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William Hartman

PROFILE

William Hartman

Over five months, contributed to Pentaho’s core repositories by building and refining features across backend, UI, and scheduling components. Developed secure XPath settings validation in pentaho-platform using Java and XPath, mitigating injection risks through runtime checks and improved user messaging. Enhanced onboarding and plugin management in pentaho-kettle by streamlining the Plugin Manager UI and simplifying welcome screen logic, focusing on Java and front-end development. Addressed scheduling reliability in pentaho-scheduler-plugin by fixing timezone handling with updates to Spring Framework configurations and database schema. Maintained backward compatibility by reverting VFS parameter API changes, demonstrating a pragmatic approach to stability and user experience.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

7Total
Bugs
3
Commits
7
Features
3
Lines of code
52,512
Activity Months5

Your Network

115 people

Work History

March 2026

1 Commits

Mar 1, 2026

March 2026 monthly summary for pentaho/pentaho-scheduler-plugin focusing on business value and technical quality. Delivered a critical timezone handling fix for the scheduling UI to ensure accurate timezone interpretation for single and run-once jobs. The changes include updates to configuration, Spring beans, and database schema to support new scheduling features and align UI behavior with backend scheduling semantics.

February 2026

2 Commits

Feb 1, 2026

February 2026 (2026-02) focused on stabilizing VFS workflows by reverting changes that impacted the parameter API and scheduling capabilities. In pentaho-platform, we rolled back VFS parameter API modifications to restore existing file handling behavior. In pentaho-kettle, we reverted updates affecting scheduling of KTR and KJB files from VFS, returning to verified, pre-change functionality. These actions preserved backward compatibility for customers relying on VFS-based pipelines and reduced potential disruption across integrations.

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025: Delivered Plugin Manager UI improvements for pentaho/pentaho-kettle, focusing on clarity, consistency, and usability for handling missing plugins in jobs and transformation steps. Key changes include renaming Marketplace to Plugin Manager, conditional display of the Plugin Manager button based on availability, and clearer, actionable error messages.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for pentaho-pentaho-kettle: Focused on onboarding UX improvements and codebase cleanup to reduce friction for new users and lower maintenance costs. Delivered Plugin Manager Welcome Screen UX cleanup, including removal of Marketplace link from Extend, deletion of unused index_no_osgi.html, and a refactor of the welcome-page loading logic in Spoon.java. These changes simplify onboarding, reduce unused content, and improve maintainability.

March 2025

2 Commits • 1 Features

Mar 1, 2025

March 2025 - Key release: XPath Settings Validation and Security Enhancement in pentaho-platform. Implemented isXPathUnSafe flag, integrated validation into getSetting/getSettings, updated user-facing messages, and allowed '*' in XPath settings. Security impact: mitigates potential XPath injection risks; delivered via PPP-5594 fixes. Repositories: pentaho/pentaho-platform.

Activity

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Quality Metrics

Correctness85.8%
Maintainability82.8%
Architecture80.0%
Performance77.2%
AI Usage22.8%

Skills & Technologies

Programming Languages

HTMLJavaPropertiesXML

Technical Skills

API DevelopmentBackend DevelopmentDatabase ManagementFront-end DevelopmentInternationalizationJavaJava DevelopmentPlugin ManagementSecuritySoftware EngineeringSpring FrameworkUI DevelopmentWeb ServicesXPath

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

pentaho/pentaho-platform

Mar 2025 Feb 2026
2 Months active

Languages Used

JavaProperties

Technical Skills

Backend DevelopmentSecurityXPathAPI DevelopmentJava

pentaho/pentaho-kettle

Apr 2025 Feb 2026
3 Months active

Languages Used

HTMLJavaProperties

Technical Skills

Front-end DevelopmentJava DevelopmentInternationalizationPlugin ManagementUI DevelopmentBackend Development

pentaho/pentaho-scheduler-plugin

Mar 2026 Mar 2026
1 Month active

Languages Used

JavaXML

Technical Skills

Database ManagementJava DevelopmentSpring FrameworkWeb Services