package com.lexicalscope.jewel.cli;

 /*

  * Copyright 2011 Tim Wood

  *

  * 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. 

  */

 class HelpMessageBuilderImpl implements HelpMessage {

     private final StringBuilder message = new StringBuilder();

     @Override public void noUsageInformation() {

         message.append("The options available are:");

     }

     @Override public void hasUsageInformation(final String applicationName) {

         hasUsageInformation();

         message.append(String.format("%s ", applicationName));

     }

     @Override public void hasUsageInformation() {

         message.append("Usage: ");

     }

     @Override public void hasOnlyOptionalOptions() {

         message.append("[");

         message.append("options");

         message.append("]");

     }

     @Override public void hasSomeMandatoryOptions() {

         message.append("options");

     }

     @Override public void hasUnparsedMultiValuedOption(final String valueName) {

         message.append(" ");

         message.append(valueName);

         message.append("...");

     }

     @Override public void hasUnparsedOption(final String valueName) {

         message.append(" ");

         message.append(valueName);

     }

     private final String lineSeparator = System.getProperty("line.separator");

     private String separator = "";

     @Override public void startOfOptions() {

         message.append(lineSeparator);

     }

     @Override public OptionHelpMessage option() {

         message.append(separator).append("\t");

         separator = lineSeparator;

         return new HelpMessageOptionSummaryBuilderImpl(message);

     }

     @Override public void endOfOptions() {

         // OK

     }

     @Override public String toString() {

         return message.toString();

     }

 }