Examples of org.apache.wicket.Resource

org.apache.wicket.Resource
A Resource is something that implements IResourceListener and provides a getResourceStream() method which returns the raw IResourceStream to be rendered back to the client browser.
Resources themselves do not currently have URLs. Instead, they are referred to by components that have URLs.
Resources can be shared throughout an application by adding them to Application with addResource(Class scope, String name) or addResource(String name). A resource added in such a way is a named resource and is accessible throughout the application via Application.getResource(Class scope, String name) or Application.getResource(String name). The ResourceReference class enables easy access to such resources in a way that is light on clusters.
While resources can be shared between components, it is important to emphasize that components cannot be shared among containers. For example, you can create a button image resource with new DefaultButtonImageResource(...) and store that in the Application with addResource(). You can then assign that logical resource via ResourceReference to several ImageButton components. While the button image resource can be shared between components like this, the ImageButton components in this example are like all other components in Wicket and cannot be shared. @author Jonathan Locke @author Johan Compagner @author Gili Tzabari @author Igor Vaynberg

  protected final void onComponentTag(final ComponentTag tag)
  {
    checkComponentTag(tag, "input");
    checkComponentTagAttribute(tag, "type", "image");


    final Resource resource = getImageResource();
    if (resource != null)
    {
      localizedImageResource.setResource(resource);
    }
    final ResourceReference resourceReference = getImageResourceReference();

View Full Code Here

   */
  protected void onComponentTag(final ComponentTag tag)
  {
    checkComponentTag(tag, "img");
    super.onComponentTag(tag);
    final Resource resource = getImageResource();
    if (resource != null)
    {
      localizedImageResource.setResource(resource);
    }
    final ResourceReference resourceReference = getImageResourceReference();

View Full Code Here

  public void respond(RequestCycle requestCycle)
  {
    Application application = requestCycle.getApplication();
    SharedResources sharedResources = application.getSharedResources();
    final String resourceKey = getRequestParameters().getResourceKey();
    Resource resource = sharedResources.get(resourceKey);


    // try to lazily register
    if (resource == null)
    {
      int ix = resourceKey.indexOf('/');
      if (ix != -1)
      {
        String className = resourceKey.substring(0, ix);
        IClassResolver resolver = application.getApplicationSettings().getClassResolver();
        Class scope = null;
        try
        {
          // First try to match mounted resources.
          scope = Application.get().getSharedResources().getAliasClass(className);


          // If that fails, resolve it as a fully qualified class
          // name.
          if (scope == null)
          {
            scope = resolver.resolveClass(className);
          }
          String path = resourceKey.substring(ix + 1);


          PackageResource packageResource = PackageResource.get(scope, path);
          if (sharedResources.get(resourceKey) == null)
          {
            sharedResources.add(resourceKey, packageResource);
          }
          resource = packageResource;
        }
        catch (Exception e)
        {
          // besides logging, ignore exception; after this an error
          // will be returned that the resource could not be retrieved
          log.error("unable to lazily register shared resource " + resourceKey, e);
        }
      }
    }


    // if resource is still null, it doesn't exist
    if (resource == null)
    {
      Response response = requestCycle.getResponse();
      if (response instanceof WebResponse)
      {
        ((WebResponse)response).getHttpServletResponse().setStatus(
            HttpServletResponse.SC_NOT_FOUND);
        log.error("shared resource " + resourceKey + " not found");
        return;
      }
      else
      {
        throw new WicketRuntimeException("shared resource " + resourceKey + " not found");
      }
    }


    // set request parameters if there are any
    if (requestParameters != null)
    {
      resource.setParameters(requestParameters.getParameters());
    }


    // let the resource handle the request
    resource.onResourceRequested();
  }

View Full Code Here

  }


  public void testInvalidPackageResource() throws Exception
  {
    final SharedResources sharedResources = Application.get().getSharedResources();
    Resource invalidResource = new PackageResource(PackageResourceTest.class, "packaged3.txt",
        Locale.ENGLISH, null);
    assertNotNull(
        "resource packaged3.txt SHOULD be available as a packaged resource even if it doesn't exist",
        invalidResource);


    try
    {
      invalidResource.getResourceStream();
      fail("Should have raised an AbortException");
    }
    catch (AbortException e)
    {
    }

