Class CharTrie

java.lang.Object
org.graalvm.shadowed.com.ibm.icu.impl.Trie
org.graalvm.shadowed.com.ibm.icu.impl.CharTrie
public class CharTrie extends Trie
Trie implementation which stores data in char, 16 bits.
Since:
release 2.1, Jan 01 2002
See Also:

  • Constructor Details

    • CharTrie

      public CharTrie(ByteBuffer bytes, Trie.DataManipulate dataManipulate)

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

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

      Parameters:
      bytes - data of an ICU data file, containing the trie
      dataManipulate - object which provides methods to parse the char data

    • CharTrie

      public CharTrie(int initialValue, int leadUnitValue, Trie.DataManipulate dataManipulate)
      Make a dummy CharTrie. 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 char 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 char 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 char 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 char 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 char getTrailValue(int leadvalue, char trail)

      Get a value from a folding offset (from the value of a lead surrogate) and a trail surrogate.

      If the

      Parameters:
      leadvalue - value associated with the lead surrogate which contains the folding offset
      trail - surrogate
      Returns:
      trie data value associated with the trail character

    • getLatin1LinearValue

      public final char 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 byte buffer and stores its trie content into a index and data array

      Overrides:
      unserialize in class Trie
      Parameters:
      bytes - 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