apache/parquet-java
Sep 2025 – Dec 2025
3 Months active
Languages Used
JavaXML
Technical Skills
Builder PatternHadoopJavaParquetData ProcessingUnit Testing
Jeronimo López
PROFILE
Jeronimo López
During a three-month period, Jerolba contributed to the apache/parquet-java repository by enhancing API configurability, improving binary data handling, and optimizing build processes. He introduced parameterless constructors and pre-build validation to the ParquetReader and ParquetWriter builders using the Builder Pattern in Java, reducing misconfiguration risks. Jerolba also strengthened VariantUtil’s binary IO path by implementing length-aware ByteBuffer slicing and expanding unit test coverage, which improved reliability for diverse data inputs. Additionally, he streamlined dependency management with Maven by excluding unnecessary classes from shaded JARs, resulting in cleaner builds and smaller artifacts. His work demonstrated depth in Java, Maven, and data processing.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
3Total
Bugs
0
Commits
3
Features
3
Lines of code
209
Activity Months3
Your Network
36 peopleWork History
December 2025
1 Commits • 1 Features
Dec 1, 2025Monthly work summary for 2025-12 focused on delivering a build cleanliness improvement in the apache/parquet-java repository. Key feature delivered: Shaded FastUtil Build Cleanup by excluding package-info.class to shrink shaded JARs and reduce potential conflicts. Implementation via a new Maven POM filter to apply the exclusion during the build. No major bugs fixed this month in this repo. Overall impact: smaller artifacts, cleaner dependency management, and smoother CI/builds, enabling faster distribution and lower risk of runtime class conflicts. Technologies/skills demonstrated: Java, Maven, Maven Shade plugin, POM filtering, build optimization, and dependency management.
1 Commits • 1 Features
Dec 1, 2025Monthly work summary for 2025-12 focused on delivering a build cleanliness improvement in the apache/parquet-java repository. Key feature delivered: Shaded FastUtil Build Cleanup by excluding package-info.class to shrink shaded JARs and reduce potential conflicts. Implementation via a new Maven POM filter to apply the exclusion during the build. No major bugs fixed this month in this repo. Overall impact: smaller artifacts, cleaner dependency management, and smoother CI/builds, enabling faster distribution and lower risk of runtime class conflicts. Technologies/skills demonstrated: Java, Maven, Maven Shade plugin, POM filtering, build optimization, and dependency management.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 — Apache Parquet Java: VariantUtil binary data handling hardened; tested for ByteBuffer slicing with length awareness; fixed bug affecting binary reads; overall reliability improvement in binary IO path.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 — Apache Parquet Java: VariantUtil binary data handling hardened; tested for ByteBuffer slicing with length awareness; fixed bug affecting binary reads; overall reliability improvement in binary IO path.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: API modernization for parquet-java focused on Parquet Builder Enhancements to improve configurability and safety. Implemented parameterless constructors for ParquetReader and ParquetWriter builders and added pre-build validation to ensure either a file or a path is set, preventing runtime errors and simplifying usage for downstream integrations. This work reduces misconfiguration risk and accelerates adoption of the updated API. Commit reference: 43c59767876ca04e45d135cc070a36322fd42077 (GH-3300, PR #3301).
1 Commits • 1 Features
Sep 1, 2025September 2025: API modernization for parquet-java focused on Parquet Builder Enhancements to improve configurability and safety. Implemented parameterless constructors for ParquetReader and ParquetWriter builders and added pre-build validation to ensure either a file or a path is set, preventing runtime errors and simplifying usage for downstream integrations. This work reduces misconfiguration risk and accelerates adoption of the updated API. Commit reference: 43c59767876ca04e45d135cc070a36322fd42077 (GH-3300, PR #3301).
September 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability93.4%
Architecture93.4%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaXML
Technical Skills
Builder PatternData ProcessingDependency ManagementHadoopJavaMavenParquetUnit Testing
Repositories Contributed To
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