Package com.google.gwt.resources.ext

Class ResourceGeneratorUtil

java.lang.Object
com.google.gwt.resources.ext.ResourceGeneratorUtil
public final class ResourceGeneratorUtil extends Object
Utility methods for building ResourceGenerators.

  • Method Details

    • addNamedFile

      public static void addNamedFile(String resourceName, File file)
      Publish or override resources named by ClientBundle.Source annotations. This method is intended to be called by Generators that create ClientBundle instances and need to pass source data to the ClientBundle system that is not accessible through the classpath.
      Parameters:
      resourceName - the path at which the contents of file should be made available
      file - the File whose contents are to be provided to the ClientBundle system

    • baseName

      public static String baseName(URL resource)
      Returns the base filename of a resource. The behavior is similar to the unix command basename.
      Parameters:
      resource - the URL of the resource
      Returns:
      the final name segment of the resource

    • findResources

      public static URL[] findResources(TreeLogger logger, ResourceContext context, JMethod method) throws UnableToCompleteException
      Find all resources referenced by a method in a bundle. The method's ClientBundle.Source annotation will be examined and the specified locations will be expanded into URLs by which they may be accessed on the local system.

      This method is sensitive to the locale deferred-binding property and will attempt to use a best-match lookup by removing locale components.

      The compiler's ResourceOracle will be used to resolve resource locations. If the desired resource cannot be found in the ResourceOracle, this method will fall back to using the current thread's context ClassLoader. If it is necessary to alter the way in which resources are located, use the overload that accepts a ClassLoader.

      If the method's return type declares the DefaultExtensions annotation, the value of this annotation will be used to find matching resource names if the method lacks a ClientBundle.Source annotation.

      Parameters:
      logger - a TreeLogger that will be used to report errors or warnings
      context - the ResourceContext in which the ResourceGenerator is operating
      method - the method to examine for ClientBundle.Source annotations
      Returns:
      URLs for each ClientBundle.Source annotation value defined on the method.
      Throws:
      UnableToCompleteException - if ore or more of the sources could not be found. The error will be reported via the logger provided to this method

    • findResources

      public static URL[] findResources(TreeLogger logger, ResourceContext context, JMethod method, String[] defaultSuffixes) throws UnableToCompleteException
      Find all resources referenced by a method in a bundle. The method's ClientBundle.Source annotation will be examined and the specified locations will be expanded into URLs by which they may be accessed on the local system.

      This method is sensitive to the locale deferred-binding property and will attempt to use a best-match lookup by removing locale components.

      The compiler's ResourceOracle will be used to resolve resource locations. If the desired resource cannot be found in the ResourceOracle, this method will fall back to using the current thread's context ClassLoader. If it is necessary to alter the way in which resources are located, use the overload that accepts a ClassLoader.

      Parameters:
      logger - a TreeLogger that will be used to report errors or warnings
      context - the ResourceContext in which the ResourceGenerator is operating
      method - the method to examine for ClientBundle.Source annotations
      defaultSuffixes - if the supplied method does not have any ClientBundle.Source annotations, act as though a Source annotation was specified, using the name of the method and each of supplied extensions in the order in which they are specified
      Returns:
      URLs for each ClientBundle.Source annotation value defined on the method.
      Throws:
      UnableToCompleteException - if ore or more of the sources could not be found. The error will be reported via the logger provided to this method

    • getLastModified

      public static long getLastModified(URL[] resources, TreeLogger logger)
      Returns the most recent value of the last-modified header fields of all the Urls in the resources array. The result is the number of milliseconds since January 1, 1970 GMT. Returns 0 if the last-modified header field of one of the resources cannot be determined.
      Returns:
      the most recent modification date of the resources present in resources or 0 if not known.

    • getMethodByPath

      public static JMethod getMethodByPath(JClassType rootType, List<String> pathElements, JType expectedReturnType) throws NotFoundException
      Finds a method by following a dotted path interpreted as a series of no-arg method invocations from an instance of a given root type.
      Parameters:
      rootType - the type from which the search begins
      pathElements - a sequence of no-arg method names
      expectedReturnType - the expected return type of the method to locate, or null if no constraint on the return type is necessary
      Returns:
      the requested JMethod
      Throws:
      NotFoundException - if the requested method could not be found

    • tryFindResource

      public static URL tryFindResource(TreeLogger logger, GeneratorContext genContext, ResourceContext resourceContext, String resourceName)
      Try to find a resource with the given resourceName. It will use the default search order to locate the resource as is used by findResources(com.google.gwt.core.ext.TreeLogger, com.google.gwt.resources.ext.ResourceContext, com.google.gwt.core.ext.typeinfo.JMethod).
      Parameters:
      logger -
      genContext -
      resourceContext -
      resourceName -
      Returns:
      a URL for the resource, if found