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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