org.optaplanner.examples.common.business.ProblemFileComparator Maven / Gradle / Ivy
/*
* Copyright 2015 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.examples.common.business;
import java.io.File;
import java.io.Serializable;
import java.util.Comparator;
public class ProblemFileComparator implements Comparator, Serializable {
private static final AlphaNumericStringComparator ALPHA_NUMERIC_STRING_COMPARATOR = new AlphaNumericStringComparator();
private static final Comparator COMPARATOR = Comparator.comparing(File::getParent, ALPHA_NUMERIC_STRING_COMPARATOR)
.thenComparing(File::isDirectory)
.thenComparing(f -> !f.getName().toLowerCase().startsWith("demo"))
.thenComparing(f -> f.getName().toLowerCase(), ALPHA_NUMERIC_STRING_COMPARATOR)
.thenComparing(File::getName);
@Override
public int compare(File a, File b) {
return COMPARATOR.compare(a, b);
}
}