sun.text.normalizer
Class CharTrie

java.lang.Object
  sun.text.normalizer.Trie
      sun.text.normalizer.CharTrie

public class CharTrie
extends Trie

Trie implementation which stores data in char, 16 bits.

Since:

release 2.1, Jan 01 2002

See Also:

com.ibm.icu.impl.Trie

Nested Class Summary

class

CharTrie.FriendAgent Java friend implementation

Nested classes/interfaces inherited from class sun.text.normalizer.Trie

Trie.DataManipulate

Field Summary

Fields inherited from class sun.text.normalizer.Trie

INDEX_STAGE_1_SHIFT_, INDEX_STAGE_2_SHIFT_, INDEX_STAGE_3_MASK_, LEAD_INDEX_OFFSET_, m_dataLength_, m_dataManipulate_, m_dataOffset_, m_index_, SURROGATE_MASK_

Constructor Summary

CharTrie(InputStream inputStream, Trie.DataManipulate dataManipulate)
Creates a new Trie with the settings for the trie data.

Method Summary

char	getCodePointValue(int ch) Gets the value associated with the codepoint.
protected int	getInitialValue() Gets the default initial value
char	getLeadValue(char ch) Gets the value to the data which this lead surrogate character points to.
protected int	getSurrogateOffset(char lead, char trail) Gets the offset to the data which the surrogate pair points to.
char	getSurrogateValue(char lead, char trail) Get the value associated with a pair of surrogates.
char	getTrailValue(int leadvalue, char trail) Get a value from a folding offset (from the value of a lead surrogate) and a trail surrogate.
protected int	getValue(int index) Gets the value at the argument index.
void	putIndexData(UCharacterProperty friend) Java friend implementation To store the index and data array into the argument.
protected void	unserialize(InputStream inputStream) Parses the input stream and stores its trie content into a index and data array

Methods inherited from class sun.text.normalizer.Trie

getBMPOffset, getCodePointOffset, getLeadOffset, getRawOffset, isCharTrie, isIntTrie

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CharTrie

public CharTrie(InputStream inputStream,
                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:

inputStream - file input stream 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

Method Detail

putIndexData

public void putIndexData(UCharacterProperty friend)

Java friend implementation To store the index and data array into the argument.

Parameters:

friend - java friend UCharacterProperty object to store the array

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

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

unserialize

protected final void unserialize(InputStream inputStream)
                          throws IOException

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

Overrides:

unserialize in class Trie

Parameters:

inputStream - data input stream containing trie data

Throws:

IOException - thrown when data reading fails

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:

com.ibm.icu.impl.TrieIterator

getInitialValue

protected final int getInitialValue()

Gets the default initial value

Specified by:

getInitialValue in class Trie

Returns:

32 bit value