org.apache.flink.table.planner.plan.nodes.exec.spec.PartitionSpec Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.table.planner.plan.nodes.exec.spec;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonIgnore;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;
import java.util.Arrays;
import static org.apache.flink.util.Preconditions.checkNotNull;
/** {@link PartitionSpec} describes how data is partitioned in Rank. */
public class PartitionSpec {
public static final String FIELD_NAME_FIELDS = "fields";
/** PartitionSpec makes all data in one partition. */
public static final PartitionSpec ALL_IN_ONE = new PartitionSpec(new int[0]);
/** 0-based index of field used in partitioning. */
@JsonProperty(FIELD_NAME_FIELDS)
private final int[] fields;
@JsonCreator
public PartitionSpec(@JsonProperty(FIELD_NAME_FIELDS) int[] fields) {
this.fields = checkNotNull(fields);
}
/** Gets field index of all fields in input. */
@JsonIgnore
public int[] getFieldIndices() {
return fields;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
PartitionSpec that = (PartitionSpec) o;
return Arrays.equals(fields, that.fields);
}
@Override
public int hashCode() {
return Arrays.hashCode(fields);
}
@Override
public String toString() {
return "Partition{" + "fields=" + Arrays.toString(fields) + '}';
}
}