public static Map<String, QueryParameter> intersectParametersMap(List<Report> reports) {
    	Map<String, QueryParameter> map = new LinkedHashMap<String, QueryParameter>();
    	if ((reports == null) || (reports.size() == 0)) {
    		return map;
    	}
    	if (reports.size() == 1) {
    		return getUsedParametersMap(reports.get(0), false, false);
    	}    	
    	Map<String, QueryParameter> firstParamMap = getUsedParametersMap(reports.get(0), false, false);  
    	Map<String, QueryParameter> secondParamMap = getUsedParametersMap(reports.get(1), false, false);
        map = intersectParametersMap(firstParamMap, secondParamMap);
        
        for (int i=2, n=reports.size(); i<n; i++) {
        	Map<String, QueryParameter> paramMap = getUsedParametersMap(reports.get(i), false, false);
        	map = intersectParametersMap(map, paramMap);
        	if (map.size() == 0) {
        		break;
        	}
        }
        return map;
    }
public static Map < String , QueryParameter > intersectParametersMap ( List < Report > reports ) { Map < String , QueryParameter > map = new LinkedHashMap < String , QueryParameter > ( ) ; if ( ( reports == null ) || ( reports . size ( ) == 0 ) ) { return map ; } if ( reports . size ( ) == 1 ) { return getUsedParametersMap ( reports . get ( 0 ) , false , false ) ; } Map < String , QueryParameter > firstParamMap = getUsedParametersMap ( reports . get ( 0 ) , false , false ) ; Map < String , QueryParameter > secondParamMap = getUsedParametersMap ( reports . get ( 1 ) , false , false ) ; map = intersectParametersMap ( firstParamMap , secondParamMap ) ; for ( int i = 2 , n = reports . size ( ) ; i < n ; i ++ ) { Map < String , QueryParameter > paramMap = getUsedParametersMap ( reports . get ( i ) , false , false ) ; map = intersectParametersMap ( map , paramMap ) ; if ( map . size ( ) == 0 ) { break ; } } return map ; }
Get a map with all the identical parameters for a list of reports

@param reports list of reports
@return a map with all the identical parameters for a list of reports
see QueryParameter.compare(Object o)