Package org.apache.tapestry5.services

Interface ComponentClassResolver

  • All Known Implementing Classes:
    ComponentClassResolverImpl
    @UsesConfiguration(LibraryMapping.class)
public interface ComponentClassResolver
    Resolves page names and component types to fully qualified class names. Pages and components may be provided by the application or inside a mapped package. Page names often appear inside URLs, and component types often appear in component templates (when specifying the type of an embedded component). The service is configured using a collection of LibraryMappings. Each mapping maps a prefix, such as "core" to a root package name, such as "org.apache.tapestry5.corelib". The root package is expected to have sub-packages: "pages", "components", "mixins" and "base" ("base" is for base classes). The resolver performs a search of the classpath (via ClassNameLocator), to build up a set of case-insensitive maps from logical page name, component type, or mixin type to fully qualified class name. Certain ambiguities occur if mapped packages overlap, either in terms of the the prefixes or the package names. Keep things clearly separate to avoid lookup problems.

    • Method Detail

      • resolvePageNameToClassName

        String resolvePageNameToClassName(String pageName)
        Converts a logical page name (such as might be encoded into a URL) into a fully qualified class name. The case of the page name is irrelevant.
        Parameters:
        pageName - page name
        Returns:
        fully qualified class name for the page
        Throws:
        UnknownValueException - if the name does not match a known page class

      • isPageName

        boolean isPageName(String pageName)
        For a particular path, determines if the path is a logical page name. The check is case insensitive.
        Parameters:
        pageName - potential logical page name
        Returns:
        true if the page name is valid

      • getPageNames

        List<String> getPageNames()
        Returns a list of all page names, in sorted order. These are the "canonical" page names.

      • canonicalizePageName

        String canonicalizePageName(String pageName)
        Returns the canonical form of a page name. The canonical form uses character case matching the underlying class name.
        Throws:
        UnknownValueException - if the page name does not match a logical page name

      • resolveComponentTypeToClassName

        String resolveComponentTypeToClassName(String componentType)
        Converts a component type (a logical component name such as might be used inside a template or annotation) into a fully qualified class name. Case is ignored in resolving the name.
        Parameters:
        componentType - a logical component type
        Returns:
        fully qualified class name
        Throws:
        UnknownValueException - if the component type can not be resolved

      • resolveMixinTypeToClassName

        String resolveMixinTypeToClassName(String mixinType)
        Converts a logical mixin type (as with component types) into a fully qualified class name. Case is ignored when resolving the name.
        Parameters:
        mixinType - a logical mixin type
        Returns:
        fully qualified class name
        Throws:
        UnknownValueException - if the mixin type can not be resolved

      • getFolderToPackageMapping

        Map<String,String> getFolderToPackageMapping()
        A mapping from virtual folder name to a package name (used for converting classpath Assets to client URLs). This is derived from the contributed LibraryMappings. It is allowed to contribute multiple root packages as a single folder name. In this case, the best common package name is used. For example, if both com.example.main and com.example.extras is mapped to folder "example", then the package mapping for "example" will be com.example.
        Since:
        5.2.0
        See Also:
        ClasspathAssetAliasManager

      • getLibraryNames

        List<String> getLibraryNames()
        Returns the names of all libraries (as configured). This does not include the application itself (which is a library with the virtual path of empty string).
        Returns:
        sorted names of libraries
        Since:
        5.4

      • getControlledPackageMapping

        Map<String,ControlledPackageType> getControlledPackageMapping()
        Used to identify which packages are controlled packages (from which components are loaded). Future expansion may allow for additional packages which are live reloaded but not components (or perhaps are transformed, but not as components).
        Returns:
        a mapping from package name to ControlledPackageType.
        Since:
        5.3

      • isPage

        boolean isPage(String pageClassName)
        Returns true if the class name is specifically a page class, and not a component, mixin or base class.
        Parameters:
        pageClassName -
        Returns:
        true if a page class
        Since:
        5.3