001//////////////////////////////////////////////////////////////////////////////// 002// checkstyle: Checks Java source code for adherence to a set of rules. 003// Copyright (C) 2001-2014 Oliver Burn 004// 005// This library is free software; you can redistribute it and/or 006// modify it under the terms of the GNU Lesser General Public 007// License as published by the Free Software Foundation; either 008// version 2.1 of the License, or (at your option) any later version. 009// 010// This library is distributed in the hope that it will be useful, 011// but WITHOUT ANY WARRANTY; without even the implied warranty of 012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013// Lesser General Public License for more details. 014// 015// You should have received a copy of the GNU Lesser General Public 016// License along with this library; if not, write to the Free Software 017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 018//////////////////////////////////////////////////////////////////////////////// 019package com.puppycrawl.tools.checkstyle.checks.indentation; 020 021import com.puppycrawl.tools.checkstyle.api.DetailAST; 022import com.puppycrawl.tools.checkstyle.api.TokenTypes; 023 024/** 025 * Handler for case statements. 026 * 027 * @author jrichard 028 */ 029public class CaseHandler extends ExpressionHandler 030{ 031 /** 032 * The child elements of a case expression. 033 */ 034 private static final int[] CASE_CHILDREN = new int[] { 035 TokenTypes.LITERAL_CASE, 036 TokenTypes.LITERAL_DEFAULT, 037 }; 038 039 /** 040 * Construct an instance of this handler with the given indentation check, 041 * abstract syntax tree, and parent handler. 042 * 043 * @param indentCheck the indentation check 044 * @param expr the abstract syntax tree 045 * @param parent the parent handler 046 */ 047 public CaseHandler(IndentationCheck indentCheck, 048 DetailAST expr, ExpressionHandler parent) 049 { 050 super(indentCheck, "case", expr, parent); 051 } 052 053 @Override 054 protected IndentLevel getLevelImpl() 055 { 056 return new IndentLevel(getParent().getLevel(), 057 getIndentCheck().getCaseIndent()); 058 } 059 060 /** 061 * Check the indentation of the case statement. 062 */ 063 private void checkCase() 064 { 065 checkChildren(getMainAst(), CASE_CHILDREN, getLevel(), true, false); 066 } 067 068 @Override 069 public IndentLevel suggestedChildLevel(ExpressionHandler child) 070 { 071 return getLevel(); 072 } 073 074 @Override 075 public void checkIndentation() 076 { 077 checkCase(); 078 } 079}