pvillard31 opened a new pull request, #10267:
URL: https://github.com/apache/nifi/pull/10267
# Summary
NIFI-14788 - Fix attribute prefix handling in XML Reader
**Problem**: When using `XMLReader` with Parse XML Attributes set to `true`,
Attribute Prefix set, and Schema Access Strategy set to `Infer Schema`,
attribute fields were emitted without the prefix or as `null`
**Root Cause**: Schema inference created fields for attributes using raw
names, while read-time attribute handling also validated against raw names
only. With a configured prefix, the reader wrote prefixed fields but the schema
did not match, leading to dropped/null values.
**Changes**
- `XMLReader:` Passes configured `attribute_prefix` into schema inference
- Constructs `XmlRecordSource(contentStream, contentFieldName,
ignoreWrapper, parseXmlAttributes, attributePrefix)`
- `XmlRecordSource`: Supports attribute prefix during schema inference
- New constructor with `attributePrefix`; attributes are added to child
nodes using the prefixed name when configured
- `XMLRecordReader`: Align attribute handling with schema and prefix
- When Drop Unknown Fields is set to true, schema lookup now accepts
either prefixed or raw attribute field names
- Type coercion uses the data type from the matching schema field
(prefixed if present, else raw)
- Output field name always uses the configured prefix (when set),
ensuring consistent record output
# Tracking
Please complete the following tracking steps prior to pull request creation.
### Issue Tracking
- [ ] [Apache NiFi Jira](https://issues.apache.org/jira/browse/NIFI) issue
created
### Pull Request Tracking
- [ ] Pull Request title starts with Apache NiFi Jira issue number, such as
`NIFI-00000`
- [ ] Pull Request commit message starts with Apache NiFi Jira issue number,
as such `NIFI-00000`
### Pull Request Formatting
- [ ] Pull Request based on current revision of the `main` branch
- [ ] Pull Request refers to a feature branch with one commit containing
changes
# Verification
Please indicate the verification steps performed prior to pull request
creation.
### Build
- [ ] Build completed using `./mvnw clean install -P contrib-check`
- [ ] JDK 21
### Licensing
- [ ] New dependencies are compatible with the [Apache License
2.0](https://apache.org/licenses/LICENSE-2.0) according to the [License
Policy](https://www.apache.org/legal/resolved.html)
- [ ] New dependencies are documented in applicable `LICENSE` and `NOTICE`
files
### Documentation
- [ ] Documentation formatting appears as expected in rendered files
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