[realppl 2] Utils #7350
[realppl 2] Utils #7350
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Firebase AI Mock Responses Check
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Summary of Changes
Hello @wu-hui, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request significantly refactors and enhances the Firestore query pipeline's internal architecture. The changes focus on improving the canonical representation and evaluation capabilities of queries, especially for offline processing. By standardizing how pipeline components are identified and compared, and by streamlining the document processing flow, these updates contribute to a more robust, testable, and efficient query execution within the SDK.
Highlights
- Pipeline Canonicalization: Introduced a new
Canonicalizableinterface and implemented it across key pipeline components (RealtimePipeline, Expr, and various Stage subclasses). This provides a consistent string representation for pipeline stages and expressions, enabling reliable comparison and hashing of pipeline objects. - Enhanced Pipeline Evaluation: The
RealtimePipelineclass now includes direct methods for evaluation such asevaluate(),matchesAllDocuments(),hasLimit(),matches(), andcomparator(). This centralizes the logic for processing documents and determining query characteristics directly within the pipeline object. - Internal API Refinement: The
QueryOrPipelineandTargetOrPipelineclasses have been refactored into Kotlinsealed classhierarchies. This improves type safety and readability by explicitly defining the types of objects they can wrap, leveraging Kotlin's idiomatic features. - Shift to List-based Evaluation: The internal pipeline evaluation mechanism has transitioned from using Kotlin
Flow(reactive streams) to directListprocessing for document inputs and outputs inStage.evaluatemethods. This simplifies the evaluation logic, particularly for offline scenarios. - Improved Equality and Hashing: Comprehensive overrides for
equals()andhashCode()methods have been added to numerous pipeline components. This ensures correct behavior when comparing and storing pipeline objects in collections, which is crucial for caching and deduplication.
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Code Review
This pull request introduces a significant and well-executed refactoring of the pipeline functionality, primarily to support local evaluation. The introduction of the Canonicalizable interface and the implementation of equals/hashCode across Stage and Expr classes are excellent changes that enhance correctness and maintainability. The switch to using sealed classes for QueryOrPipeline and TargetOrPipeline is also a great improvement.
I've found one critical bug that could cause a crash during local pipeline evaluation and a couple of medium-severity suggestions to improve code clarity and robustness. Overall, this is a high-quality contribution.
| buffer.forEach { emit(it) } | ||
| } | ||
| else -> emptyFlow() | ||
| limit < 0 -> inputs.takeLast(limit) |
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The evaluate function for LimitStage has a bug when limit is negative. inputs.takeLast(limit) will throw an IllegalArgumentException because limit is negative, but takeLast expects a non-negative count. The intention is likely to take the last -limit elements.
| limit < 0 -> inputs.takeLast(limit) | |
| limit < 0 -> inputs.takeLast(-limit) |
| if (stage.name == "limit") { | ||
| return false | ||
| } |
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Using stage.name == "limit" to check for the LimitStage is a bit brittle. It's better to use a type check with is LimitStage for improved type safety and maintainability. This avoids potential issues if the stage name is ever changed and makes the code's intent clearer.
A similar issue exists in the hasLimit() function on line 865.
| if (stage.name == "limit") { | |
| return false | |
| } | |
| if (stage is LimitStage) { | |
| return false | |
| } |
| private fun evaluateContext(): EvaluationContext { | ||
| return EvaluationContext(this) | ||
| } | ||
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| internal fun comparator(): Comparator<Document> = | ||
| getLastEffectiveSortStage().comparator(evaluateContext()) |
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The evaluateContext() function is a private helper that is only used once. It can be inlined at its call site in comparator() to simplify the code and improve readability.
internal fun comparator(): Comparator<Document> =
getLastEffectiveSortStage().comparator(EvaluationContext(this))
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The public api surface has changed for the subproject firebase-firestore: Please update the api.txt files for the subprojects being affected by this change by running ./gradlew ${subproject}:generateApiTxtFile. Also perform a major/minor bump accordingly. |
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The public api surface has changed for the subproject firebase-firestore: Please update the api.txt files for the subprojects being affected by this change by running ./gradlew ${subproject}:generateApiTxtFile. Also perform a major/minor bump accordingly. |
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The public api surface has changed for the subproject firebase-firestore: Please update the api.txt files for the subprojects being affected by this change by running ./gradlew ${subproject}:generateApiTxtFile. Also perform a major/minor bump accordingly. |
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