View Full Code Here

  public ResourceReference resourceReference(final Map variables)
  {
    final String uniqueName = sharedResourceName(variables);
    final String templateValue = template.asString(variables);
    final SharedResources sharedResources = Application.get().getSharedResources();
    final Resource resource = sharedResources.get(uniqueName);
    if (resource == null)
    {
      final Resource newResource = new Resource()
      {
        private static final long serialVersionUID = 1L;


        /**
         * @see org.apache.wicket.Resource#getResourceStream()

View Full Code Here

    if (pathInfo.startsWith(WebRequestCodingStrategy.RESOURCES_PATH_PREFIX))
    {


      final String resourceReferenceKey = pathInfo.substring(WebRequestCodingStrategy.RESOURCES_PATH_PREFIX.length());


      Resource resource = null;


      boolean externalCall = !Application.exists();
      try
      {
        // if called externally (i.e. WicketServlet) we need to set the thread local here
        // AND clean it up at the end of the request
        if (externalCall)
        {
          Application.set(webApplication);
        }


        // Try to find shared resource
        resource = webApplication.getSharedResources().get(resourceReferenceKey);


        // If resource found and it is cacheable
        if ((resource != null) && resource.isCacheable())
        {


          final WebRequest request = webApplication.newWebRequest(servletRequest);
          // make the session available.
          Session.findOrCreate(request, new WebResponse());




          // Set parameters from servlet request
          resource.setParameters(request.getParameterMap());


          // Get resource stream
          IResourceStream stream = resource.getResourceStream();


          // Get last modified time from stream
          Time time = stream.lastModifiedTime();


          try
          {
            stream.close();
          }
          catch (IOException e)
          {
            // ignore
          }


          return time != null ? time.getMilliseconds() : -1;
        }
      }
      catch (AbortException e)
      {
        return -1;
      }
      finally
      {
        if (resource != null)
        {
          resource.setParameters(null);
        }
        if (externalCall)
        {
          // Clean up thread local application if this was an external call
          // (if not, doFilter will clean it up)

View Full Code Here

  public void respond(RequestCycle requestCycle)
  {
    Application application = requestCycle.getApplication();
    SharedResources sharedResources = application.getSharedResources();
    final String resourceKey = getRequestParameters().getResourceKey();
    Resource resource = sharedResources.get(resourceKey);


    // try to lazily register
    if (resource == null)
    {
      int ix = resourceKey.indexOf('/');
      if (ix != -1)
      {
        String className = resourceKey.substring(0, ix);
        IClassResolver resolver = application.getApplicationSettings().getClassResolver();
        Class<?> scope = null;
        try
        {
          // First try to match mounted resources.
          scope = Application.get().getSharedResources().getAliasClass(className);


          // If that fails, resolve it as a fully qualified class
          // name.
          if (scope == null)
          {
            scope = resolver.resolveClass(className);
          }


          // get path component of resource key, replace '..' with escape sequence to
          // prevent crippled urls in browser
          final CharSequence escapeString = application.getResourceSettings()
            .getParentFolderPlaceholder();


          String path = resourceKey.substring(ix + 1);
          if (Strings.isEmpty(escapeString) == false)
          {
            path = path.replace(escapeString, "..");
          }


          if (PackageResource.exists(scope, path, null, null, null))
          {
            resource = PackageResource.get(scope, path);
          }
        }
        catch (Exception e)
        {
          // besides logging, ignore exception; after this an error
          // will be returned that the resource could not be retrieved
          log.error("unable to lazily register shared resource " + resourceKey, e);
        }
      }
    }


    // if resource is still null, it doesn't exist
    if (resource == null)
    {
      String msg = "shared resource " + resourceKey + " not found or not allowed access";
      log.info(msg);


