apache / solr - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 25,606 units with 283,280 lines of code in units (66.2% of code).

13 very complex units (3,652 lines of code)
105 complex units (14,825 lines of code)
778 medium complex units (48,415 lines of code)
1,810 simple units (56,235 lines of code)
22,900 very simple units (160,153 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Unit	# lines	McCabe index	# params
private int jjMoveNfa_3() in solr/core/src/java/org/apache/solr/parser/QueryParserTokenManager.java	675	302	2
public void open() in solr/solrj-streaming/src/java/org/apache/solr/client/solrj/io/stream/ZplotStream.java	248	66	0
private static NamedList getCountsSingleValue() in solr/core/src/java/org/apache/solr/request/NumericFacets.java	251	66	8
IndexFetchResult fetchLatestIndex() in solr/core/src/java/org/apache/solr/handler/IndexFetcher.java	309	65	2
public void process() in solr/core/src/java/org/apache/solr/handler/component/TermsComponent.java	185	59	1
public void process() in solr/core/src/java/org/apache/solr/handler/component/ExpandComponent.java	272	58	1
public FacetStream() in solr/solrj-streaming/src/java/org/apache/solr/client/solrj/io/stream/FacetStream.java	232	57	2
public ParseResult parse() in solr/core/src/java/org/apache/solr/schema/SimplePreAnalyzedParser.java	206	56	2
protected void mergeIds() in solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java	262	55	2
public boolean split() in solr/core/src/java/org/apache/solr/cloud/api/collections/SplitShardCmd.java	552	55	3
public static void processParams() in solr/core/src/java/org/apache/solr/request/json/RequestUtil.java	168	54	5
protected NamedList requestWithRetryOnStaleState() in solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrClient.java	161	54	3
public List splitIntoClauses() in solr/core/src/java/org/apache/solr/search/ExtendedDismaxQParser.java	131	53	2
private int jjMoveNfa_1() in solr/core/src/java/org/apache/solr/parser/QueryParserTokenManager.java	138	50	2
private int next() in solr/solrj/src/java/org/noggit/JSONParser.java	130	48	1
def run() in dev-tools/scripts/releaseWizard.py	116	48	1
public RefCounted getSearcher() in solr/core/src/java/org/apache/solr/core/SolrCore.java	190	47	4
public DocSet getDocSetEnumerate() in solr/core/src/java/org/apache/solr/search/JoinQuery.java	188	46	0
public void process() in solr/core/src/java/org/apache/solr/handler/component/RealTimeGetComponent.java	210	45	1
public static NamedList getCounts() in solr/core/src/java/org/apache/solr/request/DocValuesFacets.java	163	45	11
public final void doSyncOrReplicateRecovery() in solr/core/src/java/org/apache/solr/cloud/RecoveryStrategy.java	200	44	1
public void getColStatus() in solr/core/src/java/org/apache/solr/handler/admin/ColStatus.java	164	42	1
SimpleOrderedMap findTopSlots() in solr/core/src/java/org/apache/solr/search/facet/FacetFieldProcessor.java	155	42	3
public void call() in solr/core/src/java/org/apache/solr/cloud/api/collections/ReindexCollectionCmd.java	375	42	3
public NamedList getFacetTermEnumCounts() in solr/core/src/java/org/apache/solr/request/SimpleFacets.java	142	42	11
public void inform() in solr/core/src/java/org/apache/solr/handler/ReplicationHandler.java	116	41	1
public void run() in solr/core/src/java/org/apache/solr/cloud/OverseerTaskProcessor.java	176	41	0
public int nextEvent() in solr/solrj/src/java/org/noggit/JSONParser.java	105	41	0
private void processComponents() in solr/core/src/java/org/apache/solr/handler/component/SearchHandler.java	181	40	5
private void add() in solr/core/src/java/org/apache/solr/search/SolrReturnFields.java	168	40	4
public void process() in solr/core/src/java/org/apache/solr/search/grouping/distributed/responseprocessor/TopGroupsShardResponseProcessor.java	155	40	2
protected NamedList executeMethod() in solr/solrj/src/java/org/apache/solr/client/solrj/impl/HttpSolrClient.java	173	40	4
public Object doWork() in solr/solrj-streaming/src/java/org/apache/solr/client/solrj/io/eval/PredictEvaluator.java	137	39	1
boolean pollAndProcessRequests() in solr/cross-dc-manager/src/java/org/apache/solr/crossdc/manager/consumer/KafkaCrossDcConsumer.java	152	39	0
private QueryResult getDocListC() in solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java	127	39	2
public Map getRefinement() in solr/core/src/java/org/apache/solr/search/facet/FacetRequestSortedMerger.java	84	39	1
public void writeResponse() in solr/core/src/java/org/apache/solr/response/CSVResponseWriter.java	176	38	0
public void call() in solr/core/src/java/org/apache/solr/cloud/api/collections/CreateCollectionCmd.java	291	38	3
protected void uninvert() in solr/core/src/java/org/apache/solr/uninverting/DocTermOrds.java	165	38	3
public void doReplay() in solr/core/src/java/org/apache/solr/update/UpdateLog.java	179	37	1
private NamedList getTermCounts() in solr/core/src/java/org/apache/solr/request/SimpleFacets.java	212	37	3
private long readNumber() in solr/solrj/src/java/org/noggit/JSONParser.java	79	37	2
protected SolrInputDocument readDoc() in solr/core/src/java/org/apache/solr/handler/loader/XMLLoader.java	144	36	2
public void process() in solr/core/src/java/org/apache/solr/handler/component/TermVectorComponent.java	138	36	1
private static String getFieldFlags() in solr/core/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java	41	36	1
public Collection convert() in solr/core/src/java/org/apache/solr/spelling/SpellingQueryConverter.java	69	36	1
private void handleObjectStart() in solr/solrj/src/java/org/apache/solr/common/util/JsonRecordReader.java	122	36	6
protected Map getZkStatus() in solr/core/src/java/org/apache/solr/handler/admin/ZookeeperStatusHandler.java	158	35	2
public ProcessedFilter getProcessedFilter() in solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java	100	35	1
void runLeaderProcess() in solr/core/src/java/org/apache/solr/cloud/ShardLeaderElectionContext.java	204	35	2

Unit

# lines

McCabe index

# params

private int jjMoveNfa_3()
in solr/core/src/java/org/apache/solr/parser/QueryParserTokenManager.java

675

302

public void open()
in solr/solrj-streaming/src/java/org/apache/solr/client/solrj/io/stream/ZplotStream.java

248

private static NamedList getCountsSingleValue()
in solr/core/src/java/org/apache/solr/request/NumericFacets.java

251

IndexFetchResult fetchLatestIndex()
in solr/core/src/java/org/apache/solr/handler/IndexFetcher.java