Bug 201235 Display text from multi-select parameter is wrong.[0705][0002]
Description: Display text from multi-select parameter is wrong. Build number:2.2.1.v20070827 Steps to reproduce: 1. 1. New a report parameter p1, listbox. 2. Add values like DisplayText/Value v1/1 v2/2. 3. Insert a data item to Layout, Input expression as params["p1"].displayText[0] 4. Preview and select one value, click OK. Expected result: For multi-select parameter, return null for display text or some correct value. Actual result: Display "v" Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/BirtUtility.java
* @param request
	 * @return Map
	 */
	public static Map getDisplayTexts( Collection parameters, Map displayTexts,
			HttpServletRequest request )
	{
		if ( displayTexts == null )
			displayTexts = new HashMap( );
		Enumeration params = request.getParameterNames( );
		while ( params != null && params.hasMoreElements( ) )
		{
			String param = DataUtil.getString( params.nextElement( ) );
			String paramName = ParameterAccessor.isDisplayText( param );
			if ( paramName != null )
			{
				ParameterDefinition parameter = findParameterDefinition(
						parameters, paramName );
				
				
				if ( parameter != null && !parameter.isMultiValue( ) )
					displayTexts.put( paramName, ParameterAccessor
							.getParameter( request, param ) );
			}
		}
		return displayTexts;
	}
	/**
	 * Get locale parameter list
	 * 
	 * @param locParams