/*
 * 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.xtable.hudi.idtracking.models;

import java.util.Collections;
import java.util.List;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Value;
import lombok.extern.jackson.Jacksonized;

/**
 * Stores the field ID information for a given schema. This allows Hudi to track consistent IDs for
 * fields across commits. The lastIdUsed is the highest ID value previously used. Field IDs should
 * be monotonically increasing.
 */
@Value
@Jacksonized
@Builder
@AllArgsConstructor
public class IdTracking {

  public static IdTracking EMPTY = new IdTracking(Collections.emptyList(), 0);
  List<IdMapping> idMappings;
  int lastIdUsed;
}
