Package com.puppycrawl.tools.checkstyle.checks

Class UniquePropertiesCheck

java.lang.Object

com.puppycrawl.tools.checkstyle.api.AutomaticBean

com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter

com.puppycrawl.tools.checkstyle.api.AbstractFileSetCheck

com.puppycrawl.tools.checkstyle.checks.UniquePropertiesCheck

All Implemented Interfaces:

Configurable, Contextualizable, FileSetCheck

public class UniquePropertiesCheck
extends AbstractFileSetCheck

Detects duplicated keys in properties files.

Rationale: Multiple property keys usually appear after merge or rebase of several branches. While there are no problems in runtime, there can be a confusion due to having different values for the duplicated properties.

• Property fileExtensions - Specify file type extension of the files to check. Type is java.lang.String[]. Default value is .properties.

To configure the check:

 <module name="UniqueProperties"/>
 

Example: in foo.properties file

 key.one=44
 key.two=32 // OK
 key.one=54 // violation
 

To configure the check to scan custom file extensions:

 <module name="UniqueProperties">
  <property name="fileExtensions" value="customProperties"/>
 </module>
 

Example: in foo.customProperties file

 key.one=44
 key.two=32 // OK
 key.one=54 // violation
 

Example: in foo.properties file

 key.one=44
 key.two=32 // OK
 key.one=54 // OK, file is not checked
 

Parent is com.puppycrawl.tools.checkstyle.Checker

Violation Message Keys:

• properties.duplicate.property
• unable.open.cause

Since:

5.7

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	UniquePropertiesCheck.UniqueProperties	Properties subclass to store duplicated property keys in a separate map.

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

AutomaticBean.OutputStreamOptions

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	MSG_IO_EXCEPTION_KEY	Localization key for IO exception occurred on file open.
static java.lang.String	MSG_KEY	Localization key for check violation.
private static java.util.regex.Pattern	SPACE_PATTERN	Pattern matching single space.

Constructor Summary

Constructors

Constructor	Description
UniquePropertiesCheck()	Construct the check with default values.

Method Summary

Modifier and Type	Method	Description
private static java.util.regex.Pattern	getKeyPattern(java.lang.String keyName)	Method returns regular expression pattern given key name.
private static int	getLineNumber(FileText fileText, java.lang.String keyName)	Method returns line number the key is detected in the checked properties files first.
protected void	processFiltered(java.io.File file, FileText fileText)	Called to process a file that matches the specified file extensions.

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

addViolations, beginProcessing, destroy, finishProcessing, fireErrors, getFileContents, getFileExtensions, getMessageDispatcher, getTabWidth, getViolations, init, log, log, process, setFileContents, setFileExtensions, setMessageDispatcher, setTabWidth

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.api.AutomaticBean

configure, contextualize, getConfiguration, setupChild

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.puppycrawl.tools.checkstyle.api.Configurable

configure

Methods inherited from interface com.puppycrawl.tools.checkstyle.api.Contextualizable

contextualize

Field Detail

MSG_KEY

public static final java.lang.String MSG_KEY

Localization key for check violation.

See Also:

Constant Field Values

MSG_IO_EXCEPTION_KEY

public static final java.lang.String MSG_IO_EXCEPTION_KEY

Localization key for IO exception occurred on file open.

See Also:

Constant Field Values

SPACE_PATTERN

private static final java.util.regex.Pattern SPACE_PATTERN

Pattern matching single space.

Constructor Detail

UniquePropertiesCheck

public UniquePropertiesCheck()

Construct the check with default values.

Method Detail

processFiltered

protected void processFiltered(java.io.File file,
                               FileText fileText)

Description copied from class: AbstractFileSetCheck

Called to process a file that matches the specified file extensions.

Specified by:

processFiltered in class AbstractFileSetCheck

Parameters:

file - the file to be processed

fileText - the contents of the file.

getLineNumber

private static int getLineNumber(FileText fileText,
                                 java.lang.String keyName)

Method returns line number the key is detected in the checked properties files first.

Parameters:

fileText - FileText object contains the lines to process

keyName - key name to look for

Returns:

line number of first occurrence. If no key found in properties file, 1 is returned

getKeyPattern

private static java.util.regex.Pattern getKeyPattern(java.lang.String keyName)

Method returns regular expression pattern given key name.

Parameters:

keyName - key name to look for

Returns:

regular expression pattern given key name