org.elasticsearch.script.AbstractSortScript Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.script;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.Scorable;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.lucene.ScorerAware;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.search.lookup.LeafSearchLookup;
import org.elasticsearch.search.lookup.SearchLookup;
import org.elasticsearch.search.lookup.SourceLookup;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
abstract class AbstractSortScript implements ScorerAware {
private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(DynamicMap.class);
private static final Map> PARAMS_FUNCTIONS = org.elasticsearch.common.collect.Map.of(
"doc", value -> {
deprecationLogger.deprecate("sort-script_doc",
"Accessing variable [doc] via [params.doc] from within an sort-script "
+ "is deprecated in favor of directly accessing [doc].");
return value;
},
"_doc", value -> {
deprecationLogger.deprecate("sort-script__doc",
"Accessing variable [doc] via [params._doc] from within an sort-script "
+ "is deprecated in favor of directly accessing [doc].");
return value;
},
"_source", value -> ((SourceLookup)value).loadSourceIfNeeded()
);
/**
* The generic runtime parameters for the script.
*/
private final Map params;
/** A scorer that will return the score for the current document when the script is run. */
private Scorable scorer;
/**
* A leaf lookup for the bound segment this script will operate on.
*/
private final LeafSearchLookup leafLookup;
AbstractSortScript(Map params, SearchLookup lookup, LeafReaderContext leafContext) {
this.leafLookup = lookup.getLeafSearchLookup(leafContext);
Map parameters = new HashMap<>(params);
parameters.putAll(leafLookup.asMap());
this.params = new DynamicMap(parameters, PARAMS_FUNCTIONS);
}
protected AbstractSortScript() {
this.params = null;
this.leafLookup = null;
}
/**
* Return the parameters for this script.
*/
public Map getParams() {
return params;
}
@Override
public void setScorer(Scorable scorer) {
this.scorer = scorer;
}
/** Return the score of the current document. */
public double get_score() {
try {
return scorer.score();
} catch (IOException e) {
throw new ElasticsearchException("couldn't lookup score", e);
}
}
/**
* The doc lookup for the Lucene segment this script was created for.
*/
public Map> getDoc() {
return leafLookup.doc();
}
/**
* Set the current document to run the script on next.
*/
public void setDocument(int docid) {
leafLookup.setDocument(docid);
}
}