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/*
* 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://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.Field;
import org.apache.lucene.document.Fieldable;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.PublicTermsFilter;
import org.apache.lucene.search.Query;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.mapper.*;
import org.elasticsearch.index.mapper.core.AbstractFieldMapper;
import org.elasticsearch.index.query.QueryParseContext;
import java.io.IOException;
import java.util.Map;
/**
*
*/
public class ParentFieldMapper extends AbstractFieldMapper implements InternalMapper, RootMapper {
public static final String NAME = "_parent";
public static final String CONTENT_TYPE = "_parent";
public static class Defaults extends AbstractFieldMapper.Defaults {
public static final String NAME = ParentFieldMapper.NAME;
public static final Field.Index INDEX = Field.Index.NOT_ANALYZED;
public static final boolean OMIT_NORMS = true;
public static final boolean OMIT_TERM_FREQ_AND_POSITIONS = true;
}
public static class Builder extends Mapper.Builder {
protected String indexName;
private String type;
public Builder() {
super(Defaults.NAME);
this.indexName = name;
}
public Builder type(String type) {
this.type = type;
return builder;
}
@Override
public ParentFieldMapper build(BuilderContext context) {
if (type == null) {
throw new MapperParsingException("Parent mapping must contain the parent type");
}
return new ParentFieldMapper(name, indexName, type);
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String name, Map node, ParserContext parserContext) throws MapperParsingException {
ParentFieldMapper.Builder builder = new ParentFieldMapper.Builder();
for (Map.Entry entry : node.entrySet()) {
String fieldName = Strings.toUnderscoreCase(entry.getKey());
Object fieldNode = entry.getValue();
if (fieldName.equals("type")) {
builder.type(fieldNode.toString());
}
}
return builder;
}
}
private final String type;
protected ParentFieldMapper(String name, String indexName, String type) {
super(new Names(name, indexName, indexName, name), Defaults.INDEX, Field.Store.YES, Defaults.TERM_VECTOR, Defaults.BOOST,
Defaults.OMIT_NORMS, Defaults.OMIT_TERM_FREQ_AND_POSITIONS, Lucene.KEYWORD_ANALYZER, Lucene.KEYWORD_ANALYZER);
this.type = type;
}
public String type() {
return type;
}
@Override
public void preParse(ParseContext context) throws IOException {
}
@Override
public void postParse(ParseContext context) throws IOException {
parse(context);
}
@Override
public void validate(ParseContext context) throws MapperParsingException {
}
@Override
public boolean includeInObject() {
return true;
}
@Override
protected Field parseCreateField(ParseContext context) throws IOException {
if (context.parser().currentName() != null && context.parser().currentName().equals(Defaults.NAME)) {
// we are in the parsing of _parent phase
String parentId = context.parser().text();
context.sourceToParse().parent(parentId);
return new Field(names.indexName(), Uid.createUid(context.stringBuilder(), type, parentId), store, index);
}
// otherwise, we are running it post processing of the xcontent
String parsedParentId = context.doc().get(Defaults.NAME);
if (context.sourceToParse().parent() != null) {
String parentId = context.sourceToParse().parent();
if (parsedParentId == null) {
if (parentId == null) {
throw new MapperParsingException("No parent id provided, not within the document, and not externally");
}
// we did not add it in the parsing phase, add it now
return new Field(names.indexName(), Uid.createUid(context.stringBuilder(), type, parentId), store, index);
} else if (parentId != null && !parsedParentId.equals(Uid.createUid(context.stringBuilder(), type, parentId))) {
throw new MapperParsingException("Parent id mismatch, document value is [" + Uid.createUid(parsedParentId).id() + "], while external value is [" + parentId + "]");
}
}
// we have parent mapping, yet no value was set, ignore it...
return null;
}
@Override
public Uid value(Fieldable field) {
return Uid.createUid(field.stringValue());
}
@Override
public Uid valueFromString(String value) {
return Uid.createUid(value);
}
@Override
public String valueAsString(Fieldable field) {
return field.stringValue();
}
@Override
public Object valueForSearch(Fieldable field) {
String fieldValue = field.stringValue();
if (fieldValue == null) {
return null;
}
int index = fieldValue.indexOf(Uid.DELIMITER);
if (index == -1) {
return fieldValue;
}
return fieldValue.substring(index + 1);
}
@Override
public String indexedValue(String value) {
if (value.indexOf(Uid.DELIMITER) == -1) {
return Uid.createUid(type, value);
}
return value;
}
@Override
public Query fieldQuery(String value, @Nullable QueryParseContext context) {
if (context == null) {
return super.fieldQuery(value, context);
}
return new ConstantScoreQuery(fieldFilter(value, context));
}
@Override
public Filter fieldFilter(String value, @Nullable QueryParseContext context) {
if (context == null) {
return super.fieldFilter(value, context);
}
// we use all types, cause we don't know if its exact or not...
PublicTermsFilter filter = new PublicTermsFilter();
for (String type : context.mapperService().types()) {
filter.addTerm(names.createIndexNameTerm(Uid.createUid(type, value)));
}
return filter;
}
/**
* We don't need to analyzer the text, and we need to convert it to UID...
*/
@Override
public boolean useFieldQueryWithQueryString() {
return true;
}
public Term term(String type, String id) {
return term(Uid.createUid(type, id));
}
public Term term(String uid) {
return names().createIndexNameTerm(uid);
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(CONTENT_TYPE);
builder.field("type", type);
builder.endObject();
return builder;
}
@Override
public void merge(Mapper mergeWith, MergeContext mergeContext) throws MergeMappingException {
// do nothing here, no merging, but also no exception
}
}
