Github user dsmiley commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/410#discussion_r197862734
--- Diff:
solr/core/src/java/org/apache/solr/update/processor/DeeplyNestedUpdateProcessor.java
---
@@ -0,0 +1,101 @@
+/*
+ * 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.io.IOException;
+import java.util.Collection;
+import java.util.EnumSet;
+import java.util.Locale;
+import java.util.Objects;
+
+import org.apache.solr.common.SolrInputDocument;
+import org.apache.solr.common.SolrInputField;
+import org.apache.solr.request.SolrQueryRequest;
+import org.apache.solr.response.SolrQueryResponse;
+import org.apache.solr.schema.IndexSchema;
+import org.apache.solr.update.AddUpdateCommand;
+import static
org.apache.solr.update.processor.DeeplyNestedUpdateProcessorFactory.NestedFlag;
+
+public class DeeplyNestedUpdateProcessor extends UpdateRequestProcessor {
+ private EnumSet<NestedFlag> fields;
+ SolrQueryRequest req;
+
+
+ protected DeeplyNestedUpdateProcessor(SolrQueryRequest req,
SolrQueryResponse rsp, EnumSet<NestedFlag> fields, UpdateRequestProcessor next)
{
+ super(next);
+ this.req = req;
+ this.fields = fields;
+ }
+
+ @Override
+ public void processAdd(AddUpdateCommand cmd) throws IOException {
+ SolrInputDocument doc = cmd.getSolrInputDocument();
+ processDocChildren(doc, null);
+ super.processAdd(cmd);
+ }
+
+ private void processDocChildren(SolrInputDocument doc, String fullPath) {
+ for(SolrInputField field: doc.values()) {
+ if(field.getFirstValue() instanceof SolrInputDocument) {
+ Object val = field.getValue();
+ fullPath = Objects.isNull(fullPath) ? field.getName():
String.format(Locale.ROOT,"%s.%s", fullPath, field.getName());
+ if (val instanceof Collection) {
+ for(Object childDoc: (Collection) val) {
+ if(childDoc instanceof SolrInputDocument) {
+ processChildDoc((SolrInputDocument) childDoc, doc, fullPath);
+ }
+ }
+ } else {
+ processChildDoc((SolrInputDocument) val, doc, fullPath);
+ }
+ }
+ }
+ }
+
+ private void processChildDoc(SolrInputDocument sdoc, SolrInputDocument
parent, String fullPath) {
+ if(fields == NestedFlag.ALL) {
+ setPathField(sdoc, fullPath);
+ setParentKey(sdoc, parent);
+ setLevelKey(sdoc, fullPath);
+ } else {
+ if(fields.contains(NestedFlag.PATH)) {
+ setPathField(sdoc, fullPath);
+ }
+ if (fields.contains(NestedFlag.PARENT)) {
+ setParentKey(sdoc, parent);
+ }
+ if(fields.contains(NestedFlag.LEVEL)) {
+ setLevelKey(sdoc, fullPath);
+ }
+ }
+ processDocChildren(sdoc, fullPath);
+ }
+
+ private void setLevelKey(SolrInputDocument sdoc, String fullPath) {
+ sdoc.addField(IndexSchema.LEVEL_FIELD_NAME,
fullPath.split("\\.").length);
--- End diff --
yuck; sorry. Perhaps instead of pre-concatenating the full path, we
instead pass full path around as a List<String> to the various arguments and
then we only materialize it in setPathField? This may also ameliorate the
O(N^2) problem although we would be re-concatenating the earlier part of the
string but that doesn't seem like a big deal.
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