Bug 124067 When select the XML file, the relative path should be supported.
Description: When select the XML file, the relative path should be supported. Step to reproduce: 1. new a report 2. new a datasource and dataset based on a XML file 3. select the XML file, the file relative path should be used. Actual result: only the absolute path is supported. Expect result: the relative and absolute path are supported.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
IScriptDataSourceDesign newScriptDataSource( ScriptDataSourceHandle source )
	{
		ScriptDataSourceDesign dteSource = new ScriptDataSourceDesign( source
				.getQualifiedName( ) );
		IScriptDataSourceEventHandler eventHandler = new ScriptDataSourceScriptExecutor(
				source, context );
		dteSource.setEventHandler( eventHandler );
		
		adaptBaseDataSource( source, dteSource );
		
		dteSource.setOpenScript( source.getOpen( ) );
		dteSource.setCloseScript( source.getClose( ) );
		return dteSource;
	}
	void adaptBaseDataSource( DataSourceHandle source, BaseDataSourceDesign dest )
	{
		dest.setBeforeOpenScript( source.getBeforeOpen( ) );
		dest.setAfterOpenScript( source.getAfterOpen( ) );
		dest.setBeforeCloseScript( source.getBeforeClose( ) );
		dest.setAfterCloseScript( source.getAfterClose( ) );
	}
	IOdaDataSetDesign newExtendedDataSet( OdaDataSetHandle modelDataSet,
			ExecutionContext context ) throws BirtException
	{
		OdaDataSetDesign dteDataSet = new OdaDataSetDesign( modelDataSet
				.getQualifiedName( ) );
		IBaseDataSetEventHandler eventHandler = new DataSetScriptExecutor(
				modelDataSet, context );
		dteDataSet.setEventHandler( eventHandler );