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https://jira.jboss.org/browse/JBSEAM-4672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12544262#action_12544262
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Edward bai commented on JBSEAM-4672:
------------------------------------
Now I use this function to resolve this question.
<s:graphicImage rendered="#{breedHome.checkPicture()}" value="#{...}">
public boolean checkPicture(){
if( instance.getPicture()!=null){
return instance.getPicture().length>0;
}else{
return false;
}
}
> s:graphicImage in rich:extendedDataTable - using byte array datasource
> results in wrong drawing
> -----------------------------------------------------------------------------------------------
>
> Key: JBSEAM-4672
> URL: https://jira.jboss.org/browse/JBSEAM-4672
> Project: Seam
> Issue Type: Bug
> Components: JSF Controls
> Affects Versions: 2.2.0.GA
> Environment: JDK 1.6.0 Update 18, Windows XP SP3, JBoss 4.2.2.GA,
> Oracle 10g express,
> Reporter: Helge Mahrt
>
> I am using the s:graphicImage in a rich:column within a
> rich:extendedDataTable:
> <rich:extendedDataTable id="languageDataTable" value="#{dtoList}" var="item" >
> <rich:column sortable="false">
> <s:graphicImage value="#{item.imageData}"/>
> [...]
> </rich:column>
> </rich:extendedDataTable>
> imageData is a byte array which is bound to a BLOB in the database. Not all
> objects in the database have an image, in fact most have null in the image
> field.
> After encountering the first row, where the object behind does have an image,
> s:graphicImage keeps drawing this very image in every subsequent row, until
> it encounters another object with the image set. Per default imageData
> returned a byte array of 0 size when there is no image in the database. I
> tried replacing that value by null, but the behaviour did not change.
> There are no errors or execeptions showing up. I think s:imageData, when
> using byte arrays as source, is not properly reacting to invalid/null image
> data.
> As a work-around I used the rendered attribute to hide the s:graphicImage
> control when there is no image data.
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