Bug 185898 ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType.
ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType. The first method provider the available ReportItem list of DataBindingReference. The second method provider the type of the DataBinding.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportItemHandle.java
* Sets the data set of the report item.
	 * 
	 * @param handle
	 *            the handle of the data set
	 * 
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setDataSet( DataSetHandle handle ) throws SemanticException
	{
		if ( handle == null )
			setStringProperty( DATA_SET_PROP, null );
		else
		{
			ModuleHandle moduleHandle = handle.getRoot( );
			String valueToSet = handle.getElement( ).getFullName( );
			if ( moduleHandle instanceof LibraryHandle )
			{
				String namespace = ( (LibraryHandle) moduleHandle )
						.getNamespace( );
				valueToSet = StringUtil.buildQualifiedReference( namespace,
						valueToSet);
			}
			setStringProperty( IReportItemModel.DATA_SET_PROP, valueToSet );
		}
	}
	/**
	 * Gets a handle to deal with the item's x (horizontal) position.
	 * 
	 * @return a DimensionHandle for the item's x position.