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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.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.index.FieldInfo.IndexOptions;
import org.apache.lucene.index.Term;
import org.apache.lucene.queries.TermFilter;
import org.apache.lucene.queries.TermsFilter;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.Query;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.lucene.BytesRefs;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.codec.postingsformat.PostingsFormatProvider;
import org.elasticsearch.index.fielddata.FieldDataType;
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.ArrayList;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.index.mapper.MapperBuilders.parent;
/**
*
*/
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 FieldType FIELD_TYPE = new FieldType(AbstractFieldMapper.Defaults.FIELD_TYPE);
static {
FIELD_TYPE.setIndexed(true);
FIELD_TYPE.setTokenized(false);
FIELD_TYPE.setStored(true);
FIELD_TYPE.setOmitNorms(true);
FIELD_TYPE.setIndexOptions(IndexOptions.DOCS_ONLY);
FIELD_TYPE.freeze();
}
}
public static class Builder extends Mapper.Builder {
protected String indexName;
private String type;
protected PostingsFormatProvider postingsFormat;
public Builder() {
super(Defaults.NAME);
this.indexName = name;
}
public Builder type(String type) {
this.type = type;
return builder;
}
protected Builder postingsFormat(PostingsFormatProvider postingsFormat) {
this.postingsFormat = postingsFormat;
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, postingsFormat, null, context.indexSettings());
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String name, Map node, ParserContext parserContext) throws MapperParsingException {
ParentFieldMapper.Builder builder = parent();
for (Map.Entry entry : node.entrySet()) {
String fieldName = Strings.toUnderscoreCase(entry.getKey());
Object fieldNode = entry.getValue();
if (fieldName.equals("type")) {
builder.type(fieldNode.toString());
} else if (fieldName.equals("postings_format")) {
String postingFormatName = fieldNode.toString();
builder.postingsFormat(parserContext.postingFormatService().get(postingFormatName));
}
}
return builder;
}
}
private final String type;
private final BytesRef typeAsBytes;
protected ParentFieldMapper(String name, String indexName, String type, PostingsFormatProvider postingsFormat, @Nullable Settings fieldDataSettings, Settings indexSettings) {
super(new Names(name, indexName, indexName, name), Defaults.BOOST, new FieldType(Defaults.FIELD_TYPE), null,
Lucene.KEYWORD_ANALYZER, Lucene.KEYWORD_ANALYZER, postingsFormat, null, null, null, fieldDataSettings, indexSettings);
this.type = type;
this.typeAsBytes = type == null ? null : new BytesRef(type);
}
public ParentFieldMapper() {
this(Defaults.NAME, Defaults.NAME, null, null, null, null);
}
public String type() {
return type;
}
@Override
public FieldType defaultFieldType() {
return Defaults.FIELD_TYPE;
}
@Override
public FieldDataType defaultFieldDataType() {
return new FieldDataType("string");
}
@Override
public boolean hasDocValues() {
return false;
}
@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 void parseCreateField(ParseContext context, List fields) throws IOException {
if (!active()) {
return;
}
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);
fields.add(new Field(names.indexName(), Uid.createUid(context.stringBuilder(), type, parentId), fieldType));
} else {
// 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
fields.add(new Field(names.indexName(), Uid.createUid(context.stringBuilder(), type, parentId), fieldType));
} 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...
}
@Override
public Uid value(Object value) {
if (value == null) {
return null;
}
return Uid.createUid(value.toString());
}
@Override
public Object valueForSearch(Object value) {
if (value == null) {
return null;
}
String sValue = value.toString();
if (sValue == null) {
return null;
}
int index = sValue.indexOf(Uid.DELIMITER);
if (index == -1) {
return sValue;
}
return sValue.substring(index + 1);
}
@Override
public BytesRef indexedValueForSearch(Object value) {
if (value instanceof BytesRef) {
BytesRef bytesRef = (BytesRef) value;
if (Uid.hasDelimiter(bytesRef)) {
return bytesRef;
}
return Uid.createUidAsBytes(typeAsBytes, bytesRef);
}
String sValue = value.toString();
if (sValue.indexOf(Uid.DELIMITER) == -1) {
return Uid.createUidAsBytes(type, sValue);
}
return super.indexedValueForSearch(value);
}
@Override
public Query termQuery(Object value, @Nullable QueryParseContext context) {
if (context == null) {
return super.termQuery(value, context);
}
return new ConstantScoreQuery(termFilter(value, context));
}
@Override
public Filter termFilter(Object value, @Nullable QueryParseContext context) {
if (context == null) {
return super.termFilter(value, context);
}
BytesRef bValue = BytesRefs.toBytesRef(value);
if (Uid.hasDelimiter(bValue)) {
return new TermFilter(new Term(names.indexName(), bValue));
}
List types = new ArrayList(context.mapperService().types().size());
for (DocumentMapper documentMapper : context.mapperService()) {
if (!documentMapper.parentFieldMapper().active()) {
types.add(documentMapper.type());
}
}
if (types.isEmpty()) {
return Queries.MATCH_NO_FILTER;
} else if (types.size() == 1) {
return new TermFilter(new Term(names.indexName(), Uid.createUidAsBytes(types.get(0), bValue)));
} else {
// we use all non child types, cause we don't know if its exact or not...
List typesValues = new ArrayList(types.size());
for (String type : context.mapperService().types()) {
typesValues.add(Uid.createUidAsBytes(type, bValue));
}
return new TermsFilter(names.indexName(), typesValues);
}
}
@Override
public Filter termsFilter(List values, @Nullable QueryParseContext context) {
if (context == null) {
return super.termsFilter(values, context);
}
// This will not be invoked if values is empty, so don't check for empty
if (values.size() == 1) {
return termFilter(values.get(0), context);
}
List types = new ArrayList(context.mapperService().types().size());
for (DocumentMapper documentMapper : context.mapperService()) {
if (!documentMapper.parentFieldMapper().active()) {
types.add(documentMapper.type());
}
}
List bValues = new ArrayList(values.size());
for (Object value : values) {
BytesRef bValue = BytesRefs.toBytesRef(value);
if (Uid.hasDelimiter(bValue)) {
bValues.add(bValue);
} else {
// we use all non child types, cause we don't know if its exact or not...
for (String type : types) {
bValues.add(Uid.createUidAsBytes(type, bValue));
}
}
}
return new TermsFilter(names.indexName(), bValues);
}
/**
* We don't need to analyzer the text, and we need to convert it to UID...
*/
@Override
public boolean useTermQueryWithQueryString() {
return true;
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (!active()) {
return builder;
}
builder.startObject(CONTENT_TYPE);
builder.field("type", type);
builder.endObject();
return builder;
}
@Override
public void merge(Mapper mergeWith, MergeContext mergeContext) throws MergeMappingException {
ParentFieldMapper other = (ParentFieldMapper) mergeWith;
if (active() == other.active()) {
return;
}
if (active() != other.active() || !type.equals(other.type)) {
mergeContext.addConflict("The _parent field can't be added or updated");
}
}
/**
* @return Whether the _parent field is actually used.
*/
public boolean active() {
return type != null;
}
}
