[jnigen] adding the ability for the user to rename

pkgs/jnigen/lib/src/bindings/renamer.dart

@@ -185,7 +185,8 @@ class _ClassRenamer implements Visitor<ClassDecl, void> {
 
     final outerClassName =
         node.outerClass == null ? '' : '${node.outerClass!.finalName}\$';
-    final className = '$outerClassName${_preprocess(node.name)}';
+    final className =
+        '$outerClassName${_preprocess(node.userDefinedName ?? node.name)}';
 
     // When generating all the classes in a single file
     // the names need to be unique.
@@ -196,7 +197,14 @@ class _ClassRenamer implements Visitor<ClassDecl, void> {
         : className;
     node.typeClassName = '\$${node.finalName}\$Type';
     node.nullableTypeClassName = '\$${node.finalName}\$NullableType';
-    log.fine('Class ${node.binaryName} is named ${node.finalName}');
+
+    if (node.userDefinedName == null ||
+        node.userDefinedName == node.finalName) {
+      log.fine('Class ${node.binaryName} is named ${node.finalName}');
+    } else {
+      log.warning('Renaming Class ${node.binaryName} to ${node.userDefinedName}'
+          ' cause a name collision. Renamed to ${node.finalName} instead.');
+    }
 
     // Rename fields before renaming methods. In case a method and a field have
     // identical names, the field will keep its original name and the
@@ -227,7 +235,8 @@ class _MethodRenamer implements Visitor<Method, void> {
 
   @override
   void visit(Method node) {
-    final name = _preprocess(node.isConstructor ? 'new' : node.name);
+    final name = _preprocess(
+        node.isConstructor ? 'new' : node.userDefinedName ?? node.name);
     final sig = node.javaSig;
     // If node is in super class, assign its number, overriding it.
     final superClass =
@@ -245,8 +254,16 @@ class _MethodRenamer implements Visitor<Method, void> {
       node.finalName = _renameConflict(nameCounts, name, _ElementKind.method);
       node.classDecl.methodNumsAfterRenaming[sig] = nameCounts[name]! - 1;
     }
-    log.fine('Method ${node.classDecl.binaryName}#${node.name}'
-        ' is named ${node.finalName}');
+
+    if (node.userDefinedName == null ||
+        node.userDefinedName == node.finalName) {
+      log.fine('Method ${node.classDecl.binaryName}#${node.name}'
+          ' is named ${node.finalName}');
+    } else {
+      log.warning('Renaming Method ${node.classDecl.binaryName}#'
+          '${node.name} to ${node.userDefinedName} cause a name collision. '
+          'Renamed to ${node.finalName} instead.');
+    }
 
     final paramRenamer = _ParamRenamer(config);
     for (final param in node.params) {
@@ -263,10 +280,18 @@ class _FieldRenamer implements Visitor<Field, void> {
 
   @override
   void visit(Field node) {
-    final fieldName = _preprocess(node.name);
+    final fieldName = _preprocess(node.userDefinedName ?? node.name);
     node.finalName = _renameConflict(nameCounts, fieldName, _ElementKind.field);
-    log.fine('Field ${node.classDecl.binaryName}#${node.name}'
-        ' is named ${node.finalName}');
+
+    if (node.userDefinedName == null ||
+        node.userDefinedName == node.finalName) {
+      log.fine('Field ${node.classDecl.binaryName}#${node.name}'
+          ' is named ${node.finalName}');
+    } else {
+      log.warning('Renaming Field ${node.classDecl.binaryName}#${node.name}'
+          ' to ${node.userDefinedName} cause a name collision. '
+          'Renamed to ${node.finalName} instead.');
+    }
   }
 }
 
@@ -277,6 +302,7 @@ class _ParamRenamer implements Visitor<Param, void> {
 
   @override
   void visit(Param node) {
-    node.finalName = _keywordRename(node.name, _ElementKind.field);
+    node.finalName =
+        _keywordRename(node.userDefinedName ?? node.name, _ElementKind.field);
   }
 }

pkgs/jnigen/lib/src/elements/elements.dart

@@ -81,6 +81,9 @@ class ClassDecl with ClassMember, Annotated implements Element<ClassDecl> {
   @JsonKey(includeFromJson: false)
   bool isExcluded;
 
