content: /*
   * Copyright 2010 Proofpoint, 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 io.airlift.json;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.google.common.reflect.TypeParameter;
  import com.google.common.reflect.TypeToken;
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  
  import java.lang.reflect.Type;
  import java.util.List;
  import java.util.Map;
  
  import static com.fasterxml.jackson.databind.SerializationFeature.INDENT_OUTPUT;
  import static java.util.Objects.requireNonNull;
  
  public class JsonCodecFactory
  {
      private final Provider<ObjectMapper> objectMapperProvider;
      private final boolean prettyPrint;
  
      public JsonCodecFactory()
      {
          this(new ObjectMapperProvider());
      }
  
      @Inject
      public JsonCodecFactory(Provider<ObjectMapper> objectMapperProvider)
      {
          this(objectMapperProvider, false);
      }
  
      public JsonCodecFactory(Provider<ObjectMapper> objectMapperProvider, boolean prettyPrint)
      {
          this.objectMapperProvider = objectMapperProvider;
          this.prettyPrint = prettyPrint;
      }
  
      public JsonCodecFactory prettyPrint()
      {
          return new JsonCodecFactory(objectMapperProvider, true);
      }
  
      public <T> JsonCodec<T> jsonCodec(Class<T> type)
      {
          requireNonNull(type, "type is null");
  
          return new JsonCodec<>(createObjectMapper(), type);
      }
  
      public <T> JsonCodec<T> jsonCodec(Type type)
      {
          requireNonNull(type, "type is null");
  
          return new JsonCodec<>(createObjectMapper(), type);
      }
  
      public <T> JsonCodec<T> jsonCodec(TypeToken<T> type)
      {
          requireNonNull(type, "type is null");
  
          return new JsonCodec<>(createObjectMapper(), type.getType());
      }
  
      public <T> JsonCodec<List<T>> listJsonCodec(Class<T> type)
      {
          requireNonNull(type, "type is null");
  
          Type listType = new TypeToken<List<T>>() {}
                  .where(new TypeParameter<T>() {}, type)
                  .getType();
  
          return new JsonCodec<>(createObjectMapper(), listType);
      }
  
      public <T> JsonCodec<List<T>> listJsonCodec(JsonCodec<T> type)
      {
          requireNonNull(type, "type is null");
  
          Type listType = new TypeToken<List<T>>() {}
                  .where(new TypeParameter<T>() {}, type.getTypeToken())
                  .getType();
  
          return new JsonCodec<>(createObjectMapper(), listType);
      }
  
      public <K, V> JsonCodec<Map<K, V>> mapJsonCodec(Class<K> keyType, Class<V> valueType)
      {
          requireNonNull(keyType, "keyType is null");
          requireNonNull(valueType, "valueType is null");
  
          Type mapType = new TypeToken<Map<K, V>>() {}
                  .where(new TypeParameter<K>() {}, keyType)
                  .where(new TypeParameter<V>() {}, valueType)
                  .getType();
  
          return new JsonCodec<>(createObjectMapper(), mapType);
      }
  
      public <K, V> JsonCodec<Map<K, V>> mapJsonCodec(Class<K> keyType, JsonCodec<V> valueType)
      {
          requireNonNull(keyType, "keyType is null");
          requireNonNull(valueType, "valueType is null");
  
          Type mapType = new TypeToken<Map<K, V>>() {}
                  .where(new TypeParameter<K>() {}, keyType)
                  .where(new TypeParameter<V>() {}, valueType.getTypeToken())
                  .getType();
  
          return new JsonCodec<>(createObjectMapper(), mapType);
      }
  
      private ObjectMapper createObjectMapper()
      {
          return objectMapperProvider.get().configure(INDENT_OUTPUT, prettyPrint);
      }
  }
  