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PMD is a tool that looks for potential problems like possible bugs, dead code, suboptimal code, overcomplicated expressions or duplicate code.

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/*
 * Sonar, open source software quality management tool.
 * Copyright (C) 2008-2012 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * Sonar is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * Sonar is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sonar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.plugins.pmd;

import org.sonar.api.rules.RulePriority;

public final class PmdLevelUtils {

  private PmdLevelUtils() {
    // only static methods
  }

  public static RulePriority fromLevel(String level) {
    if ("1".equals(level)) {
      return RulePriority.BLOCKER;
    }
    if ("2".equals(level)) {
      return RulePriority.CRITICAL;
    }
    if ("3".equals(level)) {
      return RulePriority.MAJOR;
    }
    if ("4".equals(level)) {
      return RulePriority.MINOR;
    }
    if ("5".equals(level)) {
      return RulePriority.INFO;
    }
    return null;
  }

  public static String toLevel(RulePriority priority) {
    if (priority.equals(RulePriority.BLOCKER)) {
      return "1";
    }
    if (priority.equals(RulePriority.CRITICAL)) {
      return "2";
    }
    if (priority.equals(RulePriority.MAJOR)) {
      return "3";
    }
    if (priority.equals(RulePriority.MINOR)) {
      return "4";
    }
    if (priority.equals(RulePriority.INFO)) {
      return "5";
    }
    throw new IllegalArgumentException("Level not supported: " + priority);
  }
}