Java

An FFM (Panama) wrapper over the C ABI. Construct an Xray from a JSON spec, then drive it with command(json) -> json — load a dataset, then build a frame.

xml

<!-- Maven Central -->
<dependency>
  <groupId>org.wickra</groupId>
  <artifactId>wickra-xray</artifactId>
  <version>0.1.0</version>
</dependency>

java

import org.wickra.xray.Xray;

public final class Frame {
    private static final String SPEC =
        "{\"dataset_ref\":\"m\",\"symbol\":\"BTCUSDT\","
        + "\"panels\":[{\"kind\":\"footprint\",\"price_bin\":1.0,\"bucket_ms\":60000}]}";

    public static void main(String[] args) {
        try (Xray xray = new Xray(SPEC)) {
            xray.command(LOAD);   // {"cmd":"load","dataset": ...}
            String response = xray.command("{\"cmd\":\"frame\"}");
            System.out.println("wickra-xray " + Xray.version());
            System.out.println(response);
        }
    }
}

The binding uses the Java Foreign Function & Memory API, so it needs JDK 22+ and --enable-native-access.

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