/* * Copyright (C) 2009 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 com.google.gson;/** * Defines the expected format for a {@code long} or {@code Long} type when its serialized. * * @since 1.3 * * @author Inderjeet Singh * @author Joel Leitch */public enum LongSerializationPolicy {  /**   * This is the "default" serialization policy that will output a {@code long} object as a JSON   * number.  For example, assume an object has a long field named "f" then the serialized output   * would be:   * {@code {"f":123}}.   */  DEFAULT(new DefaultStrategy()),    /**   * Serializes a long value as a quoted string.  For example, assume an object has a long field    * named "f" then the serialized output would be:   * {@code {"f":"123"}}.   */  STRING(new StringStrategy());    private final Strategy strategy;    private LongSerializationPolicy(Strategy strategy) {    this.strategy = strategy;  }  /**   * Serialize this {@code value} using this serialization policy.   *   * @param value the long value to be serialized into a {@link JsonElement}   * @return the serialized version of {@code value}   */  public JsonElement serialize(Long value) {    return strategy.serialize(value);  }    private interface Strategy {    JsonElement serialize(Long value);  }    private static class DefaultStrategy implements Strategy {    public JsonElement serialize(Long value) {      return new JsonPrimitive(value);    }  }    private static class StringStrategy implements Strategy {    public JsonElement serialize(Long value) {      return new JsonPrimitive(String.valueOf(value));    }  }}