Package net.sourceforge.pmd.lang
Interface Language
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- All Superinterfaces:
Comparable<Language>
- All Known Subinterfaces:
CpdCapableLanguage
,PmdCapableLanguage
- All Known Implementing Classes:
CpdOnlyLanguageModuleBase
,LanguageModuleBase
,PlainTextLanguage
,SimpleLanguageModuleBase
public interface Language extends Comparable<Language>
Represents a language module, and provides access to language-specific functionality. You can get a language instance from aLanguageRegistry
, seeLanguageRegistry.PMD
for instance.Language instances are extensions to the core of PMD. They can be registered with a service file so that PMD automatically finds them on the classpath.
Instances of this interface are stateless and immutable after construction. They mostly provide metadata about the language, like ID, name and different versions that are supported.
Languages should implement the interfaces
PmdCapableLanguage
orCpdCapableLanguage
to be usable by PMD or CPD, respectively.- See Also:
LanguageVersion
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description @NonNull LanguageVersion
getDefaultVersion()
Returns the default language version for this language.Set<String>
getDependencies()
Returns a set of the IDs of languages that this language instance depends on.List<String>
getExtensions()
Returns the list of file extensions associated with this language.String
getId()
Returns the ID of this language.default LanguageVersion
getLatestVersion()
Returns the latest language version.String
getName()
Returns the full name of this Language.String
getShortName()
Returns the short name of this language.default @Nullable LanguageVersion
getVersion(String version)
Returns the language version with the given version string.Set<String>
getVersionNamesAndAliases()
Returns a complete set of supported version names for this language including all aliases.List<LanguageVersion>
getVersions()
Returns an ordered list of supported versions for this language.default boolean
hasExtension(String extensionWithoutDot)
Returns whether this language handles the given file extension.default boolean
hasVersion(String version)
Returns true if a language version with the given version string is registered.default LanguagePropertyBundle
newPropertyBundle()
Creates a new bundle of properties that will serve to configure theLanguageProcessor
for this language.-
Methods inherited from interface java.lang.Comparable
compareTo
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Method Detail
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getName
String getName()
Returns the full name of this Language. This is generally the name of this language without the use of acronyms, but possibly some capital letters, eg"Java"
. It's suitable for displaying in a GUI.- Returns:
- The full name of this language.
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getShortName
String getShortName()
Returns the short name of this language. This is the commonly used short form of this language's name, perhaps an acronym, but possibly with special characters.- Returns:
- The short name of this language.
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getId
String getId()
Returns the ID of this language. This is a short, alphanumeric, lowercase name, eg"java"
. It's used to identify the language in the ruleset XML, and is also in the package name of the language module.- Returns:
- The ID of this language.
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getExtensions
List<String> getExtensions()
Returns the list of file extensions associated with this language. This list is unmodifiable. Extensions do not have a '.' prefix.- Returns:
- A list of file extensions.
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hasExtension
default boolean hasExtension(String extensionWithoutDot)
Returns whether this language handles the given file extension. The comparison is done ignoring case.- Parameters:
extensionWithoutDot
- A file extension (without '.' prefix)- Returns:
true
if this language handles the extension,false
otherwise.
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getVersions
List<LanguageVersion> getVersions()
Returns an ordered list of supported versions for this language.- Returns:
- All supported language versions.
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getLatestVersion
default LanguageVersion getLatestVersion()
Returns the latest language version. May not be the default.- Returns:
- The latest language version
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getVersionNamesAndAliases
Set<String> getVersionNamesAndAliases()
Returns a complete set of supported version names for this language including all aliases.- Returns:
- All supported language version names and aliases.
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hasVersion
default boolean hasVersion(String version)
Returns true if a language version with the given version string is registered. Then,getVersion
will return a non-null value.- Parameters:
version
- A version string- Returns:
- True if the version string is known
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getVersion
default @Nullable LanguageVersion getVersion(String version)
Returns the language version with the given version string. Returns null if no such version exists.- Parameters:
version
- A language version string.- Returns:
- The corresponding LanguageVersion,
null
if the version string is not recognized.
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getDefaultVersion
@NonNull LanguageVersion getDefaultVersion()
Returns the default language version for this language. This is an arbitrary choice made by the PMD product, and can change between PMD releases. Every language has a default version.- Returns:
- The current default language version for this language.
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newPropertyBundle
default LanguagePropertyBundle newPropertyBundle()
Creates a new bundle of properties that will serve to configure theLanguageProcessor
for this language. The returned bundle must have all supported properties already declared. SeePmdCapableLanguage
andCpdCapableLanguage
for sites where properties are passed back to the language with user-provided values.- Returns:
- A new set of properties
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getDependencies
Set<String> getDependencies()
Returns a set of the IDs of languages that this language instance depends on. Whenever this language is loaded into aLanguageProcessorRegistry
, those dependencies need to be loaded as well.
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