Gallery for each article using hibernate

[o1550762 <o1...@rtrtr.com>]

Hi! 
I want to implement gallery for each article using hibernate, and how many
images per article should it have is not mandatory set by some value? I am
here for your opinion what is the best way to implement it, so any help is
greatly appreciated. Thanks in advance. :)



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Re: Gallery for each article using hibernate

[Lance Java <la...@googlemail.com>]

Rather than tying yourself to hibernate, your gallery component should accept
a parameter of type AssetProvider (or similar name)

public interface AssetProvider {
   public List<Asset> getAssets(int startIndex, int maxResults);
   public int getAssetCount();
}

I'd probably wrap the component in a zone and use eventlinks for forward and
back which passed the page number in the event.

public class Gallery {
   @Inject
   private Zone galleryZone;

   @Parameter(required=true)
   private int itemsPerPage;

   @Parameter(required=true)
   private AssetProvider assetProvider;

   @Property
   private int currentPage;

   public void onPageChange(int page) {
      this.currentPage = currentPage;
      return galleryZone.getBody();
   }

   public List<Assets> getAssets() {
      int startIndex = itemsPerPage * currentPage;
      return assetProvider.getAssets(startIndex, itemsPerPage);
   }

   public boolean isShowNext() {
      // not tested ;)
      return assetProvider.getAssetCount() < (itemsPerPage * currentPage);
   }

   public boolean isShowPrev() {
      return currentPage > 0;
   }
}

<t:zone id="galleryZone">
   <t:loop source="assets" value="asset">
       <${asset}> 
   </t:loop>
   <t:if test="showPrev">
      <t:eventlink event="pageChange" zone="galleryZone"
context="${currentPage - 1}">Prev</t:eventlink>
   </t:if>
   <t:if test="showNext">
      <t:eventlink event="pageChange" zone="galleryZone"
context="${currentPage + 1}">Next</t:eventlink>
   </t:if>
</t:zone>



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Re: Gallery for each article using hibernate

[o1550762 <o1...@rtrtr.com>]

Thanks for the answers. I have chosen to go for LanceJava's solution, but
kcollasi code is very helpful and has contributed me greatly for better
understanding how Tapestry works. :)



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