content: package act.inject;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2020 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.apidoc.ApiManager;
  import act.app.ActionContext;
  import org.osgl.$;
  import org.osgl.inject.BeanSpec;
  import org.osgl.inject.ValueLoader;
  import org.osgl.util.E;
  import org.osgl.util.S;
  
  import java.util.Map;
  
  public class SessionValueLoader implements ValueLoader<Object> {
  
      private String sessionKey;
      private Class<?> targetType;
  
      @Override
      public void init(Map<String, Object> map, BeanSpec beanSpec) {
          this.sessionKey = (String) map.get("value");
          if (S.blank(this.sessionKey)) {
              this.sessionKey = beanSpec.name();
          }
          E.unexpectedIf(S.blank(this.sessionKey), "session key not found");
          this.targetType = beanSpec.rawType();
      }
  
      @Override
      public Object get() {
          if (ApiManager.inProgress()) {
              return null;
          }
          ActionContext ctx = ActionContext.current();
          E.illegalStateIf(null == ctx, "Not in request handling context");
          return $.convert(ctx.session(sessionKey)).to(targetType);
      }
  }
  