public static TraceHeader fromString()

in aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/entities/TraceHeader.java [115:155]

• 36 lines of code
• 9 McCabe index (conditional complexity)

    public static TraceHeader fromString(@Nullable String string) {
        TraceHeader traceHeader = new TraceHeader();

        if (string == null) {
            return traceHeader;
        }

        int pos = 0;
        while (pos < string.length()) {
            int delimiterIndex = string.indexOf(';', pos);
            final String part;
            if (delimiterIndex >= 0) {
                part = string.substring(pos, delimiterIndex);
                pos = delimiterIndex + 1;
            } else {
                // Last part.
                part = string.substring(pos);
                pos = string.length();
            }
            String trimmedPart = part.trim();
            int equalsIndex = trimmedPart.indexOf('=');
            if (equalsIndex < 0) {
                logger.error(MALFORMED_ERROR_MESSAGE);
                continue;
            }

            String value = trimmedPart.substring(equalsIndex + 1);

            if (trimmedPart.startsWith(ROOT_PREFIX)) {
                traceHeader.setRootTraceId(TraceID.fromString(value));
            } else if (trimmedPart.startsWith(PARENT_PREFIX)) {
                traceHeader.setParentId(value);
            } else if (trimmedPart.startsWith(SAMPLED_PREFIX)) {
                traceHeader.setSampled(SampleDecision.fromString(trimmedPart));
            } else if (!trimmedPart.startsWith(SELF_PREFIX)) {
                String key = trimmedPart.substring(0, equalsIndex);
                traceHeader.putAdditionalParam(key, value);
            }
        }
        return traceHeader;
    }