Class ReturnNullInsteadOfBooleanCheck

  • All Implemented Interfaces:
    com.puppycrawl.tools.checkstyle.api.Configurable, com.puppycrawl.tools.checkstyle.api.Contextualizable

    public class ReturnNullInsteadOfBooleanCheck
    extends com.puppycrawl.tools.checkstyle.api.AbstractCheck

    It is a bad practice to use Boolean type for ternary logic. It is intended to be used for binary logic.

    Since:
    1.8.0
    Author:
    Ivan Sopov
    • Nested Class Summary

      • Nested classes/interfaces inherited from class com.puppycrawl.tools.checkstyle.api.AutomaticBean

        com.puppycrawl.tools.checkstyle.api.AutomaticBean.OutputStreamOptions
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static String MSG_KEY
      Warning message key.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void beginTree​(com.puppycrawl.tools.checkstyle.api.DetailAST rootAST)  
      int[] getAcceptableTokens()  
      int[] getDefaultTokens()  
      int[] getRequiredTokens()  
      void leaveToken​(com.puppycrawl.tools.checkstyle.api.DetailAST ast)  
      void visitToken​(com.puppycrawl.tools.checkstyle.api.DetailAST ast)  
      • Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractCheck

        clearViolations, destroy, finishTree, getFileContents, getFilePath, getLine, getLineCodePoints, getLines, getTabWidth, getTokenNames, getViolations, init, isCommentNodesRequired, log, log, log, setFileContents, setTabWidth, setTokens
      • Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter

        finishLocalSetup, getCustomMessages, getId, getMessageBundle, getSeverity, getSeverityLevel, setId, setSeverity
      • Methods inherited from class com.puppycrawl.tools.checkstyle.api.AutomaticBean

        configure, contextualize, getConfiguration, setupChild
    • Constructor Detail

      • ReturnNullInsteadOfBooleanCheck

        public ReturnNullInsteadOfBooleanCheck()
    • Method Detail

      • getDefaultTokens

        public int[] getDefaultTokens()
        Specified by:
        getDefaultTokens in class com.puppycrawl.tools.checkstyle.api.AbstractCheck
      • getAcceptableTokens

        public int[] getAcceptableTokens()
        Specified by:
        getAcceptableTokens in class com.puppycrawl.tools.checkstyle.api.AbstractCheck
      • getRequiredTokens

        public int[] getRequiredTokens()
        Specified by:
        getRequiredTokens in class com.puppycrawl.tools.checkstyle.api.AbstractCheck
      • beginTree

        public void beginTree​(com.puppycrawl.tools.checkstyle.api.DetailAST rootAST)
        Overrides:
        beginTree in class com.puppycrawl.tools.checkstyle.api.AbstractCheck
      • visitToken

        public void visitToken​(com.puppycrawl.tools.checkstyle.api.DetailAST ast)
        Overrides:
        visitToken in class com.puppycrawl.tools.checkstyle.api.AbstractCheck
      • leaveToken

        public void leaveToken​(com.puppycrawl.tools.checkstyle.api.DetailAST ast)
        Overrides:
        leaveToken in class com.puppycrawl.tools.checkstyle.api.AbstractCheck