Bug 201038 The joint dataset from library can not be used and exception occurs when preview in dataset[07]
Description: The joint dataset from library can not be used and exception occurs when preview in dataset[07] Build number: 2.2.1.v20070824-0630 Steps to reproduce: 1, New a library and create two datasets ds1 and ds2 2, Creata a joint dataset ds3 using ds1 and ds2 3, Publish the library 4, New a report and using the Joint dataset and preview in joint dataset Expected result: The preview should be successful Actual result: Exception occurs Error log: java.lang.ClassCastException: org.eclipse.birt.report.model.metadata.ElementRefValue at org.eclipse.birt.report.model.command.AbstractPropertyCommand.setupStructureContext(AbstractPropertyCommand.java:534) at org.eclipse.birt.report.model.command.AbstractPropertyCommand.makeLocalCompositeValue(AbstractPropertyCommand.java:440) at org.eclipse.birt.report.model.command.ComplexPropertyCommand.doRemoveItem(ComplexPropertyCommand.java:456) at org.eclipse.birt.report.model.command.ComplexPropertyCommand.removeItem(ComplexPropertyCommand.java:393) at org.eclipse.birt.report.model.api.PropertyHandle.removeItem(PropertyHandle.java:317) at org.eclipse.birt.report.model.api.SimpleValueHandle.removeItem(SimpleValueHandle.java:453) at org.eclipse.birt.report.model.api.JointDataSetHandle.removeDataSet(JointDataSetHandle.java:128) at org.eclipse.birt.report.designer.data.ui.dataset.JointDataSetPage.modifyJointCondition(JointDataSetPage.java:989) at org.eclipse.birt.report.designer.data.ui.dataset.JointDataSetPage.canLeave(JointDataSetPage.java:963) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.showPage(AbstractPropertyDialog.java:554) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.showSelectionPage(AbstractPropertyDialog.java:467) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.showSelectionPage(DataSetEditor.java:820) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog$3.run(AbstractPropertyDialog.java:425)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/AbstractPropertyCommand.java
}
		}
	}
	/**
	 * Adjusts references to a structure that is to be deleted. The structure to
	 * be deleted is one that has references in the form of structure reference
	 * properties on other elements. These other elements, called "clients",
	 * each contain a property of type structure reference and that property
	 * refers to this structure. Each reference is recorded with a "back
	 * pointer" from the referenced structure to the client. That back pointer
	 * has both a pointer to the client element, and the property within that
	 * element that holds the reference. The reference property is unresolved.
	 * 
	 * @param struct
	 *            the structure to be deleted
	 */
	protected void adjustReferenceClients( ReferencableStructure struct )
	{
		assert struct != null;
		if ( !struct.hasReferences( ) )
			return;
		List clients = new ArrayList( struct.getClientList( ) );
		Iterator iter = clients.iterator( );
		while ( iter.hasNext( ) )
		{
			BackRef ref = (BackRef) iter.next( );
			DesignElement client = ref.getElement( );
			BackRefRecord record = new StructBackRefRecord( module, struct,
					client, ref.getPropertyName( ) );
			getActivityStack( ).execute( record );