Package com.ibm.icu.impl
Class IntTrie
- java.lang.Object
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- com.ibm.icu.impl.Trie
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- com.ibm.icu.impl.IntTrie
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Nested Class Summary
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Nested classes/interfaces inherited from class com.ibm.icu.impl.Trie
Trie.DataManipulate
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Field Summary
Fields Modifier and Type Field Description private int[]
m_data_
Array of char dataprivate int
m_initialValue_
Default value-
Fields inherited from class com.ibm.icu.impl.Trie
BMP_INDEX_LENGTH, DATA_BLOCK_LENGTH, HEADER_LENGTH_, HEADER_OPTIONS_DATA_IS_32_BIT_, HEADER_OPTIONS_INDEX_SHIFT_, HEADER_OPTIONS_LATIN1_IS_LINEAR_MASK_, HEADER_SIGNATURE_, INDEX_STAGE_1_SHIFT_, INDEX_STAGE_2_SHIFT_, INDEX_STAGE_3_MASK_, LEAD_INDEX_OFFSET_, m_dataLength_, m_dataManipulate_, m_dataOffset_, m_index_, SURROGATE_BLOCK_BITS, SURROGATE_BLOCK_COUNT, SURROGATE_MASK_
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Constructor Summary
Constructors Constructor Description IntTrie(char[] index, int[] data, int initialvalue, int options, Trie.DataManipulate datamanipulate)
Internal constructor for builder useIntTrie(int initialValue, int leadUnitValue, Trie.DataManipulate dataManipulate)
Make a dummy IntTrie.IntTrie(java.nio.ByteBuffer bytes, Trie.DataManipulate dataManipulate)
Creates a new Trie with the settings for the trie data.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object other)
Checks if the argument Trie has the same data as this Trieint
getBMPValue(char ch)
Get the value associated with the BMP code point.int
getCodePointValue(int ch)
Gets the value associated with the codepoint.protected int
getInitialValue()
Gets the default initial valueint
getLatin1LinearValue(char ch)
Gets the latin 1 fast path value.int
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.int
getSurrogateValue(char lead, char trail)
Get the value associated with a pair of surrogates.int
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.int
hashCode()
protected void
unserialize(java.nio.ByteBuffer bytes)
Parses the input stream and stores its trie content into a index and data array-
Methods inherited from class com.ibm.icu.impl.Trie
getBMPOffset, getCodePointOffset, getLeadOffset, getRawOffset, getSerializedDataSize, isCharTrie, isIntTrie, isLatin1Linear
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Constructor Detail
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IntTrie
public IntTrie(java.nio.ByteBuffer bytes, Trie.DataManipulate dataManipulate) throws java.io.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 triedataManipulate
- object which provides methods to parse the char data- Throws:
java.io.IOException
- thrown when data reading fails
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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 pointsleadUnitValue
- the value for lead surrogate code _units_ that do not have associated supplementary datadataManipulate
- object which provides methods to parse the char data
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IntTrie
IntTrie(char[] index, int[] data, int initialvalue, int options, Trie.DataManipulate datamanipulate)
Internal constructor for builder use- Parameters:
index
- the index array to be slotted into this triedata
- the data array to be slotted into this trieinitialvalue
- the initial value for this trieoptions
- trie options to usedatamanipulate
- folding implementation
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Method Detail
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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
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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
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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
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getSurrogateValue
public final int getSurrogateValue(char lead, char trail)
Get the value associated with a pair of surrogates.- Parameters:
lead
- a lead surrogatetrail
- a trail surrogate
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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 offsettrail
- surrogate- Returns:
- trie data value associated with the trail character
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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
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equals
public boolean equals(java.lang.Object other)
Checks if the argument Trie has the same data as this Trie
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unserialize
protected final void unserialize(java.nio.ByteBuffer bytes)
Parses the input stream and stores its trie content into a index and data array
- Overrides:
unserialize
in classTrie
- Parameters:
bytes
- data buffer containing trie data
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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 classTrie
- Parameters:
lead
- lead surrogatetrail
- trailing surrogate- Returns:
- offset to data
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getValue
protected final int getValue(int index)
Gets the value at the argument index. For use internally in TrieIterator- Specified by:
getValue
in classTrie
- Parameters:
index
- value at index will be retrieved- Returns:
- 32 bit value
- See Also:
TrieIterator
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getInitialValue
protected final int getInitialValue()
Gets the default initial value- Specified by:
getInitialValue
in classTrie
- Returns:
- 32 bit value
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