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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.schema.derived;
import com.yahoo.schema.document.RankType;
import java.util.Collections;
import java.util.Map;
/**
* A set of rank type definitions used for native rank features.
*
* @author geirst
*/
public class NativeRankTypeDefinitionSet {
/** The name of this rank definition set */
private String name;
/** The unmodifiable rank type implementations in this set */
private final Map<RankType, NativeRankTypeDefinition> typeDefinitions;
/** Returns the default rank type (about) */
public static RankType getDefaultRankType() { return RankType.ABOUT; }
public NativeRankTypeDefinitionSet(String name) {
this.name = name;
Map<RankType, NativeRankTypeDefinition> typeDefinitions = new java.util.LinkedHashMap<>();
typeDefinitions.put(RankType.IDENTITY, createIdentityRankType(RankType.IDENTITY));
typeDefinitions.put(RankType.ABOUT, createAboutRankType(RankType.ABOUT));
typeDefinitions.put(RankType.TAGS, createTagsRankType(RankType.TAGS));
typeDefinitions.put(RankType.EMPTY, createEmptyRankType(RankType.EMPTY));
this.typeDefinitions = Collections.unmodifiableMap(typeDefinitions);
}
private NativeRankTypeDefinition createEmptyRankType(RankType type) {
NativeRankTypeDefinition rank = new NativeRankTypeDefinition(type);
rank.addTable(new NativeTable(NativeTable.Type.FIRST_OCCURRENCE, "linear(0,0)"));
rank.addTable(new NativeTable(NativeTable.Type.OCCURRENCE_COUNT, "linear(0,0)"));
rank.addTable(new NativeTable(NativeTable.Type.PROXIMITY, "linear(0,0)"));
rank.addTable(new NativeTable(NativeTable.Type.REVERSE_PROXIMITY, "linear(0,0)"));
rank.addTable(new NativeTable(NativeTable.Type.WEIGHT, "linear(0,0)"));
return rank;
}
private NativeRankTypeDefinition createAboutRankType(RankType type) {
NativeRankTypeDefinition rank = new NativeRankTypeDefinition(type);
rank.addTable(new NativeTable(NativeTable.Type.FIRST_OCCURRENCE, "expdecay(8000,12.50)"));
rank.addTable(new NativeTable(NativeTable.Type.OCCURRENCE_COUNT, "loggrowth(1500,4000,19)"));
rank.addTable(new NativeTable(NativeTable.Type.PROXIMITY, "expdecay(500,3)"));
rank.addTable(new NativeTable(NativeTable.Type.REVERSE_PROXIMITY, "expdecay(400,3)"));
rank.addTable(new NativeTable(NativeTable.Type.WEIGHT, "linear(1,0)"));
return rank;
}
private NativeRankTypeDefinition createIdentityRankType(RankType type) {
NativeRankTypeDefinition rank = new NativeRankTypeDefinition(type);
rank.addTable(new NativeTable(NativeTable.Type.FIRST_OCCURRENCE, "expdecay(100,12.50)"));
rank.addTable(new NativeTable(NativeTable.Type.OCCURRENCE_COUNT, "loggrowth(1500,4000,19)"));
rank.addTable(new NativeTable(NativeTable.Type.PROXIMITY, "expdecay(5000,3)"));
rank.addTable(new NativeTable(NativeTable.Type.REVERSE_PROXIMITY, "expdecay(3000,3)"));
rank.addTable(new NativeTable(NativeTable.Type.WEIGHT, "linear(1,0)"));
return rank;
}
private NativeRankTypeDefinition createTagsRankType(RankType type) {
NativeRankTypeDefinition rank = new NativeRankTypeDefinition(type);
rank.addTable(new NativeTable(NativeTable.Type.FIRST_OCCURRENCE, "expdecay(8000,12.50)"));
rank.addTable(new NativeTable(NativeTable.Type.OCCURRENCE_COUNT, "loggrowth(1500,4000,19)"));
rank.addTable(new NativeTable(NativeTable.Type.PROXIMITY, "expdecay(500,3)"));
rank.addTable(new NativeTable(NativeTable.Type.REVERSE_PROXIMITY, "expdecay(400,3)"));
rank.addTable(new NativeTable(NativeTable.Type.WEIGHT, "loggrowth(38,50,1)"));
return rank;
}
/**
* Returns a rank type definition if given an existing rank type name,
* or null if given a rank type which has no native implementation (meaning somebody forgot to add it),
*/
public NativeRankTypeDefinition getRankTypeDefinition(RankType type) {
if (type == RankType.DEFAULT)
type = getDefaultRankType();
return typeDefinitions.get(type);
}
/** Returns an unmodifiable map of the type definitions in this */
public Map<RankType, NativeRankTypeDefinition> types() { return typeDefinitions; }
public String toString() {
return "native rank type definitions " + name;
}
}
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