Class RedundantReturnCheck

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

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

    Highlights usage of redundant returns inside constructors and methods with void result.

    For example:

    1. Non-empty constructor

        public HelloWorld(){
            doStuff();
            return;
        }

    2. Method with void result

        public void testMethod1(){
            doStuff();
            return;
        }

    However, if your IDE does not support breakpoints on the method entry, you can allow the use of redundant returns in constructors and methods with void result without code except for 'return;'.

    For example:

    1. Empty constructor

        public HelloWorld(){
            return;
        }

    2. Method with void result and empty body

        public void testMethod1(){
            return;
        }
    Since:
    1.8.0
    Author:
    Troshin Sergey, Max Vetrenko, Alexey Nesterenko
    • 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
      A key is pointing to the warning message text in "messages.properties" file.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int[] getAcceptableTokens()  
      int[] getDefaultTokens()  
      int[] getRequiredTokens()  
      void setAllowReturnInEmptyMethodsAndConstructors​(boolean allowEmptyBlocks)
      Setter for allowReturnInEmptyMethodsAndConstructors.
      void visitToken​(com.puppycrawl.tools.checkstyle.api.DetailAST ast)  
      • Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractCheck

        beginTree, clearViolations, destroy, finishTree, getFileContents, getFilePath, getLine, getLineCodePoints, getLines, getTabWidth, getTokenNames, getViolations, init, isCommentNodesRequired, leaveToken, 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
    • Field Detail

      • MSG_KEY

        public static final String MSG_KEY
        A key is pointing to the warning message text in "messages.properties" file.
        See Also:
        Constant Field Values
    • Constructor Detail

      • RedundantReturnCheck

        public RedundantReturnCheck()
    • Method Detail

      • setAllowReturnInEmptyMethodsAndConstructors

        public void setAllowReturnInEmptyMethodsAndConstructors​(boolean allowEmptyBlocks)
        Setter for allowReturnInEmptyMethodsAndConstructors.
        Parameters:
        allowEmptyBlocks - allow 'return' in empty constructors and methods that return void.
      • 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
      • visitToken

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