content: package act.cli.meta;
  
  /*-
   * #%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.builtin.Help;
  import org.osgl.util.E;
  import org.osgl.util.S;
  
  /**
   * Store the option annotation meta info. There are two mutually exclusive
   * option annotations:
   * <ul>
   *     <li>{@link act.cli.Optional}</li>
   *     <li>{@link act.cli.Required}</li>
   * </ul>
   */
  public class OptionAnnoInfoBase {
      /*
       * e.g -o
       */
      private String lead1;
      /*
       * e.g. --option
       */
      private String lead2;
      private String defVal;
      private String group;
      private String help = "";
      private boolean required;
      private String param;
  
      public OptionAnnoInfoBase(boolean optional) {
          this.required = !optional;
      }
  
      @Override
      public String toString() {
          return S.fmt("%s %s", leads(), help());
      }
  
      public OptionAnnoInfoBase spec(String[] specs) {
          E.illegalArgumentIf(null == specs || specs.length == 0);
          lead1 = specs[0];
          if (specs.length > 1) {
              lead2 = specs[1];
          } else {
              String[] sa = lead1.split("[,;\\s]+");
              if (sa.length > 2) {
                  throw E.unexpected("Option cannot have more than two leads");
              }
              if (sa.length > 1) {
                  lead1 = sa[0];
                  lead2 = sa[1];
              }
          }
          Help.updateMaxWidth(leads().length());
          return this;
      }
  
      public String lead1() {
          return lead1;
      }
  
      public String lead2() {
          return lead2;
      }
  
      public String leads() {
          if (null == lead1 && null == lead2) {
              return "";
          }
          if (null == lead1) {
              return lead2;
          } else if (null == lead2) {
              return lead1;
          }
          return S.join(",", lead1, lead2);
      }
  
      private void setLeadsIfNotSet(String paramName) {
          if (null == lead1) {
              lead1 = "-" + paramName.charAt(0);
              lead2 = "--" + paramName;
          }
      }
  
      public OptionAnnoInfoBase required(boolean required) {
          this.required = required;
          return this;
      }
  
      public boolean required() {
          return required;
      }
  
      public OptionAnnoInfoBase defVal(String defVal) {
          this.defVal = defVal;
          return this;
      }
  
      public String defVal() {
          return defVal;
      }
  
      public OptionAnnoInfoBase group(String group) {
          this.group = group;
          return this;
      }
  
      public String group() {
          return group;
      }
  
      public OptionAnnoInfoBase paramName(String name) {
          param = name;
          setLeadsIfNotSet(name);
          return this;
      }
  
      public OptionAnnoInfoBase help(String helpMessage) {
          help = helpMessage;
          return this;
      }
  
      public String help() {
          return help;
      }
  }
  