/*
    *    Copyright 2009-2023 the original author or authors.
    *
    *    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 org.mybatis.guice.configuration.settings;
  
  import com.google.inject.Injector;
  import com.google.inject.Key;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Provider;
  
  import org.apache.ibatis.session.Configuration;
  import org.apache.ibatis.type.TypeHandler;
  
  public final class JavaTypeAndHandlerConfigurationSettingProvider implements Provider<ConfigurationSetting> {
    @Inject
    private Injector injector;
  
    private final Wrapper<?> wrapper;
  
    private JavaTypeAndHandlerConfigurationSettingProvider(final Wrapper<?> wrapper) {
      this.wrapper = wrapper;
    }
  
    @Override
    public ConfigurationSetting get() {
      return wrapper.get(injector);
    }
  
    public static <T> JavaTypeAndHandlerConfigurationSettingProvider create(final Class<T> type,
        final Key<? extends TypeHandler<? extends T>> key) {
      return new JavaTypeAndHandlerConfigurationSettingProvider(new Wrapper<T>(type, key));
    }
  
    private static class Wrapper<T> {
      private final Class<T> type;
      private final Key<? extends TypeHandler<? extends T>> key;
  
      private Wrapper(final Class<T> type, final Key<? extends TypeHandler<? extends T>> key) {
        this.type = type;
        this.key = key;
      }
  
      ConfigurationSetting get(Injector injector) {
        final TypeHandler<? extends T> handlerInstance = injector.getInstance(key);
        return new ConfigurationSetting() {
          @Override
          public void applyConfigurationSetting(Configuration configuration) {
            configuration.getTypeHandlerRegistry().register(type, handlerInstance);
          }
        };
      }
    }
  }