Package freemarker.cache

Class ClassTemplateLoader

java.lang.Object
freemarker.cache.URLTemplateLoader
freemarker.cache.ClassTemplateLoader
All Implemented Interfaces:
TemplateLoader
public class ClassTemplateLoader extends URLTemplateLoader
A TemplateLoader that can load templates from the "classpath". Naturally, it can load from jar files, or from anywhere where Java can load classes from. Internally, it uses Class.getResource(String) or ClassLoader.getResource(String) to load templates.

  • Constructor Details

    • ClassTemplateLoader

      @Deprecated public ClassTemplateLoader()
      Deprecated.
      It's a confusing constructor, and seldom useful; use ClassTemplateLoader(Class, String) instead.
      Creates a template loader that will use the Class.getResource(String) method of its own class to load the resources, and "/" as base package path. This means that that template paths will be resolved relatively the root package of the class hierarchy, so you hardly ever should use this constructor, rather do something like this:
      new ClassTemplateLoader(com.example.myapplication.SomeClass.class, "templates")

      If you extend this class, then the extending class will be used to load the resources.

    • ClassTemplateLoader

      @Deprecated public ClassTemplateLoader​(Class<?> resourceLoaderClass)
      Deprecated.
      It's confusing that the base path is ""; use ClassTemplateLoader(Class, String) instead.
      Creates a template loader that will use the Class.getResource(String) method of the specified class to load the resources, and "" as base package path. This means that template paths will be resolved relatively to the class location, that is, relatively to the directory (package) of the class.
      Parameters:
      resourceLoaderClass - the class whose Class.getResource(String) will be used to load the templates.

    • ClassTemplateLoader

      public ClassTemplateLoader​(Class<?> resourceLoaderClass, String basePackagePath)
      Creates a template loader that will use the Class.getResource(String) method of the specified class to load the resources, and the specified base package path (absolute or relative).

      Examples:

      • Relative base path (will load from the com.example.myapplication.templates package):
        new ClassTemplateLoader(com.example.myapplication.SomeClass.class, "templates")
      • Absolute base path:
        new ClassTemplateLoader(somepackage.SomeClass.class, "/com/example/myapplication/templates")
      Parameters:
      resourceLoaderClass - The class whose Class.getResource(String) method will be used to load the templates. Be sure that you chose a class whose defining class-loader sees the templates. This parameter can't be null.
      basePackagePath - The package that contains the templates, in path (/-separated) format. If it doesn't start with a / then it's relative to the path (package) of the resourceLoaderClass class. If it starts with / then it's relative to the root of the package hierarchy. Note that path components should be separated by forward slashes independently of the separator character used by the underlying operating system. This parameter can't be null.
      See Also:
      ClassTemplateLoader(ClassLoader, String)

    • ClassTemplateLoader

      public ClassTemplateLoader​(ClassLoader classLoader, String basePackagePath)
      Similar to ClassTemplateLoader(Class, String), but instead of Class.getResource(String) it uses ClassLoader.getResource(String). Because a ClassLoader isn't bound to any Java package, it doesn't mater if the basePackagePath starts with / or not, it will be always relative to the root of the package hierarchy
      Since:
      2.3.22

  • Method Details

    • getURL

      protected URL getURL​(String name)
      Description copied from class: URLTemplateLoader
      Given a template name (plus potential locale decorations) retrieves an URL that points the template source.
      Specified by:
      getURL in class URLTemplateLoader
      Parameters:
      name - the name of the sought template, including the locale decorations.
      Returns:
      an URL that points to the template source, or null if the template does not exist.

    • toString

      public String toString()
      Show class name and some details that are useful in template-not-found errors.
      Overrides:
      toString in class Object
      Since:
      2.3.21

    • getResourceLoaderClass

      public Class getResourceLoaderClass()
      See the similar parameter of ClassTemplateLoader(Class, String); null when other mechanism is used to load the resources.
      Since:
      2.3.22

    • getClassLoader

      public ClassLoader getClassLoader()
      See the similar parameter of ClassTemplateLoader(ClassLoader, String); null when other mechanism is used to load the resources.
      Since:
      2.3.22

    • getBasePackagePath

      public String getBasePackagePath()
      See the similar parameter of ClassTemplateLoader(ClassLoader, String); note that this is a normalized version of what was actually passed to the constructor.
      Since:
      2.3.22