Class FastaReader<S extends Sequence<?>,​C extends Compound>


  • public class FastaReader<S extends Sequence<?>,​C extends Compound>
    extends Object
    Use FastaReaderHelper as an example of how to use this class where FastaReaderHelper should be the primary class used to read Fasta files
    Author:
    Scooter Willis ;lt;willishf at gmail dot com>
    • Constructor Detail

      • FastaReader

        public FastaReader​(InputStream is,
                           SequenceHeaderParserInterface<S,​C> headerParser,
                           SequenceCreatorInterface<C> sequenceCreator)
        If you are going to use FileProxyProteinSequenceCreator then do not use this constructor because we need details about local file offsets for quick reads. InputStreams does not give you the name of the stream to access quickly via file seek. A seek in an inputstream is forced to read all the data so you don't gain anything.
        Parameters:
        is - inputStream
        headerParser -
        sequenceCreator -
    • Method Detail

      • process

        public LinkedHashMap<String,​Sprocess()
                                              throws IOException
        The parsing is done in this method.
        This method tries to process all the available fasta records in the File or InputStream, closes the underlying resource, and return the results in LinkedHashMap.
        You don't need to call close() after calling this method.
        Returns:
        HashMap containing all the parsed fasta records present, starting current fileIndex onwards.
        Throws:
        IOException - if an error occurs reading the input file
        See Also:
        process(int)
      • process

        public LinkedHashMap<String,​Sprocess​(int max)
                                              throws IOException
        This method tries to parse maximum max records from the open File or InputStream, and leaves the underlying resource open.
        Subsequent calls to the same method continue parsing the rest of the file.
        This is particularly useful when dealing with very big data files, (e.g. NCBI nr database), which can't fit into memory and will take long time before the first result is available.
        N.B.
        • This method can't be called after calling its NO-ARGUMENT twin.
        • remember to close the underlying resource when you are done.
        Parameters:
        max - maximum number of records to return, -1 for infinity.
        Returns:
        HashMap containing maximum max parsed fasta records present, starting current fileIndex onwards.
        Throws:
        IOException - if an error occurs reading the input file
        Since:
        3.0.6
        See Also:
        process()
      • main

        public static void main​(String[] args)