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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.externalvalues;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.StringField;
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.core.BooleanFieldMapper;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
public class ExternalMetadataMapper extends MetadataFieldMapper {
static final String CONTENT_TYPE = "_external_root";
static final String FIELD_NAME = "_is_external";
static final String FIELD_VALUE = "true";
private static MappedFieldType FIELD_TYPE = new BooleanFieldMapper.BooleanFieldType();
static {
FIELD_TYPE.setNames(new MappedFieldType.Names(FIELD_NAME));
FIELD_TYPE.freeze();
}
protected ExternalMetadataMapper(Settings indexSettings) {
super(FIELD_NAME, FIELD_TYPE, FIELD_TYPE, indexSettings);
}
@Override
public String name() {
return CONTENT_TYPE;
}
@Override
protected void parseCreateField(ParseContext context, List<Field> fields) throws IOException {
// handled in post parse
}
@Override
public void doMerge(Mapper mergeWith, boolean updateAllTypes) {
if (!(mergeWith instanceof ExternalMetadataMapper)) {
throw new IllegalArgumentException("Trying to merge " + mergeWith + " with " + this);
}
}
@Override
public Iterator<Mapper> iterator() {
return Collections.emptyIterator();
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
return builder.startObject(CONTENT_TYPE).endObject();
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public void preParse(ParseContext context) throws IOException {
}
@Override
public void postParse(ParseContext context) throws IOException {
context.doc().add(new StringField(FIELD_NAME, FIELD_VALUE, Store.YES));
}
public static class Builder extends MetadataFieldMapper.Builder<Builder, ExternalMetadataMapper> {
protected Builder() {
super(CONTENT_TYPE, FIELD_TYPE, FIELD_TYPE);
}
@Override
public ExternalMetadataMapper build(BuilderContext context) {
return new ExternalMetadataMapper(context.indexSettings());
}
}
public static class TypeParser implements MetadataFieldMapper.TypeParser {
@Override
public MetadataFieldMapper.Builder<?, ?> parse(String name, Map<String, Object> node, ParserContext parserContext) throws MapperParsingException {
return new Builder();
}
@Override
public MetadataFieldMapper getDefault(Settings indexSettings, MappedFieldType fieldType, String typeName) {
return new ExternalMetadataMapper(indexSettings);
}
}
}
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