org.opensearch.search.fetch.subphase.ScriptFieldsPhase Maven / Gradle / Ivy
/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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
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/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.search.fetch.subphase;
import org.apache.lucene.index.LeafReaderContext;
import org.opensearch.common.document.DocumentField;
import org.opensearch.common.util.CollectionUtils;
import org.opensearch.script.FieldScript;
import org.opensearch.search.fetch.FetchContext;
import org.opensearch.search.fetch.FetchSubPhase;
import org.opensearch.search.fetch.FetchSubPhaseProcessor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
public final class ScriptFieldsPhase implements FetchSubPhase {
@Override
public FetchSubPhaseProcessor getProcessor(FetchContext context) {
if (context.scriptFields() == null) {
return null;
}
List scriptFields = context.scriptFields().fields();
return new FetchSubPhaseProcessor() {
FieldScript[] leafScripts = null;
@Override
public void setNextReader(LeafReaderContext readerContext) {
leafScripts = createLeafScripts(readerContext, scriptFields);
}
@Override
public void process(HitContext hitContext) {
int docId = hitContext.docId();
for (int i = 0; i < leafScripts.length; i++) {
leafScripts[i].setDocument(docId);
final Object value;
try {
value = leafScripts[i].execute();
CollectionUtils.ensureNoSelfReferences(value, "ScriptFieldsPhase leaf script " + i);
} catch (RuntimeException e) {
if (scriptFields.get(i).ignoreException()) {
continue;
}
throw e;
}
String scriptFieldName = scriptFields.get(i).name();
DocumentField hitField = hitContext.hit().field(scriptFieldName);
if (hitField == null) {
final List