ijokarumawak commented on a change in pull request #3375: NIFI-5979 : enhanced
ReplaceText processor with "Number of Occurrences" and "Occurrence offset"
configurations
URL: https://github.com/apache/nifi/pull/3375#discussion_r270273958
##########
File path:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ReplaceText.java
##########
@@ -586,52 +672,76 @@ public void process(final InputStream in, final
OutputStream out) throws IOExcep
try (final LineDemarcator demarcator = new
LineDemarcator(in, charset, maxBufferSize, 8192);
final BufferedWriter bw = new BufferedWriter(new
OutputStreamWriter(out, charset))) {
- String oneLine;
- final StringBuffer sb = new StringBuffer();
+// final StringBuffer sb = new StringBuffer();
Matcher matcher = null;
-
- while (null != (oneLine = demarcator.nextLine())) {
- additionalAttrs.clear();
- if (matcher == null) {
- matcher = searchPattern.matcher(oneLine);
+ String precedingLine = demarcator.nextLine();
+ String succeedingLine;
+ boolean firstLine = true;
+ while (null != (succeedingLine =
demarcator.nextLine())) {
+ if(firstLine &&
evaluateMode.equalsIgnoreCase(FIRST_LINE)){
+ replaceRegexInLine(bw, precedingLine,
matcher, searchPattern, context, flowFile);
+ firstLine = false;
+ } else if(firstLine &&
evaluateMode.equalsIgnoreCase(EXCEPT_FIRST_LINE)) {
+ firstLine = false;
+ bw.write(precedingLine);
+ } else
if(evaluateMode.equalsIgnoreCase(LINE_BY_LINE)
+ ||
evaluateMode.equalsIgnoreCase(EXCEPT_LAST_LINE)
+ || (!firstLine &&
evaluateMode.equalsIgnoreCase(EXCEPT_FIRST_LINE))) {
+ replaceRegexInLine(bw, precedingLine,
matcher, searchPattern, context, flowFile);
} else {
- matcher.reset(oneLine);
+ bw.write(precedingLine);
}
+ precedingLine = succeedingLine;
+ }
- int matches = 0;
- sb.setLength(0);
+ if
(evaluateMode.equalsIgnoreCase(EXCEPT_LAST_LINE) || (!firstLine &&
evaluateMode.equalsIgnoreCase(FIRST_LINE))) {
+ bw.write(precedingLine);
+ } else {
+ replaceRegexInLine(bw, precedingLine, matcher,
searchPattern, context, flowFile);
+ }
+ }
+ }
+ });
+ }
- while (matcher.find()) {
- matches++;
+ return updatedFlowFile;
+ }
- for (int i=0; i <= matcher.groupCount();
i++) {
- additionalAttrs.put("$" + i,
matcher.group(i));
- }
+ private void replaceRegexInLine(BufferedWriter bw, String oneLine,
/*StringBuffer sb,*/ Matcher matcher, Pattern searchPattern, ProcessContext
context, FlowFile flowFile) throws IOException {
Review comment:
Please remove the commented sb argument `/*StringBuffer sb,*/` if it's not
used anymore.
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