content: package act.inject;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 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 org.osgl.inject.annotation.InjectTag;
  import org.osgl.inject.annotation.LoadValue;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Indicate binding from a {@link org.osgl.http.H.Header} to a controller field or action handler
   * parameter
   */
  @InjectTag
  @LoadValue(HeaderValueLoader.class)
  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.PARAMETER, ElementType.FIELD})
  public @interface HeaderVariable {
  
      /**
       * The HTTP header name
       *
       * Default value: "", meaning it shall
       * use the field name or parameter name to
       * get the header attribute value
       */
      String value() default "";
  }
  