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Get Chart in rptdesign file

chris_w

Hi, 
 
I defined a chart which is saved in the rptdesign file for example with id 1. 
 
And now, I would like to read the Chart using the BIRT API. 
 
I read the file with the ReportDesignHandle and used the getElementByID(1) method to retrieve the DesignElement . Thats working. But now, how do I get the chart object itself? Is it possible to cast something? Is that the correct approach itself? 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
...

//open a design or a template
designHandle = session.openDesign("some path");

DesignElementHandle deh = designHandle.getElementByID(1);

DesignElement de = deh.getElement();

// And now something like: Chart chart = (Chart) de.getElement() ????????

</pre>

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Comments

chris_w

Found that way to get the chart from rptdesign file. But is that the common way to use a while loop to do that? 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
// Instantiate a slot handle and iterator for the body slot.
SlotHandle shBody = designHandle.getBody();
Iterator<SlotHandle> slotIterator = shBody.iterator();
// To retrieve top-level report items, iterate over the body.
while (slotIterator.hasNext()) {
Object shContents = slotIterator.next();
if( shContents instanceof ExtendedItemHandle){
String type = ((ExtendedItemHandle)shContents).getExtensionName();
if( type.compareToIgnoreCase("Chart") == 0){
Chart cm = (Chart) ((ExtendedItemHandle) shContents).getReportItem().getProperty( "chart.instance" );
}
}
}
</pre>

mwilliams

You might try something like:

reportContext.getDesignHandle().getElementByID(1).getProperty("chart.instance");