+  @JsonKey(includeFromJson: false)
+  String? userDefinedName;
+
   @override
   final Set<String> modifiers;
 
@@ -647,6 +650,9 @@ class Method with ClassMember, Annotated implements Element<Method> {
   @JsonKey(includeFromJson: false)
   bool isExcluded;
 
+  @JsonKey(includeFromJson: false)
+  String? userDefinedName;
+
   @override
   final String name;
   @override
@@ -707,6 +713,9 @@ class Param with Annotated implements Element<Param> {
     required this.type,
   });
 
+  @JsonKey(includeFromJson: false)
+  String? userDefinedName;
+
   @override
   List<Annotation>? annotations;
   final JavaDocComment? javadoc;
@@ -751,6 +760,9 @@ class Field with ClassMember, Annotated implements Element<Field> {
   @JsonKey(includeFromJson: false)
   bool isExcluded;
 
+  @JsonKey(includeFromJson: false)
+  String? userDefinedName;
+
   @override
   final String name;
   @override

pkgs/jnigen/lib/src/elements/j_elements.dart

@@ -12,6 +12,7 @@ abstract class Visitor {
   void visitClass(ClassDecl c) {}
   void visitMethod(Method method) {}
   void visitField(Field field) {}
+  void visitParam(Param parameter) {}
 }
 
 class Classes implements Element {
@@ -30,15 +31,19 @@ class Classes implements Element {
 }
 
 class ClassDecl implements Element {
-  ClassDecl(this._classDecl) : binaryName = _classDecl.binaryName;
+  ClassDecl(this._classDecl);
   final ast.ClassDecl _classDecl;
 
-  // Ex: com.x.Foo.
-  final String binaryName;
+  String get binaryName => _classDecl.binaryName;
 
   bool get isExcluded => _classDecl.isExcluded;
   set isExcluded(bool value) => _classDecl.isExcluded = value;
 
+  String get name => _classDecl.userDefinedName ?? _classDecl.name;
+  set name(String newName) => _classDecl.userDefinedName = newName;
+
+  String get originalName => _classDecl.name;
+
   @override
   void accept(Visitor visitor) {
     visitor.visitClass(this);
@@ -57,14 +62,37 @@ class Method implements Element {
 
   final ast.Method _method;
 
-  String get name => _method.name;
-
   bool get isExcluded => _method.isExcluded;
   set isExcluded(bool value) => _method.isExcluded = value;
 
+  String get name => _method.userDefinedName ?? _method.name;
+  set name(String newName) => _method.userDefinedName = newName;
+
+  String get originalName => _method.name;
+
   @override
   void accept(Visitor visitor) {
     visitor.visitMethod(this);
+    if (_method.isExcluded) return;
+    for (final param in _method.params) {
+      Param(param).accept(visitor);
+    }
+  }
+}
+
+class Param implements Element {
+  Param(this._param);
+
+  final ast.Param _param;
+
+  String get name => _param.userDefinedName ?? _param.name;
+  set name(String newName) => _param.userDefinedName = newName;
+
+  String get originalName => _param.name;
+
+  @override
+  void accept(Visitor visitor) {
+    visitor.visitParam(this);
   }
 }
 
@@ -73,11 +101,14 @@ class Field implements Element {
 
   final ast.Field _field;
 
-  String get name => _field.name;
-
   bool get isExcluded => _field.isExcluded;
   set isExcluded(bool value) => _field.isExcluded = value;
 
+  String get name => _field.userDefinedName ?? _field.name;
+  set name(String newName) => _field.userDefinedName = newName;
+
+  String get originalName => _field.name;
+
   @override
   void accept(Visitor visitor) {
     visitor.visitField(this);