code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // This library 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 2.1 of the License, or (at your option) any later version.
  //
  // This library 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 this library; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.puppycrawl.tools.checkstyle.checks.indentation;
  
  import com.puppycrawl.tools.checkstyle.api.DetailAST;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  
  /**
   * Handler for annotation array initialization blocks.
   *
   */
  public class AnnotationArrayInitHandler extends BlockParentHandler {
  
      /**
       * Constant to define that the required character does not exist at any position.
       */
      private static final int NOT_EXIST = -1;
  
      /**
       * Construct an instance of this handler with the given indentation check,
       * abstract syntax tree, and parent handler.
       *
       * @param indentCheck   the indentation check
       * @param ast           the abstract syntax tree
       * @param parent        the parent handler
       */
      public AnnotationArrayInitHandler(IndentationCheck indentCheck,
                              DetailAST ast, AbstractExpressionHandler parent) {
          super(indentCheck, "annotation array initialization", ast, parent);
      }
  
      @Override
      protected IndentLevel getIndentImpl() {
          final DetailAST parentAST = getMainAst().getParent();
          return new IndentLevel(getLineStart(parentAST));
      }
  
      @Override
      protected DetailAST getTopLevelAst() {
          return null;
      }
  
      @Override
      protected DetailAST getLeftCurly() {
          return getMainAst();
      }
  
      @Override
      protected IndentLevel curlyIndent() {
          int offset = 0;
  
          final DetailAST lcurly = getLeftCurly();
          if (isOnStartOfLine(lcurly)) {
              offset = getBraceAdjustment();
          }
  
          final IndentLevel level = new IndentLevel(getIndent(), offset);
          return IndentLevel.addAcceptable(level, level.getLastIndentLevel()
              + getLineWrappingIndentation());
      }
  
      @Override
      protected DetailAST getRightCurly() {
          return getMainAst().findFirstToken(TokenTypes.RCURLY);
      }
  
      @Override
      protected boolean canChildrenBeNested() {
          return true;
      }
  
      @Override
      protected DetailAST getListChild() {
          return getMainAst();
      }
  
      @Override
      protected IndentLevel getChildrenExpectedIndent() {
          IndentLevel expectedIndent =
              new IndentLevel(getIndent(), getArrayInitIndentation(), getLineWrappingIndentation());
  
          final DetailAST leftCurly = getLeftCurly();
          final int firstLine = getFirstLine(getListChild());
          final int lcurlyPos = expandedTabsColumnNo(leftCurly);
          final int firstChildPos =
              getNextFirstNonBlankOnLineAfter(firstLine, lcurlyPos);
  
          // the code is written with old style where curlies are given their own line,
          // the code block should be aligned to lcurly pos + lineWrappingIndent
          if (firstChildPos == NOT_EXIST && lcurlyPos == getLineStart(leftCurly)) {
              expectedIndent = IndentLevel.addAcceptable(expectedIndent,
                          lcurlyPos + getLineWrappingIndentation());
          }
  
          if (firstChildPos != NOT_EXIST) {
              expectedIndent = IndentLevel.addAcceptable(expectedIndent, firstChildPos, lcurlyPos
                      + getLineWrappingIndentation());
          }
  
          return expectedIndent;
      }
  
      /**
       * Returns column number of first non-blank char after
       * specified column on specified line or -1 if
       * such char doesn't exist.
       *
       * @param lineNo   number of line on which we search
       * @param columnNo number of column after which we search
       *
       * @return column number of first non-blank char after
       *         specified column on specified line or -1 if
       *         such char doesn't exist.
       */
      private int getNextFirstNonBlankOnLineAfter(int lineNo, int columnNo) {
          int realColumnNo = columnNo + 1;
          final String line = getIndentCheck().getLines()[lineNo - 1];
          final int lineLength = line.length();
          while (realColumnNo < lineLength
              && Character.isWhitespace(line.charAt(realColumnNo))) {
              realColumnNo++;
          }
  
          if (realColumnNo == lineLength) {
              realColumnNo = -1;
          }
          return realColumnNo;
      }
  
      /**
       * A shortcut for {@code IndentationCheck} property.
       *
       * @return value of lineWrappingIndentation property
       *         of {@code IndentationCheck}
       */
      private int getLineWrappingIndentation() {
          return getIndentCheck().getLineWrappingIndentation();
      }
  
      /**
       * A shortcut for {@code IndentationCheck} property.
       *
       * @return value of arrayInitIndent property
       *         of {@code IndentationCheck}
       */
      private int getArrayInitIndentation() {
          return getIndentCheck().getArrayInitIndent();
      }
  
  }
  