DatabaseIdRange.java 文件源码

@Nullable
public static DatabaseIdRange createFromContentProviderResults(ContentProviderResult[] results, String path){
    UriMatcher sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
    sUriMatcher.addURI(MessengerContentProvider.AUTHORITY, path, MATCH_CODE);

    Integer f = null;
    Integer l = null;
    for(ContentProviderResult result : results){
        if(result.uri != null && !result.uri.toString().isEmpty()){
            if(sUriMatcher.match(result.uri) != MATCH_CODE){
                continue;
            }

            int dbid = Integer.parseInt(result.uri.getPathSegments().get(1));
            if(f == null || dbid < f){
                f = dbid;
            }

            if(l == null || dbid > l){
                l = dbid;
            }
        }
    }

    return nonNull(f) && nonNull(l) ? new DatabaseIdRange(f, l) : null;
}