/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.checkstyle;
   
   import com.puppycrawl.tools.checkstyle.api.FileText;
   import com.puppycrawl.tools.checkstyle.checks.regexp.RegexpMultilineCheck;
   import java.io.File;
  import java.util.regex.Pattern;
  
  /**
   * Performs multiline regexp match only if a regexp condition passes.
   *
   * @since 0.5
   */
  public final class ConditionalRegexpMultilineCheck extends
      RegexpMultilineCheck {
  
      /**
       * Condition that passes on any character.
       */
      private static final Pattern ANY = Pattern.compile("\\S|\\s");
  
      /**
       * Condition that has to pass.
       */
      private Pattern condition;
  
      /**
       * Default constructor.
       */
      public ConditionalRegexpMultilineCheck() {
          this.condition = ConditionalRegexpMultilineCheck.ANY;
      }
  
      @Override
      public void processFiltered(final File file, final FileText lines) {
          boolean found = false;
          for (final String line : lines.toLinesArray()) {
              if (this.condition.matcher(line).find()) {
                  found = true;
                  break;
              }
          }
          if (found) {
              super.processFiltered(file, lines);
          }
      }
  
      /**
       * Condition regexp that has to match before checking the core one.
       *
       * @param cond Regexp that has to match in file
       */
      public void setCondition(final String cond) {
          this.condition = Pattern.compile(cond);
      }
  }