topic Re: Custom service, using alfresco java api in Alfresco Archive

Custom service, using alfresco java api

frankb — Wed, 23 Feb 2011 11:41:26 GMT

Hello,Im currently creating a custom service which returns the data as a nested list, which can be used in Sencha Touch.I'm struggling to find out two things.1: How can I find the "iconURL" and retrieve it? serviceRegistry.getNodeService().getProperty(file.getNodeRef(), ApplicationModel.PROP_ICON)‍r

Re: Custom service, using alfresco java api

frankb — Wed, 23 Feb 2011 13:58:26 GMT

Anyone? any help would be much appreciated.

Re: Custom service, using alfresco java api

mdavid_cu — Sat, 26 Feb 2011 21:11:14 GMT

Hello frankb,
This method was tested with Alfresco 3.0 labs but I guess that it is compatible with your current version, I hope this help

public String getDownloadURL(NodeRef nodeRef){
      DictionaryService dictionaryService = serviceRegistry.getDictionaryService();
      NodeService nodeService = serviceRegistry.getNodeService();
      boolean isDocument = dictionaryService.isSubClass(nodeService.getType(nodeRef), ContentModel.TYPE_CONTENT);
      
      if(!isDocument)
         throw new AlfrescoRuntimeException("The node is a cm:content subclass");
      
      return "/alfresco/service/api/node/content/" + nodeRef.getStoreRef().getProtocol() + "/"
      + nodeRef.getStoreRef().getProtocol() + "/" + nodeRef.getId();
   }
   
   public String getIconURL(NodeRef nodeRef, boolean small){
      DictionaryService dictionaryService = serviceRegistry.getDictionaryService();
      NodeService nodeService = serviceRegistry.getNodeService();
      boolean isDocument = dictionaryService.isSubClass(nodeService.getType(nodeRef), ContentModel.TYPE_CONTENT);
      if(isDocument){
         return FileTypeImageUtils.getFileTypeImage((String) nodeService.getProperty(nodeRef, ContentModel.PROP_NAME), small);
      } else { //the node is subtype of folder
         return "/images/icons/"   + nodeService.getProperty(nodeRef, ApplicationModel.PROP_ICON)   + (small ? "-16" : "") + ".gif";
      }
   }  ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Custom service, using alfresco java api

mdavid_cu — Sat, 26 Feb 2011 21:45:12 GMT

Hello frankb,

      The method FileTypeImageUtils.getFileTypeImage(String fileName, boolean small)
      has a dependency with de FacesContext instance, so you must call the REST service by instantiating the faces context,
      an Example:
       your service url must be: http://localhost:8080/alfresco/faces/service/api/node/workspace/SpacesStore/9d0f9136-ca36-49c3-8bdc-41020b465b3e

Re: Custom service, using alfresco java api

frankb — Mon, 28 Feb 2011 13:36:42 GMT

Thanks for your reply!!

But I dont quite understand the last bit, about the facescontext. Could you explain this a bit further?

Frank

Re: Custom service, using alfresco java api

mdavid_cu — Wed, 02 Mar 2011 19:31:32 GMT

Hello Frank,
The method org.alfresco.repo.web.scripts.FileTypeImageUtils.getFileTypeImage(String fileName, boolean small) internally makes a call to this other static method in the same class:

 private static String getFileTypeImage(FacesContext fc, ServletContext sc, String name, FileTypeImageSize size)
    {
       String image = null;
       String defaultImage = null;
       switch (size)
       {
          case Small:
             defaultImage = DEFAULT_FILE_IMAGE16; break;
          case Medium:
             defaultImage = DEFAULT_FILE_IMAGE32; break;
          case Large:
             defaultImage = DEFAULT_FILE_IMAGE64; break;
       }
       
       int extIndex = name.lastIndexOf('.');
       if (extIndex != -1 && name.length() > extIndex + 1)
       {
          String ext = name.substring(extIndex + 1).toLowerCase();
          String key = ext + ' ' + size.toString();
          
          // found file extension for appropriate size image
          synchronized (s_fileExtensionMap)
          {
             image = s_fileExtensionMap.get(key);
             if (image == null)
             {
                // not found create for first time
                if (size != FileTypeImageSize.Large)
                {
                   image = (size == FileTypeImageSize.Small ? IMAGE_PREFIX16 : IMAGE_PREFIX32) +
                            ext + IMAGE_POSTFIX_GIF;
                }
                else
                {
                   image = IMAGE_PREFIX64 + ext + IMAGE_POSTFIX_PNG;
                }
                
                // does this image exist on the web-server?
                if ((fc != null && fc.getExternalContext().getResourceAsStream(image) != null) ||
                    (sc != null && sc.getResourceAsStream(image) != null))
                {
                   // found the image for this extension - save it for later
                   s_fileExtensionMap.put(key, image);
                }
                else if ((fc == null) && (sc == null))
                {
                   // we have neither FacesContext nor ServerContext so return the default image but don't cache it
                   image = defaultImage;
                }
                else
                {
                   // not found, save the default image for this extension instead
                   s_fileExtensionMap.put(key, defaultImage);
                   image = defaultImage;
                }
             }
          }
       }
       
       return (image != null ? image : defaultImage);
    }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

You can see, the dependency of the FacesContext and ServletContext, which are helpful for searching the right .gif or .png for the node name, but if both contexts are null, you'll always get a defaultImage, cause the searching can't be executed. By default the facesContext is initialized with the URI: http://localhost:8080/alfresco/faces/…, so you can resolve the problem, by executing this URI