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
PropertyHandle propHandle = getPropertyHandle( IReportItemModel.VISIBILITY_PROP );
		if ( propHandle == null )
			return Collections.EMPTY_LIST.iterator( );
		return propHandle.iterator( );
	}
	/**
	 * Returns the script executed when the element is created in the Factory.
	 * Called after the item is created, but before the item is saved to the
	 * report document file.
	 * 
	 * @return the script that executes
	 */
	public String getOnCreate( )
	{
		return getStringProperty( IReportItemModel.ON_CREATE_METHOD );
	}
	/**
	 * Sets the script executed when the element is created in the Factory.
	 * Called after the item is created, but before the item is saved to the
	 * report document file.
	 * 
	 * @param value
	 *            the script to set
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setOnCreate( String value ) throws SemanticException
	{
		setProperty( IReportItemModel.ON_CREATE_METHOD, value );
	}