| /* |
| * 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.druid.query; |
| |
| import com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import org.apache.druid.guice.annotations.PublicApi; |
| import org.joda.time.DateTime; |
| |
| import javax.annotation.Nullable; |
| import java.util.Comparator; |
| import java.util.Objects; |
| import java.util.function.Function; |
| |
| /** |
| */ |
| @PublicApi |
| public class Result<T> implements Comparable<Result<T>> |
| { |
| private final DateTime timestamp; |
| private final T value; |
| |
| @JsonCreator |
| public Result(@JsonProperty("timestamp") @Nullable DateTime timestamp, @JsonProperty("result") T value) |
| { |
| this.timestamp = timestamp; |
| this.value = value; |
| } |
| |
| public <U> Result<U> map(Function<? super T, ? extends U> mapper) |
| { |
| return new Result<>(timestamp, mapper.apply(value)); |
| } |
| |
| @Override |
| public int compareTo(Result<T> tResult) |
| { |
| // timestamp is null for grandTotal which should come last. |
| return Comparator.nullsLast(DateTime::compareTo).compare(this.timestamp, tResult.timestamp); |
| } |
| |
| @JsonProperty |
| @Nullable |
| public DateTime getTimestamp() |
| { |
| return timestamp; |
| } |
| |
| @JsonProperty("result") |
| public T getValue() |
| { |
| return value; |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| Result result = (Result) o; |
| |
| if (timestamp != null && result.timestamp != null) { |
| if (!timestamp.isEqual(result.timestamp) |
| && timestamp.getZone().getOffset(timestamp) == result.timestamp.getZone().getOffset(result.timestamp)) { |
| return false; |
| } |
| } else if (timestamp == null ^ result.timestamp == null) { |
| return false; |
| } |
| |
| return Objects.equals(value, result.value); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hash(timestamp, value); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "Result{" + |
| "timestamp=" + timestamp + |
| ", value=" + value + |
| '}'; |
| } |
| } |