/*

  * #%L

  * JavaHg

  * %%

  * Copyright (C) 2011 aragost Trifork ag

  * %%

  * Permission is hereby granted, free of charge, to any person obtaining a copy

  * of this software and associated documentation files (the "Software"), to deal

  * in the Software without restriction, including without limitation the rights

  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

  * copies of the Software, and to permit persons to whom the Software is

  * furnished to do so, subject to the following conditions:

  * 

  * The above copyright notice and this permission notice shall be included in

  * all copies or substantial portions of the Software.

  * 

  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

  * THE SOFTWARE.

  * #L%

  */

 package com.aragost.javahg.commands;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import com.aragost.javahg.internals.UnexpectedCommandOutputException;

 /**

  * The statistic returned by running <tt>hg update</tt>.

  */

 public class UpdateResult {

     private static final Pattern UPDATE_LINE_PATTERN = Pattern.compile("^(.*) files updated, (.*) files merged, (.*) files removed, (.*) files unresolved$");

     private int updated;

     private int merged;

     private int removed;

     private int unresolved;

     private UpdateResult() {

     }

     /**

      * @return number of updated files.

      */

     public int getUpdated() {

         return updated;

     }

     /**

      * @return number of merged files. These are the files that were

      *         merged without conflict, see {@link #getUnresolved()}

      *         for the number of files with merge conflicts.

      */

     public int getMerged() {

         return merged;

     }

     /**

      * @return number of removed files.

      */

     public int getRemoved() {

         return removed;

     }

     /**

      * @return number of unresolved files.

      */

     public int getUnresolved() {

         return unresolved;

     }

     /**

      * Factory method to create an {@link UpdateResult}.

      * 

      * @param line

      *            the final line of <tt>hg update</tt>

      * @return the parsed update result.

      */

     public static UpdateResult fromLine(String line) {

         // format of line: 0 files updated, 0 files merged, 0 files

         // removed, 0 files unresolved

         UpdateResult result = new UpdateResult();

         Matcher matcher = UPDATE_LINE_PATTERN.matcher(line);

         if (!matcher.matches()) {

             throw new UnexpectedCommandOutputException("Unexpected format: " + line);

         }

         int[] numbers = new int[4];

         for (int i = 0; i < 4; i++) {

             numbers[i] = Integer.parseInt(line.substring(matcher.start(i + 1), matcher.end(i + 1)));

         }

         result.updated = numbers[0];

         result.merged = numbers[1];

         result.removed = numbers[2];

         result.unresolved = numbers[3];

         return result;

     }

     @Override

     public String toString() {

         return "updated " + getUpdated() + ", merged " + getMerged() + ", removed " + getRemoved() + ", unresolved "

                 + getUnresolved();

     }

 }