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CHANGELOG.md

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BULL Change Log

All notable changes to this project will be documented in this file.

[3.0.4] 2026.04.27

  • Replaces 12-branch if-else chains in ConversionProcessorFactory and ConversionAnalyzer with switch expressions and cached processor singletons, eliminating per-call object allocation in the type conversion hot path
  • Removes AtomicReference allocation in ReflectionUtils.getRealTarget using instanceof pattern matching; eliminates redundant isAnnotationPresent check before getAnnotation
  • Replaces stream-based type checks in ClassUtils.isSpecialType and isCustomSpecialType with plain loops to avoid lambda allocation on frequently-called paths
  • Replaces LinkedList with ArrayList in ClassUtils.getMethods for better cache locality; replaces intermediate collect(toList()) with toList() throughout
  • Replaces inner stream+lambda in AbstractTransformer.withFieldMapping and withFieldTransformer with plain for-each loops
  • Replaces keySet().stream().collect(toMap(...)) in MapPopulator with an entrySet() imperative loop and pre-sized HashMap; applies instanceof pattern matching to eliminate getClass().equals() calls
  • Adds JMH microbenchmarks covering simple-bean, complex-bean, map, and type-conversion transformation paths

[3.0.3] 2026.04.01

  • Refactors TransformerImpl to use direct field access via reflection utilities instead of string-literal field names, improving maintainability and robustness
  • Eliminates redundant ThreadLocal initialisation by reusing the existing rootSourceStack instance
  • Raises JaCoCo code coverage thresholds to 100% across all modules and adds the corresponding branch-coverage tests

[3.0.2] 2026.03.31

  • Fixes a regression introduced in 3.0.1 where field transformers applied to collection elements were incorrectly resolved against the root source object instead of the current element, causing a NullPointerException when a flat field name mapping existed with the same name as the destination field

[3.0.1] 2026.03.30

  • Fixes an issue that was preventing the transformation of Kotlin classes with default parameter values
  • Fixes MissingFieldException when mapping a root-level primitive field into a nested destination object via withFieldMapping (issue #559)

[3.0.0] 2025.05.21

  • Increase the jdk version to 17

[2.2.4] 2024.01.03

  • Bumps to the latest version available all the project dependencies

[2.2.3] 2022.12.01

  • Replaces javax with jakarta
  • Add the possibility to customize the special types avoiding any transformation on them

[2.2.2] 2022.07.06

  • Adds the Bill of Materials (BOM) module

[2.2.1] 2022.06.09

  • Fixes an issue that was preventing skipping the injection for a given field. For more info about the feature see here.

[2.2.0] 2022.01.10

Changed

  • Updated hibernate-validator version to 6.2.1.Final (was 7.0.1.Final). This replaces the jakarta validation with the javax one.

[2.1.2] 2022.01.05

Changed

  • Removes Java Records objects to avoid hosting projects to being forced to use the enable-preview options

[2.1.1] 2021.10.24

Added

  • Adds a function to reset all the defined settings
  • Adds the possibility to map the same source field into multiple fields
  • Adds the possibility to apply the same field transformation function on multiple fields

Changed

  • Updated eg-oss-parent version to 2.4.1 (was 2.4.0).

[2.1.0] 2021.07.23

Changed

  • Renames the package from com.hotels to com.expediagroup

[2.0.1.1] 2021.06.24

Added

  • Adds the javadoc generation to the release

[2.0.1] 2021.06.23

Changed

  • Fixes an issue that was preventing the transformation of Object type fields

[2.0.0] 2021.06.18

Added

  • Increase the jdk version to 15
  • Enables the Java Record transformation