Bug 128166 the xml data can be displayed incorrectly
Description: the xml data can be displayed incorrectly Steps to reproduce: 1. import the attached report design file. 2. set a table mapping as '//Book' 3. add a column mapping '../@location' 4. save and preview. Actual result: the 'Sunderland' is displayed Expect result: the 'Paris' is displayed
data/org.eclipse.birt.report.data.oda.xml/src/org/eclipse/birt/report/data/oda/xml/util/SaxParserConsumer.java
* Update column info of all columns according to the given root path.
	 * 
	 * @param currentRootPath
	 */
	void upDateColumnInfos( String currentRootPath )
	{
		for( int i = 0; i < simpleNestedXMLColumns.length; i++ )
		{
			if( !SaxParserUtil.isValidNestedXMLColumnPath( simpleNestedXMLColumns[i].getColumnPath( ), currentRootPath, simpleNestedXMLColumns[i].getColumnBackRef( )))
				simpleNestedXMLColumns[i].update( simpleNestedXMLColumns[i].getColumnPath( ), null );
		}
		
	}
	
	/**
	 * Return the current column path of certain column.
	 * 
	 * @param columnName
	 * @return
	 */
	String getPath( String columnName )
	{
		 SimpleNestedXMLColumn column = findColumn( columnName );
		 if( column != null )
		 {
			return column.getColumnPath( );
		 }
		 return null;
	}