Example using inputs from a genrule

Author: NicolasHuertas

java/com/engflow/internship/setinput/README.md

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+NUM_FILES = 10
+
+[genrule(
+    name = "benchmark_test_file" + str(x),
+    outs = ["benchmark_test_file" + str(x) + ".txt"],
+    cmd_bash = "echo 'benchmark test file " + str(x) + "' > $@",
+) for x in range(1,NUM_FILES+1)]
+
+filegroup(
+    name = "genfile",
+    srcs = glob(["genfile/benchmark_test_file*.txt"]),
+    visibility = ["//visibility:public"],
+)

java/com/engflow/internship/setinput/genfile/BUILD

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+java_library(
+    name = "genreader",
+    srcs = ["GenReader.java"],
+    visibility = ["//visibility:public"],
+)

java/com/engflow/internship/setinput/genreader/BUILD

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+package com.engflow.internship.setinput.genreader;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.BufferedReader;
+
+public class GenReader {
+
+    /**
+     * Reads the content of all files in the specified directory and prints it to the console.
+     * @param inputPath
+     */
+    public void readFiles(String inputPath) {
+        File directory = new File(inputPath);
+
+        // Check if the directory exists and is a directory
+        if (!directory.exists() || !directory.isDirectory()) {
+            System.out.println("Invalid directory path: " + inputPath);
+            return;
+        }
+
+        // List all files in the directory and check if there are any
+        File[] files = directory.listFiles();
+        if (files == null || files.length == 0) {
+            System.out.println("No files found in the directory: " + inputPath);
+            return;
+        }
+
+        // Read the content of each file and print it to the console
+        for (File file : files) {
+            if (file.isFile()) {
+                try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+                    String line;
+                    System.out.println("Reading file: " + file.getName());
+                    while ((line = reader.readLine()) != null) {
+                        System.out.println(line);
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+}

java/com/engflow/internship/setinput/genreader/GenReader.java

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+load("@rules_java//java:defs.bzl", "java_binary")
+
+java_binary(
+    name = "main",
+    srcs = ["Main.java"],
+    deps = [
+        "//java/com/engflow/internship/setinput/genreader",
+    ],
+    data = [
+        "//java/com/engflow/internship/setinput/genfile:genfile",
+    ],
+    main_class = "com.engflow.internship.setinput.main.Main",
+)

java/com/engflow/internship/setinput/main/BUILD

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+package com.engflow.internship.setinput.main;
+
+import com.engflow.internship.setinput.genreader.GenReader;
+
+public class Main {
+
+    public static void main(String[] args) {
+        GenReader reader = new GenReader();
+
+        String filePath = "//java/com/engflow/internship/setinput/genfile:genfile";
+
+        reader.readFiles(filePath);
+    }
+}