Embed Directive in Miranda

Here’s the translation of the Go code to Java, with explanations in Markdown format suitable for Hugo:

Java does not have a direct equivalent to the embed directive. However, we can demonstrate a similar concept using Java’s resource loading mechanism. This approach allows you to include files in your JAR and access them at runtime.

First, let’s look at the Java code:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.stream.Collectors;

public class ResourceEmbedding {

    // We can't embed files at compile-time like in Go, but we can load them as resources
    private static String readResource(String resourcePath) {
        try (InputStream inputStream = ResourceEmbedding.class.getResourceAsStream(resourcePath);
             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
            return reader.lines().collect(Collectors.joining("\n"));
        } catch (Exception e) {
            throw new RuntimeException("Failed to read resource: " + resourcePath, e);
        }
    }

    public static void main(String[] args) {
        // Read the contents of 'single_file.txt'
        String fileString = readResource("/folder/single_file.txt");
        System.out.print(fileString);

        // In Java, we don't need a separate byte array version

        // Read files from the embedded folder
        String content1 = readResource("/folder/file1.hash");
        System.out.print(content1);

        String content2 = readResource("/folder/file2.hash");
        System.out.print(content2);
    }
}

In this Java version:

1. We create a readResource method that reads the contents of a file from the classpath. This is similar to embedding files, but it happens at runtime rather than compile-time.

2. We use getResourceAsStream to access files that are packaged within our JAR file.

3. The main method demonstrates reading different files from our resources, similar to the original example.

To run this example:

1. Create a folder directory in your project’s src/main/resources directory (assuming a Maven or Gradle project structure).

2. Add the following files to the folder:

   • single_file.txt with content “hello java”
   • file1.hash with content “123”
   • file2.hash with content “456”

3. Compile and run the Java program:

$ javac ResourceEmbedding.java
$ java ResourceEmbedding
hello java
123
456

Note that in Java, resources are typically packaged into the JAR file when building the project. The exact commands may vary depending on your build system (Maven, Gradle, etc.).

While Java doesn’t have a direct equivalent to the embed directive, this approach allows you to include files in your application and access them at runtime, achieving a similar result to the original example.