Class IntTrie

java.lang.Object
org.graalvm.shadowed.com.ibm.icu.impl.Trie
org.graalvm.shadowed.com.ibm.icu.impl.IntTrie
public class IntTrie extends Trie
Trie implementation which stores data in int, 32 bits. 2015-sep-03: Used only in CharsetSelector which could be switched to Trie2_32 as long as that does not load ICU4C selector data.
Since:
release 2.1, Jan 01 2002
See Also:

  • Constructor Details

    • IntTrie

      public IntTrie(ByteBuffer bytes, Trie.DataManipulate dataManipulate) throws IOException

      Creates a new Trie with the settings for the trie data.

      Unserialize the 32-bit-aligned input stream and use the data for the trie.

      Parameters:
      bytes - file buffer to a ICU data file, containing the trie
      dataManipulate - object which provides methods to parse the char data
      Throws:
      IOException - thrown when data reading fails

    • IntTrie

      public IntTrie(int initialValue, int leadUnitValue, Trie.DataManipulate dataManipulate)
      Make a dummy IntTrie. A dummy trie is an empty runtime trie, used when a real data trie cannot be loaded. The trie always returns the initialValue, or the leadUnitValue for lead surrogate code points. The Latin-1 part is always set up to be linear.
      Parameters:
      initialValue - the initial value that is set for all code points
      leadUnitValue - the value for lead surrogate code _units_ that do not have associated supplementary data
      dataManipulate - object which provides methods to parse the char data

  • Method Details

    • getCodePointValue

      public final int getCodePointValue(int ch)
      Gets the value associated with the codepoint. If no value is associated with the codepoint, a default value will be returned.
      Parameters:
      ch - codepoint
      Returns:
      offset to data

    • getLeadValue

      public final int getLeadValue(char ch)
      Gets the value to the data which this lead surrogate character points to. Returned data may contain folding offset information for the next trailing surrogate character. This method does not guarantee correct results for trail surrogates.
      Parameters:
      ch - lead surrogate character
      Returns:
      data value

    • getBMPValue

      public final int getBMPValue(char ch)
      Get the value associated with the BMP code point. Lead surrogate code points are treated as normal code points, with unfolded values that may differ from getLeadValue() results.
      Parameters:
      ch - the input BMP code point
      Returns:
      trie data value associated with the BMP codepoint

    • getSurrogateValue

      public final int getSurrogateValue(char lead, char trail)
      Get the value associated with a pair of surrogates.
      Parameters:
      lead - a lead surrogate
      trail - a trail surrogate

    • getTrailValue

      public final int getTrailValue(int leadvalue, char trail)
      Get a value from a folding offset (from the value of a lead surrogate) and a trail surrogate.
      Parameters:
      leadvalue - the value of a lead surrogate that contains the folding offset
      trail - surrogate
      Returns:
      trie data value associated with the trail character

    • getLatin1LinearValue

      public final int getLatin1LinearValue(char ch)

      Gets the latin 1 fast path value.

      Note this only works if latin 1 characters have their own linear array.

      Parameters:
      ch - latin 1 characters
      Returns:
      value associated with latin character

    • equals

      public boolean equals(Object other)
      CLOVER:OFF
      Overrides:
      equals in class Trie

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Trie

    • unserialize

      protected final void unserialize(ByteBuffer bytes)

      Parses the input stream and stores its trie content into a index and data array

      Overrides:
      unserialize in class Trie
      Parameters:
      bytes - data buffer containing trie data

    • getSurrogateOffset

      protected final int getSurrogateOffset(char lead, char trail)
      Gets the offset to the data which the surrogate pair points to.
      Specified by:
      getSurrogateOffset in class Trie
      Parameters:
      lead - lead surrogate
      trail - trailing surrogate
      Returns:
      offset to data

    • getValue

      protected final int getValue(int index)
      Gets the value at the argument index. For use internally in TrieIterator
      Specified by:
      getValue in class Trie
      Parameters:
      index - value at index will be retrieved
      Returns:
      32 bit value
      See Also:

    • getInitialValue

      protected final int getInitialValue()
      Gets the default initial value
      Specified by:
      getInitialValue in class Trie
      Returns:
      32 bit value