Re: tag to truncate outputText?

[Gary VanMatre]

>From: "Lindholm, Greg" <[EMAIL PROTECTED]>
>
> Is there a way to truncate outputText and specify the size
> you want from a jsp page?
>
> I have an object with a long description property.
> When it's listed in a dataTable I want to truncate the
> description column to X characters.
> Where X can be specified for that column.
>
> I know I can add a getTruncatedDescription() method to the
> object but I think a more general facility would be
> really useful.
>
> Does anybody have a way or doing this with current tags?
>
> Is this something that could be done with a converter?
>
> Is this something that could be added to ?
>

Sure.  How about something like this:

JSP:

  <h:dataTable value="#{mybean.data}" var="e">
  <h:column>
    <h:outputText binding="#{mybean.output}" value="#{e.chapter}"/>
  </h:column>
 </h:dataTable>

Custom Converter:

public class TrunkConverter implements Converter {

    private int maximumSize = -1;
   

    public int getMaximumSize() {
        return maximumSize;
    }
   
    public void setMaximumSize(int maximumSize) {
        this.maximumSize = maximumSize;
    }
   
    public Object getAsObject(FacesContext context, UIComponent component, String value) throws ConverterException {
        return value;
    }

    public String getAsString(FacesContext context, UIComponent component, Object value) throws ConverterException {
        StringBuffer buff = new StringBuffer();
        buff.append(value);
        buff.setLength(maximumSize);
       
        return buff.toString();
    }
       
}

Backing Bean:

    private HtmlOutputText output = null;
    public HtmlOutputText getOutput() {
        if (output == null) {
            output = new HtmlOutputText();   
            FacesContext context = FacesContext.getCurrentInstance();
            context.getApplication().addConverter("com.acme.TrunkConverter", "com.acme.TrunkConverter");
            TrunkConverter converter = (TrunkConverter) context.getApplication().createConverter("com.acme.TrunkConverter");
            converter.setMaximumSize(5);
            output.setConverter(converter); &n bsp;          
        }
       
        return output;
    }
    public void setOutput(HtmlOutputText output) {
       this.output = output;   
    }

 

 

 

>

 

Gary