InitializingScoreTrendLevel
*/
public class InitializingScoreTrend implements Serializable {
public static InitializingScoreTrend parseTrend(String initializingScoreTrendString, int levelsSize) {
String[] trendTokens = initializingScoreTrendString.split("/");
boolean tokenIsSingle = trendTokens.length == 1;
if (!tokenIsSingle && trendTokens.length != levelsSize) {
throw new IllegalArgumentException("The initializingScoreTrendString (" + initializingScoreTrendString
+ ") doesn't follow the correct pattern (" + buildTrendPattern(levelsSize) + "):"
+ " the trendTokens length (" + trendTokens.length
+ ") differs from the levelsSize (" + levelsSize + ").");
}
InitializingScoreTrendLevel[] trendLevels = new InitializingScoreTrendLevel[levelsSize];
for (int i = 0; i < levelsSize; i++) {
trendLevels[i] = InitializingScoreTrendLevel.valueOf(trendTokens[tokenIsSingle ? 0 : i]);
}
return new InitializingScoreTrend(trendLevels);
}
public static InitializingScoreTrend buildUniformTrend(InitializingScoreTrendLevel trendLevel, int levelsSize) {
InitializingScoreTrendLevel[] trendLevels = new InitializingScoreTrendLevel[levelsSize];
for (int i = 0; i < levelsSize; i++) {
trendLevels[i] = trendLevel;
}
return new InitializingScoreTrend(trendLevels);
}
protected static String buildTrendPattern(int levelsSize) {
StringBuilder trendPattern = new StringBuilder(levelsSize * 4);
boolean first = true;
for (int i = 0; i < levelsSize; i++) {
if (first) {
first = false;
} else {
trendPattern.append("/");
}
trendPattern.append(InitializingScoreTrendLevel.ANY.name());
}
return trendPattern.toString();
}
// ************************************************************************
// Fields, constructions, getters and setters
// ************************************************************************
private final InitializingScoreTrendLevel[] trendLevels;
public InitializingScoreTrend(InitializingScoreTrendLevel[] trendLevels) {
this.trendLevels = trendLevels;
}
public InitializingScoreTrendLevel[] getTrendLevels() {
return trendLevels;
}
// ************************************************************************
// Complex methods
// ************************************************************************
public int getLevelsSize() {
return trendLevels.length;
}
public boolean isOnlyUp() {
for (InitializingScoreTrendLevel trendLevel : trendLevels) {
if (trendLevel != InitializingScoreTrendLevel.ONLY_UP) {
return false;
}
}
return true;
}
public boolean isOnlyDown() {
for (InitializingScoreTrendLevel trendLevel : trendLevels) {
if (trendLevel != InitializingScoreTrendLevel.ONLY_DOWN) {
return false;
}
}
return true;
}
}