      Response response = requestCycle.getResponse();
      if (response instanceof WebResponse)
      {
        ((WebResponse)response).getHttpServletResponse().setStatus(
          HttpServletResponse.SC_NOT_FOUND);
        return;
      }
      else
      {
        throw new WicketRuntimeException(msg);
      }
    }


    // set request parameters if there are any
    if (requestParameters != null)
    {
      resource.setParameters(requestParameters.getParameters());
    }


    // let the resource handle the request
    resource.onResourceRequested();
  }

View Full Code Here

    if (pathInfo.startsWith(WebRequestCodingStrategy.RESOURCES_PATH_PREFIX))
    {


      final String resourceReferenceKey = pathInfo.substring(WebRequestCodingStrategy.RESOURCES_PATH_PREFIX.length());


      Resource resource = null;
      WebRequestCycle requestCycle = null;


      boolean externalCall = !Application.exists();
      try
      {
        // if called externally (i.e. WicketServlet) we need to set the thread local here
        // AND clean it up at the end of the request
        if (externalCall)
        {
          Application.set(webApplication);
        }


        // Try to find shared resource
        resource = webApplication.getSharedResources().get(resourceReferenceKey);


        // If resource found and it is cacheable
        if ((resource != null) && resource.isCacheable())
        {
          // first check the char encoding for getting the parameters
          checkCharacterEncoding(servletRequest);


          final WebRequest request = webApplication.newWebRequest(servletRequest);
          WebResponse response = new WebResponse();
          // create a request cycle if not already there.
          if (RequestCycle.get() == null)
          {
            requestCycle = (WebRequestCycle)webApplication.newRequestCycle(request,
              response);
          }
          // make the session available.
          Session.findOrCreate(request, response);




          // decode the parameters so that shared resource params are also decoded
          // a request cycle is then needed. (see above)
          RequestParameters rp = RequestCycle.get()
            .getProcessor()
            .getRequestCodingStrategy()
            .decode(request);
          // Set parameters from servlet request
          resource.setParameters(rp.getParameters());


          // Get resource stream
          IResourceStream stream = resource.getResourceStream();


          // Get last modified time from stream
          Time time = stream.lastModifiedTime();


          try
          {
            stream.close();
          }
          catch (IOException e)
          {
            // ignore
          }


          return time != null ? time.getMilliseconds() : -1;
        }
      }
      catch (AbortException e)
      {
        return -1;
      }
      finally
      {
        if (resource != null)
        {
          resource.setParameters(null);
        }
        if (externalCall)
        {
          // Clean up thread local application if this was an external call
          // (if not, doFilter will clean it up)

View Full Code Here

  protected final void onComponentTag(final ComponentTag tag)
  {
    checkComponentTag(tag, "input");
    checkComponentTagAttribute(tag, "type", "image");


    final Resource resource = getImageResource();
    if (resource != null)
    {
      localizedImageResource.setResource(resource);
    }
    final ResourceReference resourceReference = getImageResourceReference();

View Full Code Here

  @Override
  protected void onComponentTag(final ComponentTag tag)
  {
    checkComponentTag(tag, "img");
    super.onComponentTag(tag);
    final Resource resource = getImageResource();
    if (resource != null)
    {
      localizedImageResource.setResource(resource);
    }
    final ResourceReference resourceReference = getImageResourceReference();

View Full Code Here

0 1 2 3 4 5 6 7 8

TOP

Related Classes of org.apache.wicket.Resource

org.apache.wicket.extensions.util.resource.TextTemplateSharedResourceFactory

org.apache.wicket.markup.html.form.ImageButton

org.apache.wicket.markup.html.image.Image

org.apache.wicket.markup.html.image.resource.LocalizedImageResource

org.apache.wicket.markup.html.PackageResourceTest

org.apache.wicket.ng.request.cycle.RequestCycle

org.apache.wicket.protocol.http.WebResponse

org.apache.wicket.protocol.http.WicketFilter

org.apache.wicket.request.target.resource.ResourceStreamRequestHandler

org.apache.wicket.request.target.resource.ResourceStreamRequestTarget

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.