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/*
 * Copyright (C) 2014 Square, 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
 *
 *    https://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.avaje.json;


import io.avaje.json.view.ViewBuilderAware;

final class NullSafeAdapter implements JsonAdapter {

  private final JsonAdapter delegate;

  NullSafeAdapter(JsonAdapter delegate) {
    this.delegate = delegate;
  }

  @Override
  public void toJson(JsonWriter writer, T value) {
    if (value == null) {
      writer.nullValue();
    } else {
      delegate.toJson(writer, value);
    }
  }

  @Override
  public T fromJson(JsonReader reader) {
    if (reader.isNullValue()) {
      return null;
    } else {
      return delegate.fromJson(reader);
    }
  }

  @Override
  public boolean isViewBuilderAware() {
    return delegate.isViewBuilderAware();
  }

  @Override
  public ViewBuilderAware viewBuild() {
    return delegate.viewBuild();
  }

  @Override
  public String toString() {
    return delegate + ".nullSafe()";
  }
}