1 files changed, 53 insertions, 0 deletions
diff --git a/codegen/src/main/java/com/google/gson/codegen/CodeGen.java b/codegen/src/main/java/com/google/gson/codegen/CodeGen.java
new file mode 100644
index 00000000..011568ff
--- /dev/null
+++ b/codegen/src/main/java/com/google/gson/codegen/CodeGen.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2012 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.gson.codegen;
+
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.PackageElement;
+import javax.lang.model.element.TypeElement;
+
+public class CodeGen {
+  private CodeGen() {
+  }
+
+  public static PackageElement getPackage(Element type) {
+    while (type.getKind() != ElementKind.PACKAGE) {
+      type = type.getEnclosingElement();
+    }
+    return (PackageElement) type;
+  }
+
+  /**
+   * Returns a fully qualified class name to complement {@code type}.
+   */
+  public static String adapterName(TypeElement typeElement, String suffix) {
+    StringBuilder builder = new StringBuilder();
+    rawTypeToString(builder, typeElement, '$');
+    builder.append(suffix);
+    return builder.toString();
+  }
+
+  static void rawTypeToString(StringBuilder result, TypeElement type, char innerClassSeparator) {
+    String packageName = getPackage(type).getQualifiedName().toString();
+    String qualifiedName = type.getQualifiedName().toString();
+    result.append(packageName);
+    result.append('.');
+    result.append(
+        qualifiedName.substring(packageName.length() + 1).replace('.', innerClassSeparator));
+  }
+}