Package com.ibm.icu.impl

Class ICUBinary

java.lang.Object
com.ibm.icu.impl.ICUBinary
public final class ICUBinary extends Object

  • Field Details

  • Constructor Details

    • ICUBinary

      public ICUBinary()

  • Method Details

    • addDataFilesFromPath

      private static void addDataFilesFromPath(String dataPath, List<ICUBinary.DataFile> files)

    • addDataFilesFromFolder

      private static void addDataFilesFromFolder(File folder, StringBuilder itemPath, List<ICUBinary.DataFile> dataFiles)

    • compareKeys

      static int compareKeys(CharSequence key, ByteBuffer bytes, int offset)
      Compares the length-specified input key with the NUL-terminated table key. (ASCII)

    • compareKeys

      static int compareKeys(CharSequence key, byte[] bytes, int offset)

    • getData

      public static ByteBuffer getData(String itemPath)
      Loads an ICU binary data file and returns it as a ByteBuffer. The buffer contents is normally read-only, but its position etc. can be modified.
      Parameters:
      itemPath - Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
      Returns:
      The data as a read-only ByteBuffer, or null if the resource could not be found.

    • getData

      public static ByteBuffer getData(ClassLoader loader, String resourceName, String itemPath)
      Loads an ICU binary data file and returns it as a ByteBuffer. The buffer contents is normally read-only, but its position etc. can be modified.
      Parameters:
      loader - Used for loader.getResourceAsStream() unless the data is found elsewhere.
      resourceName - Resource name for use with the loader.
      itemPath - Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
      Returns:
      The data as a read-only ByteBuffer, or null if the resource could not be found.

    • getRequiredData

      public static ByteBuffer getRequiredData(String itemPath)
      Loads an ICU binary data file and returns it as a ByteBuffer. The buffer contents is normally read-only, but its position etc. can be modified.
      Parameters:
      itemPath - Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
      Returns:
      The data as a read-only ByteBuffer.
      Throws:
      MissingResourceException - if required==true and the resource could not be found

    • getData

      private static ByteBuffer getData(ClassLoader loader, String resourceName, String itemPath, boolean required)
      Loads an ICU binary data file and returns it as a ByteBuffer. The buffer contents is normally read-only, but its position etc. can be modified.
      Parameters:
      loader - Used for loader.getResourceAsStream() unless the data is found elsewhere.
      resourceName - Resource name for use with the loader.
      itemPath - Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
      required - If the resource cannot be found, this method returns null (!required) or throws an exception (required).
      Returns:
      The data as a read-only ByteBuffer, or null if required==false and the resource could not be found.
      Throws:
      MissingResourceException - if required==true and the resource could not be found

    • getDataFromFile

      private static ByteBuffer getDataFromFile(String itemPath)

    • mapFile

      private static ByteBuffer mapFile(File path)

    • addBaseNamesInFileFolder

      public static void addBaseNamesInFileFolder(String folder, String suffix, Set<String> names)
      Parameters:
      folder - The relative ICU data folder, like "" or "coll".
      suffix - Usually ".res".
      names - File base names relative to the folder are added without the suffix, for example "de_CH".

    • readHeaderAndDataVersion

      public static VersionInfo readHeaderAndDataVersion(ByteBuffer bytes, int dataFormat, ICUBinary.Authenticate authenticate) throws IOException
      Same as readHeader(), but returns a VersionInfo rather than a compact int.
      Throws:
      IOException

    • readHeader

      public static int readHeader(ByteBuffer bytes, int dataFormat, ICUBinary.Authenticate authenticate) throws IOException
      Reads an ICU data header, checks the data format, and returns the data version.

      Assumes that the ByteBuffer position is 0 on input. The buffer byte order is set according to the data. The buffer position is advanced past the header (including UDataInfo and comment).

      See C++ ucmndata.h and unicode/udata.h.

      Returns:
      dataVersion
      Throws:
      IOException - if this is not a valid ICU data item of the expected dataFormat

    • writeHeader

      public static int writeHeader(int dataFormat, int formatVersion, int dataVersion, DataOutputStream dos) throws IOException
      Writes an ICU data header. Does not write a copyright string.
      Returns:
      The length of the header (number of bytes written).
      Throws:
      IOException - from the DataOutputStream

    • skipBytes

      public static void skipBytes(ByteBuffer bytes, int skipLength)

    • getBytes

      public static byte[] getBytes(ByteBuffer bytes, int length, int additionalSkipLength)

    • getString

      public static String getString(ByteBuffer bytes, int length, int additionalSkipLength)

    • getChars

      public static char[] getChars(ByteBuffer bytes, int length, int additionalSkipLength)

    • getShorts

      public static short[] getShorts(ByteBuffer bytes, int length, int additionalSkipLength)

    • getInts

      public static int[] getInts(ByteBuffer bytes, int length, int additionalSkipLength)

    • getLongs

      public static long[] getLongs(ByteBuffer bytes, int length, int additionalSkipLength)

    • sliceWithOrder

      public static ByteBuffer sliceWithOrder(ByteBuffer bytes)
      Same as ByteBuffer.slice() plus preserving the byte order.

    • getByteBufferFromInputStreamAndCloseStream

      public static ByteBuffer getByteBufferFromInputStreamAndCloseStream(InputStream is) throws IOException
      Reads the entire contents from the stream into a byte array and wraps it into a ByteBuffer. Closes the InputStream at the end.
      Throws:
      IOException

    • getVersionInfoFromCompactInt

      public static VersionInfo getVersionInfoFromCompactInt(int version)
      Returns a VersionInfo for the bytes in the compact version integer.

    • getVersionByteArrayFromCompactInt

      public static byte[] getVersionByteArrayFromCompactInt(int version)
      Returns an array of the bytes in the compact version integer.