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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
* "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.
*/
package org.elasticsearch.index.mapper.internal;
import org.apache.lucene.document.BinaryDocValuesField;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexOptions;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.index.Term;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.Version;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.Mapper;
import org.elasticsearch.index.mapper.MapperParsingException;
import org.elasticsearch.index.mapper.MetadataFieldMapper;
import org.elasticsearch.index.mapper.ParseContext;
import org.elasticsearch.index.mapper.ParseContext.Document;
import org.elasticsearch.index.mapper.Uid;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseField;
/**
*
*/
public class UidFieldMapper extends MetadataFieldMapper {
public static final String NAME = "_uid";
public static final String CONTENT_TYPE = "_uid";
public static class Defaults {
public static final String NAME = UidFieldMapper.NAME;
public static final MappedFieldType FIELD_TYPE = new UidFieldType();
public static final MappedFieldType NESTED_FIELD_TYPE;
static {
FIELD_TYPE.setIndexOptions(IndexOptions.DOCS);
FIELD_TYPE.setTokenized(false);
FIELD_TYPE.setStored(true);
FIELD_TYPE.setOmitNorms(true);
FIELD_TYPE.setIndexAnalyzer(Lucene.KEYWORD_ANALYZER);
FIELD_TYPE.setSearchAnalyzer(Lucene.KEYWORD_ANALYZER);
FIELD_TYPE.setName(NAME);
FIELD_TYPE.freeze();
NESTED_FIELD_TYPE = FIELD_TYPE.clone();
NESTED_FIELD_TYPE.setStored(false);
NESTED_FIELD_TYPE.freeze();
}
}
public static class Builder extends MetadataFieldMapper.Builder<Builder, UidFieldMapper> {
public Builder(MappedFieldType existing) {
super(Defaults.NAME, existing == null ? Defaults.FIELD_TYPE : existing, Defaults.FIELD_TYPE);
indexName = Defaults.NAME;
}
@Override
public UidFieldMapper build(BuilderContext context) {
setupFieldType(context);
return new UidFieldMapper(fieldType, defaultFieldType, context.indexSettings());
}
}
public static class TypeParser implements MetadataFieldMapper.TypeParser {
@Override
public MetadataFieldMapper.Builder<?, ?> parse(String name, Map<String, Object> node, ParserContext parserContext) throws MapperParsingException {
throw new MapperParsingException(NAME + " is not configurable");
}
@Override
public MetadataFieldMapper getDefault(Settings indexSettings, MappedFieldType fieldType, String typeName) {
return new UidFieldMapper(indexSettings, fieldType);
}
}
static final class UidFieldType extends MappedFieldType {
public UidFieldType() {
setFieldDataType(new FieldDataType("string"));
}
protected UidFieldType(UidFieldType ref) {
super(ref);
}
@Override
public MappedFieldType clone() {
return new UidFieldType(this);
}
@Override
public String typeName() {
return CONTENT_TYPE;
}
@Override
public Uid value(Object value) {
if (value == null) {
return null;
}
return Uid.createUid(value.toString());
}
}
private UidFieldMapper(Settings indexSettings, MappedFieldType existing) {
this(existing == null ? Defaults.FIELD_TYPE.clone() : existing, Defaults.FIELD_TYPE, indexSettings);
}
private UidFieldMapper(MappedFieldType fieldType, MappedFieldType defaultFieldType, Settings indexSettings) {
super(NAME, fieldType, defaultFieldType, indexSettings);
}
@Override
public void preParse(ParseContext context) throws IOException {
// if we have the id provided, fill it, and parse now
if (context.sourceToParse().id() != null) {
context.id(context.sourceToParse().id());
super.parse(context);
}
}
@Override
public void postParse(ParseContext context) throws IOException {
if (context.id() == null && !context.sourceToParse().flyweight()) {
throw new MapperParsingException("No id found while parsing the content source");
}
// if we did not have the id as part of the sourceToParse, then we need to parse it here
// it would have been filled in the _id parse phase
if (context.sourceToParse().id() == null) {
super.parse(context);
// since we did not have the uid in the pre phase, we did not add it automatically to the nested docs
// as they were created we need to make sure we add it to all the nested docs...
if (context.docs().size() > 1) {
final IndexableField uidField = context.rootDoc().getField(UidFieldMapper.NAME);
assert uidField != null;
// we need to go over the docs and add it...
for (int i = 1; i < context.docs().size(); i++) {
final Document doc = context.docs().get(i);
doc.add(new Field(UidFieldMapper.NAME, uidField.stringValue(), Defaults.NESTED_FIELD_TYPE));
}
}
}
}
@Override
public Mapper parse(ParseContext context) throws IOException {
// nothing to do here, we either do it in post parse, or in pre parse.
return null;
}
@Override
protected void parseCreateField(ParseContext context, List<Field> fields) throws IOException {
Field uid = new Field(NAME, Uid.createUid(context.stringBuilder(), context.type(), context.id()), Defaults.FIELD_TYPE);
context.uid(uid);
fields.add(uid);
if (fieldType().hasDocValues()) {
fields.add(new BinaryDocValuesField(NAME, new BytesRef(uid.stringValue())));
}
}
public Term term(String uid) {
return new Term(fieldType().name(), fieldType().indexedValueForSearch(uid));
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
return builder;
}
@Override
protected void doMerge(Mapper mergeWith, boolean updateAllTypes) {
// do nothing here, no merging, but also no exception
}
}
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