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 ( path == null )
			return path;
		
		Pattern p = Pattern.compile( "\\$\\s*\\{([^\\}]*)\\}\\s*(.*)", 
				Pattern.CASE_INSENSITIVE );
		Matcher m = p.matcher( path );
		if ( m.find( ) )
		{
			String sysPath = DataUtil.trimSepEnd( System.getProperty( m.group(
					1 ).trim( ) ) );
			if ( sysPath.length( ) <= 0 )
				return DataUtil.trimSepFirst( m.group( 2 ).trim( ) );
			else
				return sysPath + m.group( 2 ).trim( );
		}
		return path;
	}
	/**
	 * Process working folder setting. If path is a relative path, first
	 * relative to context.
	 * 
	 * @param context
	 * @param path
	 * @return
	 */
	public static String processWorkingFolder( ServletContext context,
			String path )
	{
		path = convertSystemPath( DataUtil.trimString( path ) );