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.tests/test/org/eclipse/birt/report/model/api/ReportItemHandleTest.java
ComputedColumnHandle columnHandle2 = (ComputedColumnHandle) iter1
				.next( );
		assertEquals( "new column2", columnHandle2.getName( ) ); 
		try
		{
			columnHandle2.setName( "new column1" ); 
			fail( );
		}
		catch ( SemanticException e )
		{
			assertEquals( PropertyValueException.DESIGN_EXCEPTION_VALUE_EXISTS,
					e.getErrorCode( ) );
		}
		columnHandle2.setName( "new column3" ); 
		assertEquals( "new column3", columnHandle2.getName( ) ); 
		
		columnHandle2.setName( "table1.column3" ); 
		assertEquals( "table1.column3", columnHandle2.getName( ) ); 
	}
	/**
	 * Tests the function for adding bound data columns.
	 * 
	 * @throws Exception
	 */
	public void testDataBindingRef( ) throws Exception
	{
		openDesign( "ReportItemHandleTest_2.xml" );  
		DataItemHandle data1 = (DataItemHandle) designHandle
				.findElement( "myData1" ); 
		Iterator columns = data1.columnBindingsIterator( );