Package org.apache.sysds.runtime.io.cog

Class COGHeader

java.lang.Object
org.apache.sysds.runtime.io.cog.COGHeader
public class COGHeader extends Object
Represents a header for a COG file. This includes IFDs, endianess etc.

  • Constructor Details

    • COGHeader

      public COGHeader(boolean isLittleEndian)

  • Method Details

    • setIFD

      public void setIFD(IFDTag[] IFD)

    • getIFD

      public IFDTag[] getIFD()

    • addAdditionalIFD

      public void addAdditionalIFD(IFDTag[] IFD)

    • getAdditionalIFDs

      public ArrayList<IFDTag[]> getAdditionalIFDs()

    • getSingleAdditionalIFD

      public IFDTag[] getSingleAdditionalIFD(int index)

    • setSingleAdditionalIFD

      public void setSingleAdditionalIFD(int index, IFDTag[] IFD)

    • removeSingleAdditionalIFD

      public void removeSingleAdditionalIFD(int index)

    • setLittleEndian

      public void setLittleEndian(boolean isLittleEndian)

    • isLittleEndian

      public boolean isLittleEndian()

    • setGDALMetadata

      public void setGDALMetadata(String GDALMetadata)

    • getGDALMetadata

      public String getGDALMetadata()

    • setBigTIFF

      public void setBigTIFF(boolean isBigTIFF)

    • isBigTIFF

      public boolean isBigTIFF()

    • parseByteArray

      public Number parseByteArray(byte[] bytes, int length, int offset, boolean isDecimal, boolean isSigned, boolean isRational)
      Parses a byte array into a generic number. Can be byte, short, int, float or double depending on the options given. E.g.: Use .doubleValue() on the result to get a double value easily Supported lengths: isDecimal: - 4 bytes: float - 8 bytes: double otherwise: - 1 byte: byte - 2 bytes: short - 4 bytes: int Anything else will throw an exception
      Parameters:
      bytes - ???
      length - number of bytes that should be read
      offset - from the start of the byte array
      isDecimal - Whether we are dealing with a floating point number
      isSigned - Whether the number is signed
      isRational - Whether the number is a rational number as specified in the TIFF standard (first 32 bit integer numerator of a fraction, second 32 bit integer denominator)
      Returns:
      ???

    • readCOGHeader

      public static COGHeader readCOGHeader(COGByteReader byteReader)
      Reads the COG header from the BufferedInputStream. Handles little endian setting, checking magic number. After this you manually have to check the compatibility though if you desire to do so.
      Parameters:
      byteReader - ???
      Returns:
      filled COGHeader object

    • isCompatible

      public static String isCompatible(IFDTag[] IFD)
      Checks a given header for compatibility with the reader
      Parameters:
      IFD - ???
      Returns:
      empty string if compatible, error message otherwise