org.elasticsearch.search.aggregations.bucket.composite.MissingOrder Maven / Gradle / Ivy
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.bucket.composite;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import java.io.IOException;
import java.util.Locale;
public enum MissingOrder implements Writeable {
/**
* Place buckets for missing values first if the source uses ASC ordering or last otherwise.
*/
DEFAULT {
@Override
public int compareAnyValueToMissing(int reverseMul) {
return reverseMul;
}
@Override
public String toString() {
return "default";
}
},
/**
* Place buckets for missing values first.
*/
FIRST {
@Override
public int compareAnyValueToMissing(int reverseMul) {
return 1;
}
@Override
public String toString() {
return "first";
}
},
/**
* Place buckets for missing values last.
*/
LAST {
@Override
public int compareAnyValueToMissing(int reverseMul) {
return -1;
}
@Override
public String toString() {
return "last";
}
};
public abstract int compareAnyValueToMissing(int reverseMul);
public static MissingOrder readFromStream(StreamInput in) throws IOException {
return in.readEnum(MissingOrder.class);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeEnum(this);
}
public static MissingOrder fromString(String op) {
return valueOf(op.toUpperCase(Locale.ROOT));
}
}