Package com.puppycrawl.tools.checkstyle.checks.naming

Class IllegalIdentifierNameCheck

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.naming.AbstractNameCheck

com.puppycrawl.tools.checkstyle.checks.naming.IllegalIdentifierNameCheck

All Implemented Interfaces:

Configurable, Contextualizable

public class IllegalIdentifierNameCheck
extends AbstractNameCheck

Checks identifiers against a regular expression pattern to detect illegal names. Since this check uses a pattern to define valid identifiers, users will need to use negative lookaheads to explicitly ban certain names (e.g., "var") or patterns (e.g., any identifier containing $) while still allowing all other valid identifiers.

• Property format - Sets the pattern to match valid identifiers. Type is java.util.regex.Pattern. Default value is "^(?!var$|\S*\$)\S+$".
• Property tokens - tokens to check Type is java.lang.String[]. Validation type is tokenSet. Default value is: CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF, ANNOTATION_FIELD_DEF, PARAMETER_DEF, VARIABLE_DEF, METHOD_DEF, ENUM_CONSTANT_DEF, PATTERN_VARIABLE_DEF, RECORD_DEF, RECORD_COMPONENT_DEF, LAMBDA.

Parent is com.puppycrawl.tools.checkstyle.TreeWalker

Violation Message Keys:

• name.invalidPattern

Since:

8.36

Nested Class Summary

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

AbstractAutomaticBean.OutputStreamOptions

Field Summary

Fields inherited from class com.puppycrawl.tools.checkstyle.checks.naming.AbstractNameCheck

MSG_INVALID_PATTERN

Constructor Summary

Constructors

Constructor	Description
IllegalIdentifierNameCheck()	Creates a new IllegalIdentifierNameCheck instance.

Method Summary

Modifier and Type	Method	Description
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.
protected boolean	mustCheckName(DetailAST ast)	Decides whether the name of an AST should be checked against the format regexp.

Methods inherited from class com.puppycrawl.tools.checkstyle.checks.naming.AbstractNameCheck

setFormat, visitToken

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.AbstractAutomaticBean

configure, contextualize, getConfiguration, setupChild

Methods inherited from class java.lang.Object

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

Constructor Details

IllegalIdentifierNameCheck

public IllegalIdentifierNameCheck()

Creates a new IllegalIdentifierNameCheck instance.

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:

• 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

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

mustCheckName

protected boolean mustCheckName(DetailAST ast)

Description copied from class: AbstractNameCheck

Decides whether the name of an AST should be checked against the format regexp.

Specified by:

mustCheckName in class AbstractNameCheck

Parameters:

ast - the AST to check.

Returns:

true if the IDENT subnode of ast should be checked against the format regexp.