Package com.puppycrawl.tools.checkstyle.filters

Class SuppressionCommentFilter

  • All Implemented Interfaces:
    Configurable, Contextualizable, TreeWalkerFilter
    public class SuppressionCommentFilter
extends AbstractAutomaticBean
implements TreeWalkerFilter

    Filter SuppressionCommentFilter uses pairs of comments to suppress audit events.

    Rationale: Sometimes there are legitimate reasons for violating a check. When this is a matter of the code in question and not personal preference, the best place to override the policy is in the code itself. Semi-structured comments can be associated with the check. This is sometimes superior to a separate suppressions file, which must be kept up-to-date as the source file is edited.

    Note that the suppression comment should be put before the violation. You can use more than one suppression comment each on separate line.

    Attention: This filter may only be specified within the TreeWalker module (<module name="TreeWalker"/>) and only applies to checks which are also defined within this module. To filter non-TreeWalker checks like RegexpSingleline, a SuppressWithPlainTextCommentFilter or similar filter must be used.

    offCommentFormat and onCommentFormat must have equal paren counts.

    SuppressionCommentFilter can suppress Checks that have Treewalker as parent module.

    • Property checkC - Control whether to check C style comments (/* ... */). Type is boolean. Default value is true.
    • Property checkCPP - Control whether to check C++ style comments (//). Type is boolean. Default value is true.
    • Property checkFormat - Specify check pattern to suppress. Type is java.util.regex.Pattern. Default value is ".*".
    • Property idFormat - Specify check ID pattern to suppress. Type is java.util.regex.Pattern. Default value is null.
    • Property messageFormat - Specify message pattern to suppress. Type is java.util.regex.Pattern. Default value is null.
    • Property offCommentFormat - Specify comment pattern to trigger filter to begin suppression. Type is java.util.regex.Pattern. Default value is "CHECKSTYLE:OFF".
    • Property onCommentFormat - Specify comment pattern to trigger filter to end suppression. Type is java.util.regex.Pattern. Default value is "CHECKSTYLE:ON".

    Parent is com.puppycrawl.tools.checkstyle.TreeWalker

    Since:
    3.5

    • Method Detail

      • setOffCommentFormat

        public final void setOffCommentFormat​(Pattern pattern)
        Setter to specify comment pattern to trigger filter to begin suppression.
        Parameters:
        pattern - a pattern.
        Since:
        3.5

      • setOnCommentFormat

        public final void setOnCommentFormat​(Pattern pattern)
        Setter to specify comment pattern to trigger filter to end suppression.
        Parameters:
        pattern - a pattern.
        Since:
        3.5

      • getFileContents

        private FileContents getFileContents()
        Returns FileContents for this filter.
        Returns:
        the FileContents for this filter.

      • setFileContents

        private void setFileContents​(FileContents fileContents)
        Set the FileContents for this filter.
        Parameters:
        fileContents - the FileContents for this filter.

      • setCheckFormat

        public final void setCheckFormat​(String format)
        Setter to specify check pattern to suppress.
        Parameters:
        format - a String value
        Since:
        3.5

      • setMessageFormat

        public void setMessageFormat​(String format)
        Setter to specify message pattern to suppress.
        Parameters:
        format - a String value
        Since:
        3.5

      • setIdFormat

        public void setIdFormat​(String format)
        Setter to specify check ID pattern to suppress.
        Parameters:
        format - a String value
        Since:
        8.24

      • setCheckCPP

        public void setCheckCPP​(boolean checkCpp)
        Setter to control whether to check C++ style comments (//).
        Parameters:
        checkCpp - true if C++ comments are checked.
        Since:
        3.5

      • setCheckC

        public void setCheckC​(boolean checkC)
        Setter to control whether to check C style comments (/* ... */).
        Parameters:
        checkC - true if C comments are checked.
        Since:
        3.5

      • accept

        public boolean accept​(TreeWalkerAuditEvent event)
        Description copied from interface: TreeWalkerFilter
        Determines whether or not a filtered TreeWalkerAuditEvent is accepted.
        Specified by:
        accept in interface TreeWalkerFilter
        Parameters:
        event - the TreeWalkerAuditEvent to filter.
        Returns:
        true if the event is accepted.

      • tagSuppressions

        private void tagSuppressions()
        Collects all the suppression tags for all comments into a list and sorts the list.

      • tagSuppressions

        private void tagSuppressions​(Collection<TextBlock> comments)
        Appends the suppressions in a collection of comments to the full set of suppression tags.
        Parameters:
        comments - the set of comments.

      • tagCommentLine

        private void tagCommentLine​(String text,
                            int line,
                            int column)
        Tags a string if it matches the format for turning checkstyle reporting on or the format for turning reporting off.
        Parameters:
        text - the string to tag.
        line - the line number of text.
        column - the column number of text.

      • addTag

        private void addTag​(String text,
                    int line,
                    int column,
                    SuppressionCommentFilter.TagType reportingOn)
        Adds a Tag to the list of all tags.
        Parameters:
        text - the text of the tag.
        line - the line number of the tag.
        column - the column number of the tag.
        reportingOn - true if the tag turns checkstyle reporting on.