| /* |
| * 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; |
| |
| /** |
| * A {@link Path} may have multiple values associated with a single label. |
| * {@link Pop} is used to determine whether the first value, last value, or |
| * all values are gathered. Note that {@link Pop#mixed} will return results |
| * as a list if there are multiple (like {@link Pop#all}) or as a singleton |
| * if only one object in the path is labeled (like {@link Pop#last}). |
| * |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public enum Pop { |
| |
| /** |
| * The first item in an ordered collection (i.e. {@code collection[0]}). |
| * |
| * @since 3.0.0-incubating |
| */ |
| first, |
| /** |
| * The last item in an ordered collection (i.e. {@code collection[collection.size()-1]}). |
| * |
| * @since 3.0.0-incubating |
| */ |
| last, |
| /** |
| * Get all the items and return them as a list. |
| * |
| * @since 3.0.0-incubating |
| */ |
| all, |
| /** |
| * Get the items as either a list (for multiple) or an object (for singles). |
| */ |
| mixed |
| } |