| /* |
| * 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.hyracks.storage.am.lsm.common.impls; |
| |
| import java.io.Serializable; |
| |
| import org.apache.hyracks.storage.am.lsm.common.api.ILSMComponentId; |
| |
| import com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| |
| public class LSMComponentId implements ILSMComponentId, Serializable { |
| |
| public static final long NOT_FOUND = -1; |
| public static final long MIN_VALID_COMPONENT_ID = 0; |
| |
| // Used to represent an empty index with no components |
| public static final LSMComponentId EMPTY_INDEX_LAST_COMPONENT_ID = new LSMComponentId(NOT_FOUND, NOT_FOUND); |
| private static final long serialVersionUID = 7421441042232168639L; |
| |
| // A default component id used for bulk loaded component |
| public static final LSMComponentId DEFAULT_COMPONENT_ID = |
| new LSMComponentId(MIN_VALID_COMPONENT_ID, MIN_VALID_COMPONENT_ID); |
| |
| private long minId; |
| |
| private long maxId; |
| |
| @JsonCreator |
| public LSMComponentId(@JsonProperty("minId") long minId, @JsonProperty("maxId") long maxId) { |
| assert minId <= maxId; |
| this.minId = minId; |
| this.maxId = maxId; |
| } |
| |
| public void reset(long minId, long maxId) { |
| this.minId = minId; |
| this.maxId = maxId; |
| } |
| |
| @Override |
| public long getMinId() { |
| return this.minId; |
| } |
| |
| @Override |
| public long getMaxId() { |
| return this.maxId; |
| } |
| |
| @Override |
| public boolean missing() { |
| return minId == NOT_FOUND || maxId == NOT_FOUND; |
| } |
| |
| @Override |
| public String toString() { |
| return "[" + minId + "," + maxId + "]"; |
| } |
| |
| @Override |
| public int hashCode() { |
| return 31 * Long.hashCode(minId) + Long.hashCode(maxId); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (!(obj instanceof LSMComponentId)) { |
| return false; |
| } |
| LSMComponentId other = (LSMComponentId) obj; |
| return maxId == other.maxId && minId == other.minId; |
| } |
| |
| @Override |
| public IdCompareResult compareTo(ILSMComponentId id) { |
| if (this.missing() || id == null || id.missing()) { |
| return IdCompareResult.UNKNOWN; |
| } |
| LSMComponentId componentId = (LSMComponentId) id; |
| if (this.getMinId() > componentId.getMaxId()) { |
| return IdCompareResult.GREATER_THAN; |
| } else if (this.getMaxId() < componentId.getMinId()) { |
| return IdCompareResult.LESS_THAN; |
| } else if (this.getMinId() <= componentId.getMinId() && this.getMaxId() >= componentId.getMaxId()) { |
| return IdCompareResult.INCLUDE; |
| } else { |
| return IdCompareResult.INTERSECT; |
| } |
| } |
| |
| } |