Package com.puppycrawl.tools.checkstyle.checks.whitespace

Class NoWhitespaceAfterCheck

java.lang.Object
com.puppycrawl.tools.checkstyle.api.AutomaticBean
com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
com.puppycrawl.tools.checkstyle.api.AbstractCheck
com.puppycrawl.tools.checkstyle.checks.whitespace.NoWhitespaceAfterCheck
All Implemented Interfaces:
Configurable, Contextualizable
public class NoWhitespaceAfterCheck extends AbstractCheck

Checks that there is no whitespace after a token. More specifically, it checks that it is not followed by whitespace, or (if linebreaks are allowed) all characters on the line after are whitespace. To forbid linebreaks after a token, set property allowLineBreaks to false.

The check processes ARRAY_DECLARATOR and INDEX_OP tokens specially from other tokens. Actually it is checked that there is no whitespace before this tokens, not after them. Space after the ANNOTATIONS before ARRAY_DECLARATOR and INDEX_OP will be ignored.

To configure the check: 

 <module name="NoWhitespaceAfter"/>

To configure the check to forbid linebreaks after a DOT token: 

 <module name="NoWhitespaceAfter">
   <property name="tokens" value="DOT"/>
   <property name="allowLineBreaks" value="false"/>
 </module>

If the annotation is between the type and the array, the check will skip validation for spaces: 

 public void foo(final char @NotNull [] param) {} // No violation

Parent is com.puppycrawl.tools.checkstyle.TreeWalker

Violation Message Keys:

  • ws.followed
Since:
3.0

  • Field Details

    • MSG_KEY

      public static final String MSG_KEY
      A key is pointing to the warning message text in "messages.properties" file.
      See Also:

  • Constructor Details

    • NoWhitespaceAfterCheck

      public NoWhitespaceAfterCheck()

  • Method Details

    • getDefaultTokens

      public int[] getDefaultTokens()
      Description copied from class: AbstractCheck
      Returns the default token a check is interested in. Only used if the configuration for a check does not define the tokens.
      Specified by:
      getDefaultTokens in class AbstractCheck
      Returns:
      the default tokens
      See Also:

    • getAcceptableTokens

      public int[] getAcceptableTokens()
      Description copied from class: AbstractCheck
      The configurable token set. Used to protect Checks against malicious users who specify an unacceptable token set in the configuration file. The default implementation returns the check's default tokens.
      Specified by:
      getAcceptableTokens in class AbstractCheck
      Returns:
      the token set this check is designed for.
      See Also:

    • getRequiredTokens

      public int[] getRequiredTokens()
      Description copied from class: AbstractCheck
      The tokens that this check must be registered for.
      Specified by:
      getRequiredTokens in class AbstractCheck
      Returns:
      the token set this must be registered for.
      See Also:

    • setAllowLineBreaks

      public void setAllowLineBreaks(boolean allowLineBreaks)
      Setter to control whether whitespace is allowed if the token is at a linebreak.
      Parameters:
      allowLineBreaks - whether whitespace should be flagged at linebreaks.

    • visitToken

      public void visitToken(DetailAST ast)
      Description copied from class: AbstractCheck
      Called to process a token.
      Overrides:
      visitToken in class AbstractCheck
      Parameters:
      ast - the token to process