com.adobe.agl.impl

Class CharTrie

java.lang.Object

com.adobe.agl.impl.Trie

com.adobe.agl.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:

Trie

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	CharTrie.FriendAgent Java friend implementation

Nested classes/interfaces inherited from class com.adobe.agl.impl.Trie

Trie.DataManipulate

Constructor Summary

Constructors

Constructor and Description
CharTrie(InputStream inputStream, Trie.DataManipulate dataManipulate) Creates a new Trie with the settings for the trie data.
CharTrie(int initialValue, int leadUnitValue, Trie.DataManipulate dataManipulate) Make a dummy CharTrie.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Checks if the argument Trie has the same data as this Trie
char	getBMPValue(char ch) Get the value associated with the BMP code point.
char	getCodePointValue(int ch) Gets the value associated with the codepoint.
char	getLatin1LinearValue(char ch) Gets the latin 1 fast path value.
char	getLeadValue(char ch) Gets the value to the data which this lead surrogate character 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.
void	putIndexData(UCharacterProperty friend) Java friend implementation To store the index and data array into the argument.

Methods inherited from class com.adobe.agl.impl.Trie

getSerializedDataSize, isLatin1Linear

Methods inherited from class java.lang.Object

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

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 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

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)

Checks if the argument Trie has the same data as this Trie

Overrides:

equals in class Trie

Parameters:

other - Trie to check

Returns:

true if the argument Trie has the same data as this Trie, false otherwise