Add support Java bindings

This add support for Java bindings in the bindings/java directory.

bindings/java/rs_src/utils.rs

@@ -0,0 +1,30 @@
+use crate::errors::CustomError;
+use jni::objects::{JObject, JValue};
+use jni::JNIEnv;
+
+pub(crate) fn row_to_obj_array<'local>(
+    env: &mut JNIEnv<'local>,
+    row: &limbo_core::Row,
+) -> Result<JObject<'local>, CustomError> {
+    let obj_array =
+        env.new_object_array(row.values.len() as i32, "java/lang/Object", JObject::null())?;
+
+    for (i, value) in row.values.iter().enumerate() {
+        let obj = match value {
+            limbo_core::Value::Null => JObject::null(),
+            limbo_core::Value::Integer(i) => {
+                env.new_object("java/lang/Long", "(J)V", &[JValue::Long(*i)])?
+            }
+            limbo_core::Value::Float(f) => {
+                env.new_object("java/lang/Double", "(D)V", &[JValue::Double(*f)])?
+            }
+            limbo_core::Value::Text(s) => env.new_string(s)?.into(),
+            limbo_core::Value::Blob(b) => env.byte_array_from_slice(b)?.into(),
+        };
+        if let Err(e) = env.set_object_array_element(&obj_array, i as i32, obj) {
+            eprintln!("Error on parsing row: {:?}", e);
+        }
+    }
+
+    Ok(obj_array.into())
+}