private void doAssemble()

in analysis/gc-log/src/main/java/org/eclipse/jifa/gclog/parser/AbstractPreUnifiedGCLogParser.java [749:812]
54 lines of code
20 McCabe index (conditional complexity)

        private void doAssemble() {
            if (checkNextToken(TOKEN_LINE_FULL_SENTENCE)) {
                parser.pushSentenceToParse(List.of(lastToken));
            }
            while (!endOfLine()) {
                if (checkNextToken(TOKEN_EMBEDDED_SENTENCE)) {
                    parser.pushSentenceToParse(List.of(lastToken));
                    continue;
                }

                List<GCLogToken> sentence = null;
                for (GCLogTokenType tokenType : GC_TRACETIME_BEGIN_TOKEN_TYPES) {
                    if (sentence == null && tokenType == TOKEN_GCID) {
                        // at least one of -XX:+PrintGCDateStamps and -XX:+PrintGCTimeStamps is needed, gcid can not
                        // occur at beginning
                        continue;
                    }
                    if (checkNextToken(tokenType)) {
                        if (sentence == null) {
                            sentence = new ArrayList<>();
                        }
                        sentence.add(lastToken);
                    }
                }
                if (sentence != null) {
                    parser.pushSentenceToAssemble(sentence);
                    parser.pushSentenceToParse(sentence);
                    continue;
                }

                for (GCLogTokenType tokenType : GC_TRACETIME_END_TOKEN_TYPES) {
                    if (!checkNextToken(tokenType)) {
                        continue;
                    }
                    if (sentence == null) {
                        if (tokenType == TOKEN_SAFEPOINT || tokenType == TOKEN_REFERENCE_GC) {
                            // They are always printed together with timestamp
                            sentence = parser.pollSentenceToAssemble();
                        } else {
                            // Filter out some invalid sentence. This may be useful when
                            // the log is using unsupported options
                            do {
                                sentence = parser.pollSentenceToAssemble();
                            } while (sentence != null &&
                                    sentence.get(sentence.size() - 1).getType() != TOKEN_GC_TRACETIME_TITLE);
                        }
                        if (sentence == null) {
                            break; // log is incomplete?
                        }
                    }
                    sentence.add(lastToken);
                }
                if (sentence != null) {
                    continue;
                }
                if (checkNextToken(TOKEN_COLON_SPACE)) {
                    // HACK: when we find ": " and this can not match any other token type, it is likely
                    // that we meet a concurrent problem of gclog parsing. Just swallow this token.
                    continue;
                }
                // some logs like -XX:+PrintTenuringDistribution, -XX:+PrintHeapAtGC are ignored
                break;
            }
        }