001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.marshall.parquet;
018
019/**
020 * How to handle cyclic references when serializing to Parquet.
021 *
022 * <p>
023 * Parquet is a flat columnar format and cannot represent object identity or cycles.
024 * When the serializer encounters a cyclic reference (e.g., <c>bean.child = bean</c>),
025 * it applies this policy.
026 */
027public enum ParquetCycleHandling {
028
029   /**
030    * Throw {@link org.apache.juneau.marshall.serializer.SerializeException} when a cycle is detected.
031    */
032   THROW,
033
034   /**
035    * Serialize cyclic references as <jk>null</jk>.
036    */
037   NULL
038}