content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  package com.itsaky.androidide.lsp.java.utils;
  
  import androidx.annotation.NonNull;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  public class Extractors {
  
    private static final Pattern PACKAGE_EXTRACTOR =
        Pattern.compile("^([a-z][_a-zA-Z0-9]*\\.)*[a-z][_a-zA-Z0-9]*");
    private static final Pattern SIMPLE_EXTRACTOR = Pattern.compile("[A-Z][_a-zA-Z0-9]*$");
  
    @NonNull
    public static String packageName(String className) {
      Matcher matcher = PACKAGE_EXTRACTOR.matcher(className);
      if (matcher.find()) {
        return matcher.group();
      }
      return "";
    }
  
    @NonNull
    public static String simpleName(String className) {
      Matcher matcher = SIMPLE_EXTRACTOR.matcher(className);
      if (matcher.find()) {
        return matcher.group();
      }
      return "";
    }
  }
  