org.apache.tapestry5.internal.services

## Class AssetSourceImpl

- java.lang.Object
- - org.apache.tapestry5.ioc.internal.util.LockSupport
  - - org.apache.tapestry5.internal.services.AssetSourceImpl

- All Implemented Interfaces:
    AssetSource

      public class AssetSourceImpl
      extends LockSupport
      implements AssetSource

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `AssetSourceImpl(ThreadLocale threadLocale, Map<String,AssetFactory> configuration, SymbolSource symbolSource, org.slf4j.Logger logger, OperationTracker tracker)`
    `AssetSourceImpl(ThreadLocale threadLocale, Map<String,AssetFactory> configuration, SymbolSource symbolSource, org.slf4j.Logger logger, OperationTracker tracker, Request request)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `clearCacheWhenResourcesChange(ResourceChangeTracker tracker)`
    `Asset` | `getAsset(Resource baseResource, String path, Locale locale)` Finds the asset.
    `Asset` | `getClasspathAsset(String path)` Obtains a classpath asset in the current locale (as defined by the `ThreadLocale` service).
    `Asset` | `getClasspathAsset(String path, Locale locale)` Convenience for finding assets on the classpath.
    `Asset` | `getComponentAsset(ComponentResources resources, String path, String libraryName)` Gets an asset that is used with, or injected into, a component, that will be exposed to the client.
    `Asset` | `getContextAsset(String path, Locale locale)` Convenience for finding assets in the context.
    `Asset` | `getExpandedAsset(String path)` As with `AssetSource.getUnlocalizedAsset(String)`, but symbols in the path are expanded}.
    `Asset` | `getUnlocalizedAsset(String path)` Find an asset but does not attempt to localize it.
    `Resource` | `resourceForPath(String path)` Finds the asset, either on the classpath or (if prefixed), within the indicated domain.

    - ### Methods inherited from class org.apache.tapestry5.ioc.internal.util.LockSupport

      `acquireReadLock, downgradeWriteLockToReadLock, releaseReadLock, releaseWriteLock, takeWriteLock, upgradeReadLockToWriteLock`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### AssetSourceImpl

          public AssetSourceImpl(ThreadLocale threadLocale,
                         Map<String,AssetFactory> configuration,
                         SymbolSource symbolSource,
                         org.slf4j.Logger logger,
                         OperationTracker tracker)

    - #### AssetSourceImpl

          public AssetSourceImpl(ThreadLocale threadLocale,
                         Map<String,AssetFactory> configuration,
                         SymbolSource symbolSource,
                         org.slf4j.Logger logger,
                         OperationTracker tracker,
                         Request request)

  - ### Method Detail

    - #### clearCacheWhenResourcesChange

          @PostInjection
          public void clearCacheWhenResourcesChange(ResourceChangeTracker tracker)

    - #### getClasspathAsset

          public Asset getClasspathAsset(String path)

      Description copied from interface: `AssetSource`
      Obtains a classpath asset in the current locale (as defined by the `ThreadLocale` service).
      Specified by:
        `getClasspathAsset` in interface `AssetSource`
      Parameters:
        `path` - relative to the classpath root
      Returns:
        the asset

    - #### getClasspathAsset

          public Asset getClasspathAsset(String path,
                                Locale locale)

      Description copied from interface: `AssetSource`
      Convenience for finding assets on the classpath.
      Specified by:
        `getClasspathAsset` in interface `AssetSource`
      Parameters:
        `path` - path to the base resource, relative to classpath root
        `locale` - to localize the resource to
      Returns:
        the asset

    - #### getContextAsset

          public Asset getContextAsset(String path,
                              Locale locale)

      Description copied from interface: `AssetSource`
      Convenience for finding assets in the context.
      Specified by:
        `getContextAsset` in interface `AssetSource`
      Parameters:
        `path` - path relative to the base resource (the context root)
        `locale` - to localize the resource to, or null for the locale for the current request
      Returns:
        the asset

    - #### getAsset

          public Asset getAsset(Resource baseResource,
                       String path,
                       Locale locale)

      Description copied from interface: `AssetSource`
      Finds the asset. The path may either be a simple file name or a relative path (relative to the base resource) or it may have a prefix, such as "context:" or "classpath:", in which case it is treated as a complete path within the indicated domain. The resulting Resource is then localized (to the provided Locale) and returned as an Asset.

      The AssetSource caches its results, so a single Asset instance may be shared among many different components.
      Specified by:
        `getAsset` in interface `AssetSource`
      Parameters:
        `baseResource` - base resource for computing relative paths, or null to search the classpath
        `path` - relative to the base resource
        `locale` - locale to localize the final resource to, or null for the thread's current locale
      Returns:
        the asset

    - #### resourceForPath

          public Resource resourceForPath(String path)

      Description copied from interface: `AssetSource`
      Finds the asset, either on the classpath or (if prefixed), within the indicated domain. The result is not localized. The underlying Asset may not exist.
      Specified by:
        `resourceForPath` in interface `AssetSource`
      Parameters:
        `path` - to the resource to provide as an Asset
      Returns:
        Resource for the path (the Resource may not exist)

    - #### getExpandedAsset

          public Asset getExpandedAsset(String path)

      Description copied from interface: `AssetSource`
      As with `AssetSource.getUnlocalizedAsset(String)`, but symbols in the path are expanded}.
      Specified by:
        `getExpandedAsset` in interface `AssetSource`

    - #### getComponentAsset

          public Asset getComponentAsset(ComponentResources resources,
                                String path,
                                String libraryName)

      Description copied from interface: `AssetSource`
      Gets an asset that is used with, or injected into, a component, that will be exposed to the client. This encapsulates the new, in 5.4, standard that assets should all be stored in (sub-folders of) `META-INF/assets/library-name/`. This is the preferred location in 5.4, with compatibility for 5.3 that allows assets to be stored on the classpath alongside Java classes and server-only resources such as templates and message catalogs.

      When resolving a resource in a component that is subclass, the point of injection is the class which contains the injecting annotation (e.g., `Inject` with `Path`, or `Import`). In other words, the library name for the library containing the class, rather than the library name of the instantiated subclass (which can be different).
      Specified by:
        `getComponentAsset` in interface `AssetSource`
      Parameters:
        `resources` - resources, used to identify starting location of asset (if path does not include a asset prefix).
        `path` - path to the resource; either fully qualified (with an asset prefix such as "context:"), or relative to the component's library asset folder (the 5.4 and beyond way), or the to the component's Java class file (the 5.3 and earlier way, still supported until at least 5.5). Symbols in the path are expanded.
        `libraryName` - The name of the library containing the component, as per `ComponentModel.getLibraryName()`. For a subclass, the libraryName must reflect the name of the library for the parent class that forms the basis of injection.
      Returns:
        the Asset

    - #### getUnlocalizedAsset

          public Asset getUnlocalizedAsset(String path)

      Description copied from interface: `AssetSource`
      Find an asset but does not attempt to localize it. If the path has no prefix, it is assumed to be on the classpath.
      Specified by:
        `getUnlocalizedAsset` in interface `AssetSource`

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