content: package act.inject.param;
  
  /*-
   * #%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 act.cli.CliContext;
  import act.util.ActContext;
  import org.osgl.util.S;
  import org.osgl.util.StringValueResolver;
  
  class CliArgumentLoader extends CliParamValueLoader {
  
      private final StringValueResolver resolver;
  
      CliArgumentLoader(StringValueResolver resolver, String defVal) {
          this.resolver = resolver;
          CliContext.ParsingContextBuilder.foundArgument(defVal);
      }
  
      @Override
      public String toString() {
          return S.concat("cli argument loader[", bindName(), "]");
      }
  
      @Override
      public Object load(Object cached, ActContext<?> context, boolean noDefaultValue) {
          CliContext ctx = (CliContext) context;
          CliContext.ParsingContext ptx = ctx.parsingContext();
          int id = ptx.curArgId().getAndIncrement();
          String optVal = ctx.commandLine().argument(id);
          Object val = null;
          if (S.isBlank(optVal)) {
              optVal = ptx.argDefVals.get(id);
          }
          if (S.notBlank(optVal)) {
              val = resolver.resolve(optVal);
          }
          if (null == val && null != cached) {
              val = cached;
          }
          return val;
      }
  
      @Override
      public String bindName() {
          return null;
      }
  }
  