content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  /** Enum that identifies the Java types required to store protobuf fields. */
  @ExperimentalApi
  public enum JavaType {
    VOID(Void.class, Void.class, null),
    INT(int.class, Integer.class, 0),
    LONG(long.class, Long.class, 0L),
    FLOAT(float.class, Float.class, 0F),
    DOUBLE(double.class, Double.class, 0D),
    BOOLEAN(boolean.class, Boolean.class, false),
    STRING(String.class, String.class, ""),
    BYTE_STRING(ByteString.class, ByteString.class, ByteString.EMPTY),
    ENUM(int.class, Integer.class, null),
    MESSAGE(Object.class, Object.class, null);
  
    private final Class<?> type;
    private final Class<?> boxedType;
    private final Object defaultDefault;
  
    JavaType(Class<?> type, Class<?> boxedType, Object defaultDefault) {
      this.type = type;
      this.boxedType = boxedType;
      this.defaultDefault = defaultDefault;
    }
  
    /** The default default value for fields of this type, if it's a primitive type. */
    public Object getDefaultDefault() {
      return defaultDefault;
    }
  
    /** Gets the required type for a field that would hold a value of this type. */
    public Class<?> getType() {
      return type;
    }
  
    /** @return the boxedType */
    public Class<?> getBoxedType() {
      return boxedType;
    }
  
    /** Indicates whether or not this {@link JavaType} can be applied to a field of the given type. */
    public boolean isValidType(Class<?> t) {
      return type.isAssignableFrom(t);
    }
  }
  