/*

  * 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;

     }

 }