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Mapper: An analyzer mapper allowing to control the index analyzer of …
…a document based on a document field, closes elastic#485.
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112 changes: 112 additions & 0 deletions
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...s/elasticsearch/src/main/java/org/elasticsearch/index/mapper/xcontent/AnalyzerMapper.java
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| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * Licensed to Elastic Search and Shay Banon under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Elastic Search 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:https://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 | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
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| package org.elasticsearch.index.mapper.xcontent; | ||
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| import org.apache.lucene.analysis.Analyzer; | ||
| import org.elasticsearch.common.xcontent.XContentBuilder; | ||
| import org.elasticsearch.index.mapper.FieldMapperListener; | ||
| import org.elasticsearch.index.mapper.MapperParsingException; | ||
| import org.elasticsearch.index.mapper.MergeMappingException; | ||
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| import java.io.IOException; | ||
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| /** | ||
| * @author kimchy (shay.banon) | ||
| */ | ||
| public class AnalyzerMapper implements XContentMapper { | ||
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| public static final String CONTENT_TYPE = "_analyzer"; | ||
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| public static class Builder extends XContentMapper.Builder<Builder, AnalyzerMapper> { | ||
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| private String field = null; | ||
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| public Builder() { | ||
| super(CONTENT_TYPE); | ||
| this.builder = this; | ||
| } | ||
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| public Builder field(String field) { | ||
| this.field = field; | ||
| return this; | ||
| } | ||
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| @Override public AnalyzerMapper build(BuilderContext context) { | ||
| return new AnalyzerMapper(field); | ||
| } | ||
| } | ||
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| // for now, it is parsed directly in the document parser, need to move this internal types parsing to be done here as well... | ||
| // public static class TypeParser implements XContentMapper.TypeParser { | ||
| // @Override public XContentMapper.Builder parse(String name, Map<String, Object> node, ParserContext parserContext) throws MapperParsingException { | ||
| // AnalyzerMapper.Builder builder = analyzer(); | ||
| // for (Map.Entry<String, Object> entry : node.entrySet()) { | ||
| // String fieldName = Strings.toUnderscoreCase(entry.getKey()); | ||
| // Object fieldNode = entry.getValue(); | ||
| // if ("field".equals(fieldName)) { | ||
| // builder.field(fieldNode.toString()); | ||
| // } | ||
| // } | ||
| // return builder; | ||
| // } | ||
| // } | ||
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| private final String field; | ||
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| public AnalyzerMapper(String field) { | ||
| this.field = field; | ||
| } | ||
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| @Override public String name() { | ||
| return CONTENT_TYPE; | ||
| } | ||
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| @Override public void parse(ParseContext context) throws IOException { | ||
| Analyzer analyzer = context.docMapper().mappers().indexAnalyzer(); | ||
| if (field != null) { | ||
| String value = context.doc().get(field); | ||
| if (value != null) { | ||
| analyzer = context.analysisService().analyzer(value); | ||
| if (analyzer == null) { | ||
| throw new MapperParsingException("No analyzer found for [" + value + "] from field [" + field + "]"); | ||
| } | ||
| analyzer = context.docMapper().mappers().indexAnalyzer(analyzer); | ||
| } | ||
| } | ||
| context.analyzer(analyzer); | ||
| } | ||
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| @Override public void merge(XContentMapper mergeWith, MergeContext mergeContext) throws MergeMappingException { | ||
| } | ||
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| @Override public void traverse(FieldMapperListener fieldMapperListener) { | ||
| } | ||
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| @Override public void toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| if (field == null) { | ||
| return; | ||
| } | ||
| builder.startObject(CONTENT_TYPE); | ||
| if (field != null) { | ||
| builder.field("field", field); | ||
| } | ||
| builder.endObject(); | ||
| } | ||
| } |
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