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Add a new all meta field that keyword fields use for inverted index i…
…f all field is enabled.
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167 changes: 167 additions & 0 deletions
167
server/src/main/java/org/elasticsearch/index/mapper/AllFieldMapper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.elasticsearch.index.mapper; | ||
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| import org.apache.lucene.document.FieldType; | ||
| import org.apache.lucene.index.DocValuesType; | ||
| import org.apache.lucene.index.IndexOptions; | ||
| import org.apache.lucene.index.IndexableField; | ||
| import org.apache.lucene.search.Query; | ||
| import org.apache.lucene.util.BytesRef; | ||
| import org.apache.lucene.util.BytesRefBuilder; | ||
| import org.elasticsearch.common.lucene.Lucene; | ||
| import org.elasticsearch.index.query.SearchExecutionContext; | ||
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| import java.io.IOException; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
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| import static org.apache.lucene.index.IndexWriter.MAX_TERM_LENGTH; | ||
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| public class AllFieldMapper extends MetadataFieldMapper { | ||
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| static final byte FIELD_VALUE_SEPARATOR = 0; // nul code point | ||
| public static final String NAME = "_all"; | ||
| public static final AllFieldMapper ENABLED_INSTANCE = new AllFieldMapper(true); | ||
| private static final AllFieldMapper DISABLED_INSTANCE = new AllFieldMapper(false); | ||
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| private final boolean enabled; | ||
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| public static class Defaults { | ||
| public static final FieldType FIELD_TYPE; | ||
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| static { | ||
| FieldType ft = new FieldType(); | ||
| ft.setTokenized(false); | ||
| ft.setOmitNorms(true); | ||
| ft.setIndexOptions(IndexOptions.DOCS); | ||
| ft.setDocValuesType(DocValuesType.NONE); | ||
| ft.setStored(false); | ||
| FIELD_TYPE = freezeAndDeduplicateFieldType(ft); | ||
| } | ||
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| public static TextSearchInfo TEXT_SEARCH_INFO = new TextSearchInfo( | ||
| FIELD_TYPE, | ||
| null, | ||
| Lucene.KEYWORD_ANALYZER, | ||
| Lucene.KEYWORD_ANALYZER | ||
| ); | ||
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| } | ||
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| public static class Builder extends MetadataFieldMapper.Builder { | ||
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| private final Parameter<Boolean> enabled; | ||
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| public Builder() { | ||
| super(NAME); | ||
| this.enabled = Parameter.boolParam("enabled", true, m -> toType(m).enabled, false) | ||
| .setMergeValidator((previous, current, conflicts) -> previous == current); | ||
| } | ||
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| @Override | ||
| protected Parameter<?>[] getParameters() { | ||
| return new Parameter<?>[] { enabled }; | ||
| } | ||
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| @Override | ||
| public MetadataFieldMapper build() { | ||
| return enabled.getValue() ? ENABLED_INSTANCE : DISABLED_INSTANCE; | ||
| } | ||
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| private static AllFieldMapper toType(FieldMapper in) { | ||
| return (AllFieldMapper) in; | ||
| } | ||
| } | ||
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| public static final class AllFieldType extends MappedFieldType { | ||
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| static final AllFieldType INSTANCE = new AllFieldType(); | ||
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| private AllFieldType() { | ||
| super(NAME, true, false, false, Defaults.TEXT_SEARCH_INFO, Collections.emptyMap()); | ||
| } | ||
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| @Override | ||
| public String typeName() { | ||
| return NAME; | ||
| } | ||
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| @Override | ||
| public Query termQuery(Object value, SearchExecutionContext context) { | ||
| throw new IllegalArgumentException("Field [" + name() + "] of type [" + typeName() + "] does not support term queries"); | ||
| } | ||
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| @Override | ||
| public Query existsQuery(SearchExecutionContext context) { | ||
| throw new IllegalArgumentException("Field [" + name() + "] of type [" + typeName() + "] does not support exists queries"); | ||
| } | ||
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| @Override | ||
| public ValueFetcher valueFetcher(SearchExecutionContext context, String format) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| } | ||
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| public static final TypeParser PARSER = new ConfigurableTypeParser(c -> DISABLED_INSTANCE, c -> new AllFieldMapper.Builder()); | ||
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| private AllFieldMapper(boolean enabled) { | ||
| super(AllFieldType.INSTANCE); | ||
| this.enabled = enabled; | ||
| } | ||
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| public boolean isEnabled() { | ||
| return enabled; | ||
| } | ||
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| @Override | ||
| public FieldMapper.Builder getMergeBuilder() { | ||
| return new Builder().init(this); | ||
| } | ||
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| @Override | ||
| public void postParse(DocumentParserContext context) throws IOException { | ||
| if (enabled == false) { | ||
| // not configured, so skip the validation | ||
| return; | ||
| } | ||
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| final List<IndexableField> fields = context.rootDoc().getFields(); | ||
| for (int i = 0; i < fields.size(); i++) { | ||
| IndexableField indexableField = fields.get(i); | ||
| var mappedFieldType = context.mappingLookup().getFieldType(indexableField.name()); | ||
| if (mappedFieldType != null && "keyword".equals(mappedFieldType.typeName())) { | ||
| BytesRef value = toAllFieldTerm(indexableField.binaryValue(), new BytesRef(indexableField.name())); | ||
| if (value.length > MAX_TERM_LENGTH) { | ||
| // TODO | ||
| } | ||
| context.doc().add(new KeywordFieldMapper.KeywordField(NAME, value, Defaults.FIELD_TYPE)); | ||
| } | ||
| } | ||
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| } | ||
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| public static BytesRef toAllFieldTerm(BytesRef fieldValueBytes, BytesRef fieldNameBytes) { | ||
| BytesRefBuilder builder = new BytesRefBuilder(); | ||
| builder.append(fieldValueBytes); | ||
| builder.append(FIELD_VALUE_SEPARATOR); | ||
| builder.append(fieldNameBytes); | ||
| return builder.toBytesRef(); | ||
| } | ||
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| @Override | ||
| protected String contentType() { | ||
| return NAME; | ||
| } | ||
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| @Override | ||
| public SourceLoader.SyntheticFieldLoader syntheticFieldLoader() { | ||
| return SourceLoader.SyntheticFieldLoader.NOTHING; | ||
| } | ||
| } |
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