user/super/com/google/gwt/emul/java/lang/Class.java

/*
 * Copyright 2006 Google 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 java.lang;

/**
 * Generally unsupported. This class is provided so that the GWT compiler can
 * choke down class literal references.
 * 
 * @param <T> the type of the object
 */
public final class Class<T> {

  private static final int PRIMITIVE = 0x00000001;
  private static final int INTERFACE = 0x00000002;
  private static final int ARRAY = 0x00000004;
  private static final int ENUM = 0x00000008;

  /**
   * Create a Class object for an array.
   * 
   * @skip
   */
  static Class<?> createForArray(String packageName, String className) {
    // Initialize here to avoid method inliner
    Class<?> clazz = new Class();
    clazz.typeName = packageName + className;
    clazz.modifiers = ARRAY;
    return clazz;
  }

  /**
   * Create a Class object for a class.
   * 
   * @skip
   */
  static Class<?> createForClass(String packageName, String className) {
    // Initialize here to avoid method inliner
    Class<?> clazz = new Class<Object>();
    clazz.typeName = packageName + className;
    return clazz;
  }

  /**
   * Create a Class object for an enum.
   * 
   * @skip
   */
  static Class<?> createForEnum(String packageName, String className) {
    // Initialize here to avoid method inliner
    Class<?> clazz = new Class<Object>();
    clazz.typeName = packageName + className;
    clazz.modifiers = ENUM;
    return clazz;
  }

  /**
   * Create a Class object for an interface.
   * 
   * @skip
   */
  static Class<?> createForInterface(String packageName, String className) {
    // Initialize here to avoid method inliner
    Class<?> clazz = new Class<Object>();
    clazz.typeName = packageName + className;
    clazz.modifiers = INTERFACE;
    return clazz;
  }

  /**
   * Create a Class object for a primitive.
   * 
   * @skip
   */
  static Class<?> createForPrimitive(String packageName, String className) {
    // Initialize here to avoid method inliner
    Class<?> clazz = new Class<Object>();
    clazz.typeName = packageName + className;
    clazz.modifiers = PRIMITIVE;
    return clazz;
  }

  private int modifiers;

  private String typeName;

  /**
   * Not publicly instantiable.
   * 
   * @skip
   */
  private Class() {
  }

  public T[] getEnumConstants() {
    // TODO
    return null;
  }

  public String getName() {
    return typeName;
  }

  public boolean isArray() {
    return (modifiers & ARRAY) != 0;
  }

  public boolean isEnum() {
    return (modifiers & ENUM) != 0;
  }

  public boolean isInterface() {
    return (modifiers & INTERFACE) != 0;
  }

  public boolean isPrimitive() {
    return (modifiers & PRIMITIVE) != 0;
  }

  public String toString() {
    return (isInterface() ? "interface " : (isPrimitive() ? "" : "class "))
        + getName();
  }
}