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This is the master POM file for Sun's Implementation of the JSF 2.1 Specification.

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package javax.faces.application;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Map;

import javax.faces.context.FacesContext;

/**
 * 

An instance of * Resource is a Java object representation of the artifact * that is served up in response to a resource request from the * client. Instances of Resource are normally created and * initialized via calls to {@link ResourceHandler#createResource}. See * the documentation for {@link ResourceHandler} for more * information.

* *
*
* * @since 2.0 */ public abstract class Resource { /** *

This constant is used as the key in the * component attribute map of a composite component to associate * the component with its Resource instance. The * value for this key is the actual Resource instance.

* */ public static final String COMPONENT_RESOURCE_KEY = "javax.faces.application.Resource.ComponentResource"; private String contentType; private String libraryName; private String resourceName; // ---------------------------------------------------------- Public Methods /** *

Return the MIME content-type for this resource.

* @return the MIME content-type for this resource. */ public String getContentType() { return contentType; } /** *

Set the MIME content-type for this * resource. The default implementation performs no validation on * the argument.

* @param contentType the MIME content-type for this resource. The * default implementation must accept null as a * parameter. */ public void setContentType(String contentType) { this.contentType = contentType; } /** *

Return the libraryName for this * resource. May be null. The libraryName for a * resource is an optional String that indicates membership in a * "resource library". All resources with the same libraryName * belong to the same "resource library". The "resource library" * concept allows disambiguating resources that have the same * resourceName. See {@link ResourceHandler} for more * information.

* * @return Return the libraryName for this resource. May be * null. */ public String getLibraryName() { return libraryName; } /** *

Set the libraryName for this resource.

* @param libraryName the libraryName for this resource. The * default implementation must accept null for the * libraryName. */ public void setLibraryName(String libraryName) { this.libraryName = libraryName; } /** *

Return the resourceName for this resource. * Will never be null. All Resource instances must * have a resourceName.

* @return Return the resourceName for this resource. Will never be * null. */ public String getResourceName() { return resourceName; } /** *

Set the resourceName for this resource.

* @param resourceName a non-null String. * * @throws NullPointerException if argument * resourceName is null. */ public void setResourceName(String resourceName) { if (null == resourceName) { throw new NullPointerException("PENDING_I18N: All resources must have a non-null resourceName."); } this.resourceName = resourceName; } /** *

If the current request is a resource * request, (that is, {@link ResourceHandler#isResourceRequest} * returns true), return an InputStream * containing the bytes of the resource. Otherwise, throw an * IOException.

* @return an InputStream containing the bytes of the * resource.

* *

Any EL expressions present in the * resource must be evaluated before serving the bytes of the * resource. Note that due to browser and server caching, EL * expressions in a resource file will generally only be evaluated * once, when the resource is first served up. Therefore, using EL * expressions that refer to per-request data is not advisable since * this data can become stale.

* * @throws IOException if the current request is not a resource request. */ public abstract InputStream getInputStream() throws IOException; /** *

Returns a mutable * Map<String, String> whose entries will be sent * as response headers during {@link * ResourceHandler#handleResourceRequest}. The entries in this map * must not persist beyond the scope of a single request. Any * modifications made to the map after the resource has been served * will be ignored by the run-time.

* * @return a mutable Map<String, String> of * headers that will be included with the response. */ public abstract Map getResponseHeaders(); /** *

Return a path to this resource such * that, when the browser resolves it against the base URI for the * view that includes the resource, and issues a GET request to the * resultant fully qualified URL, the bytes of the resource are * returned in response.

* *
* *

The default implementation must * implement the following algorithm. For discussion, the return * result from this method will be called result.

* *
    * *
  • Get the context-root for this web application, not ending * in slash. For discussion this will be caled * contextRoot.

  • * *
  • Discover if the FacesServlet is prefix or * extension mapped, and the value of the mapping (including the * leading '.' in the case of extension mapping). For discussion, * this will be facesServletMapping.

    * *

    If prefix mapped, result must be

    * *

      result = contextRoot + '/' + * facesServletMapping + {@link * ResourceHandler#RESOURCE_IDENTIFIER} + '/' + {@link * #getResourceName}

    * *

    If extension mapped, result must be

    * *

      result = contextRoot + {@link * ResourceHandler#RESOURCE_IDENTIFIER} + {@link #getResourceName} + * facesServletMapping

    * *
  • * *
  • If {@link #getLibraryName} returns non-null, * build up a string, called resourceMetaData for * discussion, as follows:

    * *
      * *

      resourceMetaData = "?ln=" + {@link * #getLibraryName}

      * *
    * *

    Append resourceMetaData to result.

    * *
  • * *
  • Make it portlet safe by passing the result through {@link * ViewHandler#getResourceURL}.

  • * *
* *
* * @return the path to this resource, intended to be included in the * encoded view that is sent to the browser when sending a faces * response. */ public abstract String getRequestPath(); /** *

Return an actual URL * instance that refers to this resource instance.

* * @return Return an actual URL instance that refers to * this resource instance. */ public abstract URL getURL(); /** *

Call through to {@link * #getRequestPath} and return the result.

* * @return Call through to {@link #getRequestPath} and return the * result. */ public String toString() { return getRequestPath(); } /** *

Return true if the * user-agent requesting this resource needs an update. Returns * false otherwise. * * @return true or false depending on * whether or not the user-agent needs an update of this resource. */ public abstract boolean userAgentNeedsUpdate(FacesContext context); }





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