org.elasticsearch.index.query.HasParentFilterParser Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon 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.query;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.Query;
import org.elasticsearch.ElasticSearchIllegalStateException;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.search.NotFilter;
import org.elasticsearch.common.lucene.search.XBooleanFilter;
import org.elasticsearch.common.lucene.search.XConstantScoreQuery;
import org.elasticsearch.common.lucene.search.XFilteredQuery;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.cache.filter.support.CacheKeyFilter;
import org.elasticsearch.index.mapper.DocumentMapper;
import org.elasticsearch.index.mapper.internal.ParentFieldMapper;
import org.elasticsearch.index.search.child.HasParentFilter;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
/**
*
*/
public class HasParentFilterParser implements FilterParser {
public static final String NAME = "has_parent";
@Inject
public HasParentFilterParser() {
}
@Override
public String[] names() {
return new String[]{NAME, Strings.toCamelCase(NAME)};
}
@Override
public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
Query query = null;
boolean queryFound = false;
String parentType = null;
boolean cache = false;
CacheKeyFilter.Key cacheKey = null;
String filterName = null;
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("query".equals(currentFieldName)) {
// TODO handle `query` element before `type` element...
String[] origTypes = QueryParseContext.setTypesWithPrevious(parentType == null ? null : new String[]{parentType});
try {
query = parseContext.parseInnerQuery();
queryFound = true;
} finally {
QueryParseContext.setTypes(origTypes);
}
} else if ("filter".equals(currentFieldName)) {
// TODO handle `filter` element before `type` element...
String[] origTypes = QueryParseContext.setTypesWithPrevious(parentType == null ? null : new String[]{parentType});
try {
Filter innerFilter = parseContext.parseInnerFilter();
query = new XConstantScoreQuery(innerFilter);
queryFound = true;
} finally {
QueryParseContext.setTypes(origTypes);
}
} else {
throw new QueryParsingException(parseContext.index(), "[has_parent] filter does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("type".equals(currentFieldName) || "parent_type".equals(currentFieldName) || "parentType".equals(currentFieldName)) {
parentType = parser.text();
} else if ("_scope".equals(currentFieldName)) {
throw new QueryParsingException(parseContext.index(), "the [_scope] support in [has_parent] filter has been removed, use a filter as a facet_filter in the relevant global facet");
} else if ("_name".equals(currentFieldName)) {
filterName = parser.text();
} else if ("_cache".equals(currentFieldName)) {
cache = parser.booleanValue();
} else if ("_cache_key".equals(currentFieldName) || "_cacheKey".equals(currentFieldName)) {
cacheKey = new CacheKeyFilter.Key(parser.text());
} else {
throw new QueryParsingException(parseContext.index(), "[has_parent] filter does not support [" + currentFieldName + "]");
}
}
}
if (!queryFound) {
throw new QueryParsingException(parseContext.index(), "[has_parent] filter requires 'query' field");
}
if (query == null) {
return null;
}
if (parentType == null) {
throw new QueryParsingException(parseContext.index(), "[has_parent] filter requires 'parent_type' field");
}
DocumentMapper parentDocMapper = parseContext.mapperService().documentMapper(parentType);
if (parentDocMapper == null) {
throw new QueryParsingException(parseContext.index(), "[has_parent] filter configured 'parent_type' [" + parentType + "] is not a valid type");
}
// wrap the query with type query
query = new XFilteredQuery(query, parseContext.cacheFilter(parentDocMapper.typeFilter(), null));
SearchContext searchContext = SearchContext.current();
// In case of delete by query api
if (searchContext == null) {
throw new ElasticSearchIllegalStateException("[has_parent] Can't execute, search context not set");
}
Set parentTypes = new HashSet(5);
parentTypes.add(parentType);
for (DocumentMapper documentMapper : parseContext.mapperService()) {
ParentFieldMapper parentFieldMapper = documentMapper.parentFieldMapper();
if (parentFieldMapper != null) {
DocumentMapper parentTypeDocumentMapper = searchContext.mapperService().documentMapper(parentFieldMapper.type());
if (parentTypeDocumentMapper == null) {
// Only add this, if this parentFieldMapper (also a parent) isn't a child of another parent.
parentTypes.add(parentFieldMapper.type());
}
}
}
Filter parentFilter;
if (parentTypes.size() == 1) {
DocumentMapper documentMapper = parseContext.mapperService().documentMapper(parentTypes.iterator().next());
parentFilter = parseContext.cacheFilter(documentMapper.typeFilter(), null);
} else {
XBooleanFilter parentsFilter = new XBooleanFilter();
for (String parentTypeStr : parentTypes) {
DocumentMapper documentMapper = parseContext.mapperService().documentMapper(parentTypeStr);
Filter filter = parseContext.cacheFilter(documentMapper.typeFilter(), null);
parentsFilter.add(filter, BooleanClause.Occur.SHOULD);
}
parentFilter = parentsFilter;
}
Filter childrenFilter = parseContext.cacheFilter(new NotFilter(parentFilter), null);
HasParentFilter hasParentFilter = new HasParentFilter(query, parentType, searchContext, childrenFilter);
searchContext.addRewrite(hasParentFilter);
Filter filter = hasParentFilter;
if (cache) {
filter = parseContext.cacheFilter(filter, cacheKey);
}
if (filterName != null) {
parseContext.addNamedFilter(filterName, filter);
}
return filter;
}
}