| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.tinkerpop.gremlin.process.traversal.step; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.lambda.IdentityTraversal; |
| import org.javatuples.Pair; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public interface ComparatorHolder<S, C extends Comparable> { |
| |
| /** |
| * Add a {@link Traversal}-based {@link Comparator} to the holder. |
| * If no traversal is needed, use {@link IdentityTraversal}. |
| * |
| * @param traversal the traversal to pre-process the object by. |
| * @param comparator the comparator to compare the result of the object after traversal processing |
| */ |
| public void addComparator(final Traversal.Admin<S, C> traversal, final Comparator<C> comparator); |
| |
| /** |
| * Get the comparators associated with this holder. |
| * The comparators are ordered according to their oder of operation. |
| * |
| * @return a list of {@link Traversal}/{@link Comparator}-pairs |
| */ |
| public List<Pair<Traversal.Admin<S, C>, Comparator<C>>> getComparators(); |
| |
| } |