Github user dsmiley commented on a diff in the pull request: https://github.com/apache/lucene-solr/pull/410#discussion_r197866818 --- Diff: solr/core/src/java/org/apache/solr/update/processor/DeeplyNestedUpdateProcessorFactory.java --- @@ -0,0 +1,74 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF 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.apache.solr.update.processor; + +import java.util.EnumSet; +import java.util.List; +import java.util.Locale; +import java.util.stream.Collectors; + +import org.apache.solr.common.SolrException; +import org.apache.commons.lang3.StringUtils; +import org.apache.solr.common.util.NamedList; +import org.apache.solr.common.util.StrUtils; +import org.apache.solr.request.SolrQueryRequest; +import org.apache.solr.response.SolrQueryResponse; + +import static org.apache.solr.common.SolrException.ErrorCode.SERVER_ERROR; + +public class DeeplyNestedUpdateProcessorFactory extends UpdateRequestProcessorFactory { + + private EnumSet<NestedFlag> fields; + private static final List<String> allowedConfFields = NestedFlag.ALL.stream().map(e -> e.toString().toLowerCase(Locale.ROOT)).collect(Collectors.toList()); + + public UpdateRequestProcessor getInstance(SolrQueryRequest req, SolrQueryResponse rsp, UpdateRequestProcessor next ) { + return new DeeplyNestedUpdateProcessor(req, rsp, fields, next); + } + + @Override + public void init( NamedList args ) + { + Object tmp = args.remove("fields"); + if (null == tmp) { + throw new SolrException(SERVER_ERROR, + "'versionField' must be configured"); + } + if (! (tmp instanceof String) ) { + throw new SolrException(SERVER_ERROR, + "'versionField' must be configured as a <str>"); + } + List<String> fields = StrUtils.splitSmart((String)tmp, ','); + if(!allowedConfFields.containsAll(fields)) { + throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Deeply Nested URP may only contain: " + StringUtils.join(allowedConfFields, ", ") + + " got: " + StringUtils.join(fields, ", ") + " instead"); + } + this.fields = fields.size() == NestedFlag.values().length ? NestedFlag.ALL: generateNestedFlags(fields); + } + + private static EnumSet<NestedFlag> generateNestedFlags(List<String> fields) { + return EnumSet.copyOf(fields.stream().map(e -> NestedFlag.valueOf(e.toUpperCase(Locale.ROOT))).collect(Collectors.toList())); + } + + public enum NestedFlag { + PATH, + PARENT, + LEVEL; + + public static final EnumSet<NestedFlag> ALL = EnumSet.allOf(NestedFlag.class); --- End diff -- Nice
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