org.elasticsearch.search.rescore.QueryRescoreMode Maven / Gradle / Ivy
/*
* 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.rescore;
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 QueryRescoreMode implements Writeable {
Avg {
@Override
public float combine(float primary, float secondary) {
return (primary + secondary) / 2;
}
@Override
public String toString() {
return "avg";
}
},
Max {
@Override
public float combine(float primary, float secondary) {
return Math.max(primary, secondary);
}
@Override
public String toString() {
return "max";
}
},
Min {
@Override
public float combine(float primary, float secondary) {
return Math.min(primary, secondary);
}
@Override
public String toString() {
return "min";
}
},
Total {
@Override
public float combine(float primary, float secondary) {
return primary + secondary;
}
@Override
public String toString() {
return "sum";
}
},
Multiply {
@Override
public float combine(float primary, float secondary) {
return primary * secondary;
}
@Override
public String toString() {
return "product";
}
};
public abstract float combine(float primary, float secondary);
public static QueryRescoreMode readFromStream(StreamInput in) throws IOException {
return in.readEnum(QueryRescoreMode.class);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeEnum(this);
}
public static QueryRescoreMode fromString(String scoreMode) {
for (QueryRescoreMode mode : values()) {
if (scoreMode.toLowerCase(Locale.ROOT).equals(mode.name().toLowerCase(Locale.ROOT))) {
return mode;
}
}
throw new IllegalArgumentException("illegal score_mode [" + scoreMode + "]");
}
@Override
public String toString() {
return name().toLowerCase(Locale.ROOT);
}
}