Java example source code file (CodeGen.java)

This example Java source code file (CodeGen.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

codegen, packageelement, string, stringbuilder, typeelement

The CodeGen.java Java example source code

/*
 * 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));
  }
}