January 2026 (2026-01) monthly summary for apache/poi. Focused on boosting API usability and rendering fidelity with targeted features, fixes, and tests. Delivered two core features, reinforced by robustness improvements and test coverage to reduce regression risk, enabling faster development and higher fidelity in POI-based applications.

December 2025 monthly summary focused on stabilizing and improving XSLF table rendering in apache/poi. Delivered a targeted fix for XSLFTables table style fallback rendering to ensure correct application of style rules when specific rules are missing, aligning POI behavior with MS Office and LibreOffice. The change addresses scenarios where secondary banding styles (band2H/band2V) were not applied and where color/background fallbacks were not inherited from the whole-table rules, resulting in more consistent and predictable rendering across document types. The patch also reduces fragility by replacing legacy code paths (e.g., uses of java.util.List.getFirst()) and by improving test coverage around table styling. Overall, this work enhances interoperability, reduces user-visible rendering discrepancies, and improves maintainability of the table styling logic.

November 2025 monthly summary for apache/poi focusing on stability improvements in document parsing. The primary work this month was a critical bug fix in XWPFParagraph.getCTSpacing when PPr is missing, complemented by regression testing to ensure no regressions in getters when PPr is absent.

Month: 2025-10. Focused on stabilizing Word document processing in Apache POI. Implemented a robust fix for XWPFTable width handling: when a document lacks explicit table width, the width type now defaults to AUTO per OOXML spec, preventing NullPointerException in XWPFTable.getWidthType(). Added targeted tests to verify behavior for documents without explicit table width settings. This reduces runtime crashes, improves compatibility with legacy and mixed-docs, and enhances overall reliability of POI's Word processing features.

September 2025: API usability enhancement in Apache POI by exposing internal XML bean getters in XWPFDefaultParagraphStyle and XWPFDefaultRunStyle. This change makes underlying data accessible to library users, reducing the need for workarounds and enabling more robust data extraction and debugging. Implemented via the commit that publicizes XML bean getters: 7a124135dec06e658a1d7788091dc4c2ec73d575 (Make getters public for XML beans in XWPF*Style). No major bug fixes recorded for this month; focus was on delivering tangible API improvements and improving downstream flexibility.

July 2025 highlights for apache/poi: Fixed null handling in XWPFParagraph alignment and clarified explicit vs inherited alignment behavior to eliminate rendering inconsistencies. Extended table formatting capabilities with table indentation getters/setters and support for all valid alignment values (including left/right), accompanied by tests. Introduced API-safe SDT improvements with new getters for CTSdt(Content)Cell and delayed text extraction to optimize for XML-only access. Enhanced embedded media handling in runs by adding getEmbeddedCharts() and returning unmodifiable lists for charts and pictures to prevent unsafe mutations. These changes collectively improve formatting fidelity, performance on large documents, and overall API safety.