Package com.puppycrawl.tools.checkstyle.checks

Class TranslationCheck

  • All Implemented Interfaces:
    Configurable, Contextualizable, FileSetCheck
    public class TranslationCheck
extends AbstractFileSetCheck

    Ensures the correct translation of code by checking property files for consistency regarding their keys. Two property files describing one and the same context are consistent if they contain the same keys. TranslationCheck also can check an existence of required translations which must exist in project, if requiredTranslations option is used.

    Consider the following properties file in the same directory: 

     #messages.properties
 hello=Hello
 cancel=Cancel

 #messages_de.properties
 hell=Hallo
 ok=OK

    The Translation check will find the typo in the German hello key, the missing ok key in the default resource file and the missing cancel key in the German resource file: 

     messages_de.properties: Key 'hello' missing.
 messages_de.properties: Key 'cancel' missing.
 messages.properties: Key 'hell' missing.
 messages.properties: Key 'ok' missing.

    Language code for the property requiredTranslations is composed of the lowercase, two-letter codes as defined by ISO 639-1. Default value is empty String Set which means that only the existence of default translation is checked. Note, if you specify language codes (or just one language code) of required translations the check will also check for existence of default translation files in project.

    Attention: the check will perform the validation of ISO codes if the option is used. So, if you specify, for example, "mm" for language code, TranslationCheck will rise violation that the language code is incorrect.

    Attention: this Check could produce false-positives if it is used with Checker that use cache (property "cacheFile") This is known design problem, will be addressed at issue.

    • Property fileExtensions - Specify file type extension to identify translation files. Setting this property is typically only required if your translation files are preprocessed and the original files do not have the extension .properties Type is java.lang.String[]. Default value is .properties.
    • Property baseName - Specify Base name of resource bundles which contain message resources. It helps the check to distinguish config and localization resources. Type is java.util.regex.Pattern. Default value is "^messages.*$".
    • Property requiredTranslations - Specify language codes of required translations which must exist in project. Type is java.lang.String[]. Default value is "".

    To configure the check to check only files which have '.properties' and '.translations' extensions: 

     <module name="Translation">
   <property name="fileExtensions" value="properties, translations"/>
 </module>

    Note, that files with the same path and base name but which have different extensions will be considered as files that belong to different resource bundles.

    An example of how to configure the check to validate only bundles which base names start with "ButtonLabels": 

     <module name="Translation">
   <property name="baseName" value="^ButtonLabels.*$"/>
 </module>

    To configure the check to check existence of Japanese and French translations: 

     <module name="Translation">
   <property name="requiredTranslations" value="ja, fr"/>
 </module>

    The following example shows how the check works if there is a message bundle which element name contains language code, county code, platform name. Consider that we have the below configuration: 

     <module name="Translation">
   <property name="requiredTranslations" value="es, fr, de"/>
 </module>

    As we can see from the configuration, the TranslationCheck was configured to check an existence of 'es', 'fr' and 'de' translations. Lets assume that we have the resource bundle: 

     messages_home.properties
 messages_home_es_US.properties
 messages_home_fr_CA_UNIX.properties

    Than the check will rise the following violation: "0: Properties file 'messages_home_de.properties' is missing."

    Parent is com.puppycrawl.tools.checkstyle.Checker

    Violation Message Keys:

    • translation.missingKey
    • translation.missingTranslationFile
    Since:
    3.0

    • Field Detail

      • MSG_KEY

        public static final java.lang.String MSG_KEY
        A key is pointing to the warning message text for missing key in "messages.properties" file.
        See Also:
        Constant Field Values

      • MSG_KEY_MISSING_TRANSLATION_FILE

        public static final java.lang.String MSG_KEY_MISSING_TRANSLATION_FILE
        A key is pointing to the warning message text for missing translation file in "messages.properties" file.
        See Also:
        Constant Field Values

    • Constructor Detail

      • TranslationCheck

        public TranslationCheck()
        Creates a new TranslationCheck instance.

    • Method Detail

      • setBaseName

        public void setBaseName​(java.util.regex.Pattern baseName)
        Setter to specify Base name of resource bundles which contain message resources. It helps the check to distinguish config and localization resources.
        Parameters:
        baseName - base name regexp.

      • setRequiredTranslations

        public void setRequiredTranslations​(java.lang.String... translationCodes)
        Setter to specify language codes of required translations which must exist in project.
        Parameters:
        translationCodes - a comma separated list of language codes.

      • 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.

      • finishProcessing

        public void finishProcessing()
        Description copied from interface: FileSetCheck
        Called when all the files have been processed. This is the time to perform any checks that need to be done across a set of files. In this method, the implementation is responsible for the logging of messages.
        Specified by:
        finishProcessing in interface FileSetCheck
        Overrides:
        finishProcessing in class AbstractFileSetCheck