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---
license: apache-2.0
dataset_info:
features:
- name: repo
dtype: string
- name: base_commit
dtype: string
- name: num_java_files
dtype: int32
- name: num_loc
dtype: int32
- name: num_pom_xml
dtype: int32
- name: num_src_test_java_files
dtype: int32
- name: num_test_cases
dtype: int32
- name: license
dtype: string
splits:
- name: test
num_examples: 3
programming_languages: [java]
tags:
- coding
- code-migration
- java
- amazon
- amazon-science
- aws
---
# MIGRATION-BENCH
<table>
<tr>
<td style="padding: 0;">
<a href="https://huggingface.co/collections/AmazonScience/migrationbench-68125452fc21a4564b92b6c3">
<img src="https://img.shields.io/badge/-MIGRATION--BENCH-4d5eff?style=for-the-badge&logo=huggingface&logoColor=ffffff&labelColor" alt="MIGRATION-BENCH">
</a>
</td>
<td style="padding: 0;">
<a href="https://github.com/amazon-science/self_debug">
<img src="https://img.shields.io/badge/Code-000000?style=for-the-badge&logo=github&logoColor=white" alt="Code">
</a>
</td>
<td style="padding: 0; padding-left: 10px; vertical-align: middle;">
<a href="https://huggingface.co/datasets/AmazonScience/migration-bench-java-full">
<img src="https://img.shields.io/badge/-java--full-8a98ff?style=flat&logo=huggingface&logoColor=ffffff&labelColor" alt="java-full">
</a>
</td>
<td style="padding: 0; vertical-align: middle;">
<a href="https://huggingface.co/datasets/AmazonScience/migration-bench-java-selected">
<img src="https://img.shields.io/badge/-java--selected-8a98ff?style=flat&logo=huggingface&logoColor=ffffff&labelColor" alt="java-selected">
</a>
</td>
<td style="padding: 0; vertical-align: middle;">
<a href="https://huggingface.co/datasets/AmazonScience/migration-bench-java-utg">
<img src="https://img.shields.io/badge/-java--utg-8a98ff?style=flat&logo=huggingface&logoColor=ffffff&labelColor" alt="java-utg">
</a>
</td>
</tr>
</table>
## 1. 📖 Overview
[🤗 MIGRATION-BENCH](https://huggingface.co/collections/AmazonScience/migrationbench-68125452fc21a4564b92b6c3)
is a large-scale code migration benchmark dataset at the **repository** level,
across multiple programming languages.
- Current and initial release includes `java 8` repositories with the `maven` build system, as of May 2025.
## 2. Datasets
There are three datasets in [🤗 MIGRATION-BENCH](https://huggingface.co/collections/AmazonScience/migrationbench-68125452fc21a4564b92b6c3):
- All repositories included in the datasets are available on GitHub, under the `MIT` or `Apache-2.0` license.
| Index | Dataset | Size | Notes |
|-------|-----------------------------------------------|-------|-----------------------------------------------------------------------------------------------------|
| 1 | [🤗 `AmazonScience/migration-bench-java-full`](https://huggingface.co/datasets/AmazonScience/migration-bench-java-full) | 5,102 | Each repo has a test directory or at least one test case |
| 2 | [🤗 `AmazonScience/migration-bench-java-selected`](https://huggingface.co/datasets/AmazonScience/migration-bench-java-selected) | 300 | A **subset** of [🤗 `migration-bench-java-full`](https://huggingface.co/datasets/AmazonScience/migration-bench-java-full) |
| 3 | [🤗 `AmazonScience/migration-bench-java-utg`](https://huggingface.co/datasets/AmazonScience/migration-bench-java-utg) | 4,814 | The unit test generation (utg) dataset, **disjoint** with [🤗 `migration-bench-java-full`](https://huggingface.co/datasets/AmazonScience/migration-bench-java-full)|
## 3. Metadata
Metadata is provided in the `csv` file for each dataset:
1. `repo (str)`: The original repo URL without the `https://github.com/` prefix
1. `base_commit (str)`: Base commit id
- At this commit with `java 8` and `maven`, the repository is able to (1) compile and (2) pass existing unit tests and integration tests if any
- It is the starting point for code migration from `java 8`
1. `num_java_files (int)`: Number of `*.java` files in the repository at `base_commit`, similarly for all other `num_*` columns
1. `num_loc (int)`: Lines of code for the repository
1. `num_pom_xml (int)`: Number of modules (`pom.xml` files) in the repository
1. `num_src_test_java_files (int)`: Number of `*.java` files in the dedicated `src/test/` directory
1. `num_test_cases (int)`: Number of test cases, based on running the `mvn -f test .` command in the root directory
- Non negative values indicate number of test cases is parsed correctly from the output
- Negative values means it's unable to parse the output: `[INFO] Results:` (`-2`) or `[INFO] Tests run:` (`-1`) regex is missing
1. `license (str)`: The license of the repository, either `MIT` or `Apache2.0` for the whole dataset
### 3.1 Parsing Java Test Cases
Here is a sample `maven -f test .` command output to get valid `num_test_cases`:
```
...
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
...
```
## 4. 📚 Citation
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