| java.lang.Object
 com.ibm.icu.impl.TrieBuilder
com.ibm.icu.impl.IntTrieBuilder
| IntTrieBuilder | | public class IntTrieBuilder extends TrieBuilder (Code) | | Builder class to manipulate and generate a trie.
This is useful for ICU data in primitive types.
Provides a compact way to store information that is indexed by Unicode
values, such as character properties, types, keyboard values, etc. This is
very useful when you have a block of Unicode data that contains significant
values while the rest of the Unicode data is unused in the application or
when you have a lot of redundance, such as where all 21,000 Han ideographs
have the same value. However, lookup is much faster than a hash table.
A trie of any primitive data type serves two purposes:
- Fast access of the indexed values.
- Smaller memory footprint.
This is a direct port from the ICU4C version
author:
Syn Wee Quek |
| Method Summary | |
| public int | getValue(int ch)
| | public int | getValue(int ch, boolean[] inBlockZero)
Get a 32 bit data from the table data
Parameters:
ch - code point for which data is to be retrieved.
Parameters:
inBlockZero - Output parameter, inBlockZero[0] returns true if thechar maps into block zero, otherwise false. | | public IntTrie | serialize(TrieBuilder.DataManipulate datamanipulate, Trie.DataManipulate triedatamanipulate)
| | public int | serialize(OutputStream os, boolean reduceTo16Bits, TrieBuilder.DataManipulate datamanipulate)
Serializes the build table to an output stream.
Compacts the build-time trie after all values are set, and then
writes the serialized form onto an output stream.
After this, this build-time Trie can only be serialized again and/or closed;
no further values can be added.
This function is the rough equivalent of utrie_seriaize() in ICU4C.
Parameters:
os - the output stream to which the seriaized trie will be written.If nul, the function still returns the size of the serialized Trie.
Parameters:
reduceTo16Bits - If true, reduce the data size to 16 bits. | | public boolean | setRange(int start, int limit, int value, boolean overwrite)
Set a value in a range of code points [start..limit]. | | public boolean | setValue(int ch, int value)
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| m_data_ | | protected int m_data_(Code) | | |
| m_initialValue_ | | protected int m_initialValue_(Code) | | |
| IntTrieBuilder | | public IntTrieBuilder(int aliasdata, int maxdatalength, int initialvalue, int leadunitvalue, boolean latin1linear)(Code) | | Constructs a build table
Parameters:
aliasdata - data to be filled into table
Parameters:
maxdatalength - maximum data length allowed in table
Parameters:
initialvalue - inital data value
Parameters:
latin1linear - is latin 1 to be linear |
| getValue | | public int getValue(int ch)(Code) | | Gets a 32 bit data from the table data
Parameters:
ch - codepoint which data is to be retrieved the 32 bit data |
| getValue | | public int getValue(int ch, boolean[] inBlockZero)(Code) | | Get a 32 bit data from the table data
Parameters:
ch - code point for which data is to be retrieved.
Parameters:
inBlockZero - Output parameter, inBlockZero[0] returns true if thechar maps into block zero, otherwise false. the 32 bit data value. |
| serialize | | public IntTrie serialize(TrieBuilder.DataManipulate datamanipulate, Trie.DataManipulate triedatamanipulate)(Code) | | Serializes the build table with 32 bit data
Parameters:
datamanipulate - builder raw fold method implementation
Parameters:
triedatamanipulate - result trie fold method a new trie |
| serialize | | public int serialize(OutputStream os, boolean reduceTo16Bits, TrieBuilder.DataManipulate datamanipulate) throws IOException(Code) | | Serializes the build table to an output stream.
Compacts the build-time trie after all values are set, and then
writes the serialized form onto an output stream.
After this, this build-time Trie can only be serialized again and/or closed;
no further values can be added.
This function is the rough equivalent of utrie_seriaize() in ICU4C.
Parameters:
os - the output stream to which the seriaized trie will be written.If nul, the function still returns the size of the serialized Trie.
Parameters:
reduceTo16Bits - If true, reduce the data size to 16 bits. The resultingserialized form can then be used to create a CharTrie.
Parameters:
datamanipulate - builder raw fold method implementation the number of bytes written to the output stream. |
| setRange | | public boolean setRange(int start, int limit, int value, boolean overwrite)(Code) | | Set a value in a range of code points [start..limit].
All code points c with start <= c < limit will get the value if
overwrite is true or if the old value is 0.
Parameters:
start - the first code point to get the value
Parameters:
limit - one past the last code point to get the value
Parameters:
value - the value
Parameters:
overwrite - flag for whether old non-initial values are to be overwritten false if a failure occurred (illegal argument or data array overrun) |
| setValue | | public boolean setValue(int ch, int value)(Code) | | Sets a 32 bit data in the table data
Parameters:
ch - codepoint which data is to be set
Parameters:
value - to set true if the set is successful, otherwise if the table has been compacted return false |
| Methods inherited from com.ibm.icu.impl.TrieBuilder | final protected static boolean equal_int(int[] array, int start1, int start2, int length)(Code)(Java Doc)
final protected static int findSameIndexBlock(int index, int indexLength, int otherBlock)(Code)(Java Doc)
protected void findUnusedBlocks()(Code)(Java Doc)
public boolean isInZeroBlock(int ch)(Code)(Java Doc)
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