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Fallback value to avoid nullpointer exception. #329

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@martino-jembi martino-jembi commented Oct 2, 2024

Summary by CodeRabbit

  • Refactor
    • Improved clarity and consistency in the toInteraction and toInteractionWithScore methods.
    • Enhanced readability of the SourceId construction and conditional checks.
    • Reformatted initialization of demographicData for better visual structure.
    • Modified score retrieval logic to ensure robust handling of null values.

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coderabbitai bot commented Oct 2, 2024

Walkthrough

The changes in this pull request involve modifications to the JsonNodeInteraction record within the JsonNodeInteraction.java file. While the constructor remains unchanged, the internal logic of the toInteraction and toInteractionWithScore methods has been reformatted to enhance clarity and consistency. Adjustments include improved indentation for conditional checks and variable initialization, as well as a more robust handling of the score retrieval process.

Changes

File Path Change Summary
JeMPI_Apps/JeMPI_LibMPI/src/main/java/org/jembi/jempi/libmpi/dgraph/JsonNodeInteraction.java Reformatted toInteraction and toInteractionWithScore methods for clarity; improved indentation and score retrieval logic.

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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (2)
JeMPI_Apps/JeMPI_LibMPI/src/main/java/org/jembi/jempi/libmpi/dgraph/JsonNodeInteraction.java (2)

43-50: LGTM: Improved readability with a minor suggestion

The reformatting of the DemographicData constructor and its stream operation enhances code readability without changing the underlying logic. This is consistent with the formatting improvements made in the previous segment.

For consistency with the previous segment, consider using parentheses around the condition in the ternary operator:

-               return (!(v == null || v.isMissingNode()))
+               return ((v != null && !v.isMissingNode()))
                     ? new DemographicData.DemographicField(AppUtils.snakeToCamelCase(fieldName), v.textValue())
                     : null;

This change would make the null check consistent with the style used for facilityNode and patientNode.


56-57: Excellent improvement: Enhanced null safety with fallback value

This change significantly improves the robustness of the toInteractionWithScore() method by implementing a fallback value mechanism. The introduction of the scoreNode variable and the null-safe score assignment using a ternary operator effectively prevents potential null pointer exceptions.

This enhancement aligns perfectly with the PR objective of implementing a fallback value to avoid null pointer exceptions. It also addresses the issue mentioned in the linked task (API failing on interaction search) by ensuring that the method always returns a valid score, even when the score node is missing or null.

Consider adding a constant for the default score value (0.0f) to improve maintainability and make it easier to adjust the default value in the future if needed.

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📥 Commits

Files that changed from the base of the PR and between c35289b and d40941f.

📒 Files selected for processing (1)
  • JeMPI_Apps/JeMPI_LibMPI/src/main/java/org/jembi/jempi/libmpi/dgraph/JsonNodeInteraction.java (1 hunks)
🔇 Additional comments (2)
JeMPI_Apps/JeMPI_LibMPI/src/main/java/org/jembi/jempi/libmpi/dgraph/JsonNodeInteraction.java (2)

36-41: LGTM: Improved null safety and readability

The changes to the SourceId constructor call enhance both readability and null safety. The added null checks for facilityNode and patientNode ensure that the code handles potential null or missing nodes gracefully, reducing the risk of null pointer exceptions.


Line range hint 1-59: Summary: Successful implementation of fallback value mechanism

This PR successfully achieves its objective of implementing a fallback value mechanism to prevent null pointer exceptions. The changes made to the JsonNodeInteraction class, particularly in the toInteractionWithScore() method, directly address the issue of API failures during interaction searches.

Key improvements:

  1. Enhanced null safety in the SourceId constructor call.
  2. Improved readability through consistent formatting.
  3. Implementation of a fallback value (0.0f) for the interaction score when the score node is null or missing.

These changes collectively contribute to a more robust and reliable codebase, reducing the likelihood of null pointer exceptions and improving the overall stability of the application.

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2 participants