com.puppycrawl.tools.checkstyle.checks.imports
Class AvoidStarImportCheck

java.lang.Object
  com.puppycrawl.tools.checkstyle.api.AutomaticBean
      com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
          com.puppycrawl.tools.checkstyle.api.Check
              com.puppycrawl.tools.checkstyle.checks.imports.AvoidStarImportCheck

All Implemented Interfaces:

Configurable, Contextualizable

public class AvoidStarImportCheck

extends Check

Check that finds import statements that use the * notation.

Rationale: Importing all classes from a package leads to tight coupling between packages and might lead to problems when a new version of a library introduces name clashes.

An example of how to configure the check is:

 <module name="AvoidStarImport">
   <property name="excludes" value="java.io,java.net"/>
 </module>
 

The optional "excludes" property allows for certain packages like java.io or java.net to be exempted from the rule. Note that the excludes property is not recursive, subpackages of excluded packages are not automatically excluded.

Version:

1.0

Author:

Oliver Burn, Bill Schneider

Constructor Summary

AvoidStarImportCheck()

Method Summary

int[]	getDefaultTokens() Returns the default token a check is interested in.
void	setExcludes(java.lang.String[] aExcludes) Sets the list of packages to exempt from the check.
void	visitToken(DetailAST aAST) Called to process a token.

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

beginTree, destroy, finishTree, getAcceptableTokens, getClassLoader, getFileContents, getLines, getRequiredTokens, getTabWidth, getTokenNames, init, leaveToken, log, log, setClassLoader, setFileContents, setMessages, setTabWidth, setTokens

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

getMessageBundle, getSeverity, getSeverityLevel, log, log, log, log, log, log, log, log, log, setSeverity

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

configure, contextualize, finishLocalSetup, getConfiguration, setupChild

Methods inherited from class java.lang.Object

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

Constructor Detail

AvoidStarImportCheck

public AvoidStarImportCheck()

Method Detail

getDefaultTokens

public int[] getDefaultTokens()

Description copied from class: Check

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 Check

Returns:

the default tokens

See Also:

Check

setExcludes

public void setExcludes(java.lang.String[] aExcludes)

Sets the list of packages to exempt from the check.

Parameters:

aExcludes - a list of package names where star imports are ok

visitToken

public void visitToken(DetailAST aAST)

Description copied from class: Check

Called to process a token.

Overrides:

visitToken in class Check

Parameters:

aAST - the token to process

See Also:

Check