Package com.puppycrawl.tools.checkstyle.checks.javadoc

Class JavadocContentLocationCheck

java.lang.Object

com.puppycrawl.tools.checkstyle.AbstractAutomaticBean

com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter

com.puppycrawl.tools.checkstyle.api.AbstractCheck

com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocContentLocationCheck

All Implemented Interfaces:

Configurable, Contextualizable

public class JavadocContentLocationCheck
extends AbstractCheck

Checks that the Javadoc content begins from the same position for all Javadoc comments in the project. Any leading asterisks and spaces are not counted as the beginning of the content and are therefore ignored.

It is possible to enforce two different styles:

• first_line - Javadoc content starts from the first line:

  
   /** Summary text.
     * More details.
     */
   public void method();
   

• second_line - Javadoc content starts from the second line:

  
   /**
     * Summary text.
     * More details.
     */
   public void method();
   

This check does not validate the Javadoc summary itself nor its presence. The check will not report any violations for missing or malformed javadoc summary. To validate the Javadoc summary use SummaryJavadoc check.

The Documentation Comment Specification permits leading asterisks on the first line. For these Javadoc comments:

 /***
   * Some text.
   */
 /************
   * Some text.
   */
 /**           **
   * Some text.
   */
 

The documentation generated will be just "Some text." without any asterisks. Since these asterisks will not appear in the generated documentation, they should not be considered as the beginning of the Javadoc content. In such cases, the check assumes that the Javadoc content begins on the second line.

• Property location - Specify the policy on placement of the Javadoc content. Type is com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocContentLocationOption. Default value is second_line.

Parent is com.puppycrawl.tools.checkstyle.TreeWalker

Violation Message Keys:

• javadoc.content.first.line
• javadoc.content.second.line

Since:

8.27

Nested Class Summary

Nested classes/interfaces inherited from class com.puppycrawl.tools.checkstyle.AbstractAutomaticBean

AbstractAutomaticBean.OutputStreamOptions

Field Summary

Fields

Modifier and Type	Field	Description
private JavadocContentLocationOption	location	Specify the policy on placement of the Javadoc content.
static final String	MSG_JAVADOC_CONTENT_FIRST_LINE	A key is pointing to the warning message text in "messages.properties" file.
static final String	MSG_JAVADOC_CONTENT_SECOND_LINE	A key is pointing to the warning message text in "messages.properties" file.

Constructor Summary

Constructors

Constructor	Description
JavadocContentLocationCheck()

Method Summary

Modifier and Type	Method	Description
private static int	findIndexOfFirstNonBlankLine(String commentContent)	Returns the index of the first non-blank line.
int[]	getAcceptableTokens()	The configurable token set.
int[]	getDefaultTokens()	Returns the default token a check is interested in.
int[]	getRequiredTokens()	The tokens that this check must be registered for.
boolean	isCommentNodesRequired()	Whether comment nodes are required or not.
private static boolean	isMultilineComment(DetailAST node)	Checks if a DetailAST of type TokenTypes.BLOCK_COMMENT_BEGIN span more than one line.
void	setLocation(String value)	Setter to specify the policy on placement of the Javadoc content.
void	visitToken(DetailAST ast)	Called to process a token.

Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractCheck

beginTree, clearViolations, destroy, finishTree, getFileContents, getFilePath, getLine, getLineCodePoints, getLines, getTabWidth, getTokenNames, getViolations, init, 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.AbstractAutomaticBean

configure, contextualize, getConfiguration, setupChild

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MSG_JAVADOC_CONTENT_FIRST_LINE

public static final String MSG_JAVADOC_CONTENT_FIRST_LINE

A key is pointing to the warning message text in "messages.properties" file.

See Also:

• Constant Field Values

MSG_JAVADOC_CONTENT_SECOND_LINE

public static final String MSG_JAVADOC_CONTENT_SECOND_LINE

A key is pointing to the warning message text in "messages.properties" file.

See Also:

• Constant Field Values

location

private JavadocContentLocationOption location

Specify the policy on placement of the Javadoc content.

Constructor Details

JavadocContentLocationCheck

public JavadocContentLocationCheck()

Method Details

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:

• TokenTypes

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:

• TokenTypes

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:

• TokenTypes

isCommentNodesRequired

public boolean isCommentNodesRequired()

Description copied from class: AbstractCheck

Whether comment nodes are required or not.

Overrides:

isCommentNodesRequired in class AbstractCheck

Returns:

false as a default value.

setLocation

public void setLocation(String value)

Setter to specify the policy on placement of the Javadoc content.

Parameters:

value - string to decode location from

Throws:

IllegalArgumentException - if unable to decode

Since:

8.27

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

isMultilineComment

private static boolean isMultilineComment(DetailAST node)

Checks if a DetailAST of type TokenTypes.BLOCK_COMMENT_BEGIN span more than one line. The node always has at least one child of the type TokenTypes.BLOCK_COMMENT_END.

Parameters:

node - node to check

Returns:

true for multi-line comment nodes

findIndexOfFirstNonBlankLine

private static int findIndexOfFirstNonBlankLine(String commentContent)

Returns the index of the first non-blank line. All lines consists only of asterisks and whitespaces are treated as blank.

Parameters:

commentContent - Javadoc content to process

Returns:

the index of the first non-blank line or -1 if all lines are blank