/**
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.hadoop.hbase.util;
  
  import java.io.IOException;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hbase.thirdparty.com.google.gson.GsonBuilder;
  import org.apache.hbase.thirdparty.com.google.gson.LongSerializationPolicy;
  import org.apache.hbase.thirdparty.com.google.gson.TypeAdapter;
  import org.apache.hbase.thirdparty.com.google.gson.stream.JsonReader;
  import org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter;
  
  /**
   * Helper class for gson.
   */
  @InterfaceAudience.Private
  public final class GsonUtil {
  
    private GsonUtil() {
    }
  
    /**
     * Create a builder which is used to create a Gson instance.
     * <p/>
     * Will set some common configs for the builder.
     */
    public static GsonBuilder createGson() {
      return new GsonBuilder().setLongSerializationPolicy(LongSerializationPolicy.STRING)
        .registerTypeAdapter(LongAdder.class, new TypeAdapter<LongAdder>() {
  
          @Override
          public void write(JsonWriter out, LongAdder value) throws IOException {
            out.value(value.longValue());
          }
  
          @Override
          public LongAdder read(JsonReader in) throws IOException {
            LongAdder value = new LongAdder();
            value.add(in.nextLong());
            return value;
          }
        });
    }
  
    public static GsonBuilder createGsonWithDisableHtmlEscaping() {
      return createGson().disableHtmlEscaping();
    }
  }