Bug 200812 Issue when remove one separator setting in viewer.property[0002]
Description: Issue when remove one separator setting in viewer.property Build number:2.2.1.v200708220927 Steps to reproduce: 1. Deploy birt. 2. Open viewer.properties under WEB-INF folder. 3. Delete "viewer.sep.0=," line 4. Start server. 5. Preview report. 6. Export Data, select columns and select "Comma(,)", click OK. Expected result: Comma(,) isn't in the separator list. Actual result: Nothing happened after step6 and no error logs. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
{
				if ( canWrite && new File( realPath ).canWrite( ) )
					return realPath;
			}
			catch ( Exception e )
			{
			}
		}
		
		if ( isRelative )
		{
			realPath = DataUtil.trimSepEnd( System
					.getProperty( "java.io.tmpdir" ) ) + path; 
		}
		else
		{
			
			if ( defaultPath != null )
				realPath = DataUtil.trimSepEnd( System
						.getProperty( "java.io.tmpdir" ) ) + File.separator + defaultPath; 
		}
		
		makeDir( realPath );
		return realPath;
	}
	/**
	 * Returns real path relative to context
	 * 
	 * @param path
	 * @param context