turcsanyip commented on a change in pull request #3504: NIFI-6318: Support EL
in CSV formatting properties
URL: https://github.com/apache/nifi/pull/3504#discussion_r304804019
##########
File path:
nifi-nar-bundles/nifi-extension-utils/nifi-record-utils/nifi-standard-record-utils/src/main/java/org/apache/nifi/csv/CSVUtils.java
##########
@@ -190,57 +199,88 @@ public static CSVFormat createCSVFormat(final
PropertyContext context) {
}
}
- private static char getUnescapedChar(final PropertyContext context, final
PropertyDescriptor property) {
- return
StringEscapeUtils.unescapeJava(context.getProperty(property).getValue()).charAt(0);
+ private static Character getCharUnescapedJava(final PropertyContext
context, final PropertyDescriptor property, final Map<String, String>
variables) {
+ String value =
context.getProperty(property).evaluateAttributeExpressions(variables).getValue();
+
+ if (value != null) {
+ String unescaped = unescapeJava(value);
+ if (unescaped.length() == 1) {
+ return unescaped.charAt(0);
+ }
+ }
+
+ LOG.warn("'{}' property evaluated to an invalid value: \"{}\". It must
be a single character. The property value will be skipped.",
property.getName(), value);
+ return null;
}
- private static char getChar(final PropertyContext context, final
PropertyDescriptor property) {
- return
CSVUtils.unescape(context.getProperty(property).getValue()).charAt(0);
+ private static Character getCharUnescaped(final PropertyContext context,
final PropertyDescriptor property, final Map<String, String> variables) {
+ String value =
context.getProperty(property).evaluateAttributeExpressions(variables).getValue();
+
+ if (value != null) {
+ String unescaped = unescape(value);
+ if (unescaped.length() == 1) {
+ return unescaped.charAt(0);
+ }
+ }
+
+ LOG.warn("'{}' property evaluated to an invalid value: \"{}\". It must
be a single character. The property value will be skipped.",
property.getName(), value);
+ return null;
}
- private static CSVFormat buildCustomFormat(final PropertyContext context) {
- final char valueSeparator = getUnescapedChar(context, VALUE_SEPARATOR);
- CSVFormat format = CSVFormat.newFormat(valueSeparator)
+ private static CSVFormat buildCustomFormat(final PropertyContext context,
final Map<String, String> variables) {
+ final Character valueSeparator = getCharUnescapedJava(context,
VALUE_SEPARATOR, variables);
+ CSVFormat format = CSVFormat.newFormat(valueSeparator != null ?
valueSeparator : VALUE_SEPARATOR.getDefaultValue().charAt(0))
.withAllowMissingColumnNames()
.withIgnoreEmptyLines();
- final PropertyValue skipHeaderPropertyValue =
context.getProperty(FIRST_LINE_IS_HEADER);
- if (skipHeaderPropertyValue.getValue() != null &&
skipHeaderPropertyValue.asBoolean()) {
+ final PropertyValue firstLineIsHeaderPropertyValue =
context.getProperty(FIRST_LINE_IS_HEADER);
+ if (firstLineIsHeaderPropertyValue.getValue() != null &&
firstLineIsHeaderPropertyValue.asBoolean()) {
format = format.withFirstRecordAsHeader();
}
- format = format.withQuote(getChar(context, QUOTE_CHAR));
- format = format.withEscape(getChar(context, ESCAPE_CHAR));
+ final Character quoteChar = getCharUnescaped(context, QUOTE_CHAR,
variables);
+ format = format.withQuote(quoteChar != null ? quoteChar :
QUOTE_CHAR.getDefaultValue().charAt(0));
+
+ final Character escapeChar = getCharUnescaped(context, ESCAPE_CHAR,
variables);
+ format = format.withEscape(escapeChar != null ? escapeChar :
ESCAPE_CHAR.getDefaultValue().charAt(0));
+
format = format.withTrim(context.getProperty(TRIM_FIELDS).asBoolean());
if (context.getProperty(COMMENT_MARKER).isSet()) {
- format = format.withCommentMarker(getChar(context,
COMMENT_MARKER));
+ format = format.withCommentMarker(getCharUnescaped(context,
COMMENT_MARKER, variables));
Review comment:
Comment Marker has been changed to support EL.
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