(java) Add support for java classes

lua/neogen.lua

@@ -130,6 +130,7 @@ neogen.setup = function(opts)
             typescript = require("neogen.configurations.typescript"),
             c = require("neogen.configurations.c"),
             go = require("neogen.configurations.go"),
+            java = require("neogen.configurations.java")
         },
     })
 

lua/neogen/configurations/java.lua

@@ -0,0 +1,34 @@
+return {
+    parent = {
+        class = { "class_declaration" },
+    },
+
+    data = {
+        class = {
+            ["class_declaration"] = {
+                ["0"] = {
+                    extract = function(node)
+                        local results = {}
+                        local tree = { { retrieve = "all", node_type = "identifier", extract = true } }
+                        local nodes = neogen.utilities.nodes:matching_nodes_from(node, tree)
+                        local res = neogen.utilities.extractors:extract_from_matched(nodes)
+
+                        results.class_name = res.identifier
+                        return results
+                    end,
+                },
+            },
+        },
+    },
+
+    template = {
+        annotation_convention = "javadoc",
+        use_default_comment = false,
+
+        javadoc = {
+            { nil, "/**" },
+            { "class_name", " * %s $1"},
+            { nil, " */" },
+        },
+    },
+}