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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.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexOptions;
import org.elasticsearch.common.Strings;
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 java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeBooleanValue;
/**
*
*/
public class RoutingFieldMapper extends MetadataFieldMapper {
public static final String NAME = "_routing";
public static final String CONTENT_TYPE = "_routing";
public static class Defaults {
public static final String NAME = "_routing";
public static final MappedFieldType FIELD_TYPE = new RoutingFieldType();
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();
}
public static final boolean REQUIRED = false;
}
public static class Builder extends MetadataFieldMapper.Builder<Builder, RoutingFieldMapper> {
private boolean required = Defaults.REQUIRED;
public Builder(MappedFieldType existing) {
super(Defaults.NAME, existing == null ? Defaults.FIELD_TYPE : existing, Defaults.FIELD_TYPE);
}
public Builder required(boolean required) {
this.required = required;
return builder;
}
@Override
public RoutingFieldMapper build(BuilderContext context) {
return new RoutingFieldMapper(fieldType, required, context.indexSettings());
}
}
public static class TypeParser implements MetadataFieldMapper.TypeParser {
@Override
public MetadataFieldMapper.Builder parse(String name, Map<String, Object> node, ParserContext parserContext) throws MapperParsingException {
Builder builder = new Builder(parserContext.mapperService().fullName(NAME));
for (Iterator<Map.Entry<String, Object>> iterator = node.entrySet().iterator(); iterator.hasNext();) {
Map.Entry<String, Object> entry = iterator.next();
String fieldName = Strings.toUnderscoreCase(entry.getKey());
Object fieldNode = entry.getValue();
if (fieldName.equals("required")) {
builder.required(nodeBooleanValue(fieldNode));
iterator.remove();
}
}
return builder;
}
@Override
public MetadataFieldMapper getDefault(Settings indexSettings, MappedFieldType fieldType, String typeName) {
return new RoutingFieldMapper(indexSettings, fieldType);
}
}
static final class RoutingFieldType extends MappedFieldType {
public RoutingFieldType() {
setFieldDataType(new FieldDataType("string"));
}
protected RoutingFieldType(RoutingFieldType ref) {
super(ref);
}
@Override
public MappedFieldType clone() {
return new RoutingFieldType(this);
}
@Override
public String typeName() {
return CONTENT_TYPE;
}
@Override
public String value(Object value) {
if (value == null) {
return null;
}
return value.toString();
}
}
private boolean required;
private RoutingFieldMapper(Settings indexSettings, MappedFieldType existing) {
this(existing == null ? Defaults.FIELD_TYPE.clone() : existing.clone(), Defaults.REQUIRED, indexSettings);
}
private RoutingFieldMapper(MappedFieldType fieldType, boolean required, Settings indexSettings) {
super(NAME, fieldType, Defaults.FIELD_TYPE, indexSettings);
this.required = required;
}
public void markAsRequired() {
this.required = true;
}
public boolean required() {
return this.required;
}
public String value(Document document) {
Field field = (Field) document.getField(fieldType().name());
return field == null ? null : (String)fieldType().value(field);
}
@Override
public void preParse(ParseContext context) throws IOException {
super.parse(context);
}
@Override
public void postParse(ParseContext context) throws IOException {
}
@Override
public Mapper parse(ParseContext context) throws IOException {
// no need ot parse here, we either get the routing in the sourceToParse
// or we don't have routing, if we get it in sourceToParse, we process it in preParse
// which will always be called
return null;
}
@Override
protected void parseCreateField(ParseContext context, List<Field> fields) throws IOException {
if (context.sourceToParse().routing() != null) {
String routing = context.sourceToParse().routing();
if (routing != null) {
if (fieldType().indexOptions() != IndexOptions.NONE || fieldType().stored()) {
fields.add(new Field(fieldType().name(), routing, fieldType()));
}
}
}
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
boolean includeDefaults = params.paramAsBoolean("include_defaults", false);
// if all are defaults, no sense to write it at all
if (!includeDefaults && required == Defaults.REQUIRED) {
return builder;
}
builder.startObject(CONTENT_TYPE);
if (includeDefaults || required != Defaults.REQUIRED) {
builder.field("required", required);
}
builder.endObject();
return builder;
}
@Override
protected void doMerge(Mapper mergeWith, boolean updateAllTypes) {
// do nothing here, no merging, but also no exception
}
}
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