/*
* 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.query;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import org.apache.lucene.queries.TermsFilter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class IdsFilterParser implements FilterParser {
public static final String NAME = "ids";
@Inject
public IdsFilterParser() {
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
List<BytesRef> ids = new ArrayList<>();
Collection<String> types = null;
String filterName = null;
String currentFieldName = null;
XContentParser.Token token;
boolean idsProvided = false;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
if ("values".equals(currentFieldName)) {
idsProvided = true;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
BytesRef value = parser.utf8BytesOrNull();
if (value == null) {
throw new QueryParsingException(parseContext.index(), "No value specified for term filter");
}
ids.add(value);
}
} else if ("types".equals(currentFieldName) || "type".equals(currentFieldName)) {
types = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
String value = parser.textOrNull();
if (value == null) {
throw new QueryParsingException(parseContext.index(), "No type specified for term filter");
}
types.add(value);
}
} else {
throw new QueryParsingException(parseContext.index(), "[ids] filter does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("type".equals(currentFieldName) || "_type".equals(currentFieldName)) {
types = ImmutableList.of(parser.text());
} else if ("_name".equals(currentFieldName)) {
filterName = parser.text();
} else {
throw new QueryParsingException(parseContext.index(), "[ids] filter does not support [" + currentFieldName + "]");
}
}
}
if (!idsProvided) {
throw new QueryParsingException(parseContext.index(), "[ids] filter requires providing a values element");
}
if (ids.isEmpty()) {
return Queries.MATCH_NO_FILTER;
}
if (types == null || types.isEmpty()) {
types = parseContext.queryTypes();
} else if (types.size() == 1 && Iterables.getFirst(types, null).equals("_all")) {
types = parseContext.mapperService().types();
}
TermsFilter filter = new TermsFilter(UidFieldMapper.NAME, Uid.createTypeUids(types, ids));
if (filterName != null) {
parseContext.addNamedFilter(filterName, filter);
}
return filter;
}
}