Coverage Report - com.puppycrawl.tools.checkstyle.checks.indentation.IfHandler
 
Classes in this File Line Coverage Branch Coverage Complexity
IfHandler
100%
27/27
100%
10/10
1.5
 
 1  
 ////////////////////////////////////////////////////////////////////////////////
 2  
 // checkstyle: Checks Java source code for adherence to a set of rules.
 3  
 // Copyright (C) 2001-2017 the original author or authors.
 4  
 //
 5  
 // This library is free software; you can redistribute it and/or
 6  
 // modify it under the terms of the GNU Lesser General Public
 7  
 // License as published by the Free Software Foundation; either
 8  
 // version 2.1 of the License, or (at your option) any later version.
 9  
 //
 10  
 // This library is distributed in the hope that it will be useful,
 11  
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 13  
 // Lesser General Public License for more details.
 14  
 //
 15  
 // You should have received a copy of the GNU Lesser General Public
 16  
 // License along with this library; if not, write to the Free Software
 17  
 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 18  
 ////////////////////////////////////////////////////////////////////////////////
 19  
 
 20  
 package com.puppycrawl.tools.checkstyle.checks.indentation;
 21  
 
 22  
 import com.puppycrawl.tools.checkstyle.api.DetailAST;
 23  
 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
 24  
 
 25  
 /**
 26  
  * Handler for if statements.
 27  
  *
 28  
  * @author jrichard
 29  
  */
 30  
 public class IfHandler extends BlockParentHandler {
 31  
     /**
 32  
      * Construct an instance of this handler with the given indentation check,
 33  
      * abstract syntax tree, and parent handler.
 34  
      *
 35  
      * @param indentCheck   the indentation check
 36  
      * @param ast           the abstract syntax tree
 37  
      * @param parent        the parent handler
 38  
      */
 39  
     public IfHandler(IndentationCheck indentCheck,
 40  
         DetailAST ast, AbstractExpressionHandler parent) {
 41  133
         super(indentCheck, "if", ast, parent);
 42  133
     }
 43  
 
 44  
     @Override
 45  
     public IndentLevel getSuggestedChildIndent(AbstractExpressionHandler child) {
 46  
         final IndentLevel result;
 47  118
         if (child instanceof ElseHandler) {
 48  51
             result = getIndent();
 49  
         }
 50  
         else {
 51  67
             result = super.getSuggestedChildIndent(child);
 52  
         }
 53  118
         return result;
 54  
     }
 55  
 
 56  
     @Override
 57  
     protected IndentLevel getIndentImpl() {
 58  
         final IndentLevel result;
 59  133
         if (isIfAfterElse()) {
 60  15
             result = getParent().getIndent();
 61  
         }
 62  
         else {
 63  118
             result = super.getIndentImpl();
 64  
         }
 65  133
         return result;
 66  
     }
 67  
 
 68  
     /**
 69  
      * Determines if this 'if' statement is part of an 'else' clause
 70  
      * and on the same line.
 71  
      *
 72  
      * @return true if this 'if' is part of an 'else', false otherwise
 73  
      */
 74  
     private boolean isIfAfterElse() {
 75  
         // check if there is an 'else' and an 'if' on the same line
 76  266
         final DetailAST parent = getMainAst().getParent();
 77  532
         return parent.getType() == TokenTypes.LITERAL_ELSE
 78  38
             && parent.getLineNo() == getMainAst().getLineNo();
 79  
     }
 80  
 
 81  
     @Override
 82  
     protected void checkTopLevelToken() {
 83  133
         if (!isIfAfterElse()) {
 84  118
             super.checkTopLevelToken();
 85  
         }
 86  133
     }
 87  
 
 88  
     /**
 89  
      * Check the indentation of the conditional expression.
 90  
      */
 91  
     private void checkCondExpr() {
 92  133
         final DetailAST condAst = getMainAst().findFirstToken(TokenTypes.LPAREN)
 93  133
             .getNextSibling();
 94  133
         final IndentLevel expected =
 95  133
             new IndentLevel(getIndent(), getBasicOffset());
 96  133
         checkExpressionSubtree(condAst, expected, false, false);
 97  133
     }
 98  
 
 99  
     @Override
 100  
     public void checkIndentation() {
 101  133
         super.checkIndentation();
 102  133
         checkCondExpr();
 103  133
         checkWrappingIndentation(getMainAst(), getIfStatementRightParen(getMainAst()));
 104  133
     }
 105  
 
 106  
     /**
 107  
      * Returns right parenthesis of if statement.
 108  
      * @param literalIfAst
 109  
      *          literal-if ast node(TokenTypes.LITERAL_IF)
 110  
      * @return right parenthesis of if statement.
 111  
      */
 112  
     private static DetailAST getIfStatementRightParen(DetailAST literalIfAst) {
 113  133
         return literalIfAst.findFirstToken(TokenTypes.RPAREN);
 114  
     }
 115  
 }