/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.
   */
  package org.apache.commons.cli2.commandline;
  
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  
  import org.apache.commons.cli2.CommandLine;
  import org.apache.commons.cli2.Option;
  import org.apache.commons.cli2.resource.ResourceConstants;
  import org.apache.commons.cli2.resource.ResourceHelper;
  
  /**
   * Instances of CommandLine represent a command line that has been processed
   * according to the definition supplied to the parser.
   */
  public abstract class CommandLineImpl implements CommandLine {
      public final boolean hasOption(final String trigger) {
          return hasOption(getOption(trigger));
      }
  
      public final List getValues(final String trigger) {
          return getValues(getOption(trigger), Collections.EMPTY_LIST);
      }
  
      public final List getValues(final String trigger,
                                  final List defaultValues) {
          return getValues(getOption(trigger), defaultValues);
      }
  
      public final List getValues(final Option option) {
          return getValues(option, Collections.EMPTY_LIST);
      }
  
      public final Object getValue(final String trigger) {
          return getValue(getOption(trigger), null);
      }
  
      public final Object getValue(final String trigger,
                                   final Object defaultValue) {
          return getValue(getOption(trigger), defaultValue);
      }
  
      public final Object getValue(final Option option) {
          return getValue(option, null);
      }
  
      public final Object getValue(final Option option,
                                   final Object defaultValue) {
          final List values;
  
          if (defaultValue == null) {
              values = getValues(option);
          } else {
              values = getValues(option, Collections.singletonList(defaultValue));
          }
  
          if (values.size() > 1) {
              throw new IllegalStateException(ResourceHelper.getResourceHelper().getMessage(ResourceConstants.ARGUMENT_TOO_MANY_VALUES));
          }
  
          if (values.isEmpty()) {
              return defaultValue;
          }
  
          return values.get(0);
      }
  
      public final Boolean getSwitch(final String trigger) {
          return getSwitch(getOption(trigger), null);
      }
  
      public final Boolean getSwitch(final String trigger,
                                     final Boolean defaultValue) {
          return getSwitch(getOption(trigger), defaultValue);
      }
  
      public final Boolean getSwitch(final Option option) {
          return getSwitch(option, null);
      }
  
      public final String getProperty(final Option option, final String property) {
          return getProperty(option, property, null);
      }
 
     public final int getOptionCount(final String trigger) {
         return getOptionCount(getOption(trigger));
     }
 
     public final int getOptionCount(final Option option) {
         if (option == null) {
             return 0;
         }
 
         int count = 0;
 
         for (Iterator i = getOptions().iterator(); i.hasNext();) {
             if (option.equals(i.next())) {
                 ++count;
             }
         }
 
         return count;
     }
 }