Class InterfaceIsTypeCheck

public final class InterfaceIsTypeCheck

extends Check

Implements Bloch, Effective Java, Item 17 - Use Interfaces only to define types.

An interface should describe a type, it is therefore inappropriate to define an interface that does not contain any methods but only constants.

The check can be configured to also disallow marker interfaces like java.io.Serializable, that do not contain methods or constants at all.

Version:

Method Summary
`int[]`	`getDefaultTokens()`
`int[]`	`getRequiredTokens()`
`void`	`setAllowMarkerInterfaces(boolean aFlag)` Controls whether marker interfaces like Serializable are allowed.
`void`	`visitToken(DetailAST aAST)`

Methods inherited from class com.puppycrawl.tools.checkstyle.api.Check
`beginTree`, `destroy`, `finishTree`, `getAcceptableTokens`, `getClassLoader`, `getDefaultTokens`, `getFileContents`, `getLines`, `getRequiredTokens`, `getTabWidth`, `getTokenNames`, `init`, `leaveToken`, `log`, `log`, `setClassLoader`, `setFileContents`, `setMessages`, `setTabWidth`, `setTokens`, `visitToken`

Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
`getMessageBundle`, `getSeverity`, `getSeverityLevel`, `log`, `log`, `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`

public int[] getDefaultTokens()

Overrides:
getDefaultTokens in interface Check
See Also:
Check

public int[] getRequiredTokens()

Overrides:
getRequiredTokens in interface Check
See Also:
Check

public void setAllowMarkerInterfaces(boolean aFlag)

Controls whether marker interfaces like Serializable are allowed.
Parameters:
aFlag - whether to allow marker interfaces or not

public void visitToken(DetailAST aAST)

Overrides:
visitToken in interface Check
See Also:
Check

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Method Summary