org.hotwheel.json.impl.jackson

类 BytesToNameCanonicalizer

java.lang.Object

org.hotwheel.json.impl.jackson.BytesToNameCanonicalizer

public final class BytesToNameCanonicalizer
extends Object

This class is basically a caching symbol table implementation used for canonicalizing Names, constructed directly from a byte-based input source.

作者:

Tatu Saloranta

方法概要

限定符和类型	方法和说明
Name	addName(String symbolStr, int[] quads, int qlen)
Name	addName(String symbolStr, int q1, int q2)
static int	calcHash(int firstQuad)
static int	calcHash(int[] quads, int qlen)
static int	calcHash(int firstQuad, int secondQuad)
static BytesToNameCanonicalizer	createRoot()
Name	findName(int firstQuad) Finds and returns name matching the specified symbol, if such name already exists in the table.
Name	findName(int[] quads, int qlen) Finds and returns name matching the specified symbol, if such name already exists in the table; or if not, creates name object, adds to the table, and returns it.
Name	findName(int firstQuad, int secondQuad) Finds and returns name matching the specified symbol, if such name already exists in the table.
static Name	getEmptyName()
BytesToNameCanonicalizer	makeChild(boolean canonicalize, boolean intern)
boolean	maybeDirty() Method called to check to quickly see if a child symbol table may have gotten additional entries.
void	release() Method called by the using code to indicate it is done with this instance.
int	size()

从类继承的方法 java.lang.Object

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

方法详细资料

createRoot

public static BytesToNameCanonicalizer createRoot()

getEmptyName

public static Name getEmptyName()

calcHash

public static final int calcHash(int firstQuad)

calcHash

public static final int calcHash(int firstQuad,
                                 int secondQuad)

calcHash

public static final int calcHash(int[] quads,
                                 int qlen)

makeChild

public BytesToNameCanonicalizer makeChild(boolean canonicalize,
                                          boolean intern)

参数:

intern - Whether canonical symbol Strings should be interned or not

release

public void release()

Method called by the using code to indicate it is done with this instance. This lets instance merge accumulated changes into parent (if need be), safely and efficiently, and without calling code having to know about parent information

size

public int size()

maybeDirty

public boolean maybeDirty()

Method called to check to quickly see if a child symbol table may have gotten additional entries. Used for checking to see if a child table should be merged into shared table.

findName

public Name findName(int firstQuad)

Finds and returns name matching the specified symbol, if such name already exists in the table. If not, will return null.

Note: separate methods to optimize common case of short element/attribute names (4 or less ascii characters)

参数:

firstQuad - int32 containing first 4 bytes of the name; if the whole name less than 4 bytes, padded with zero bytes in front (zero MSBs, ie. right aligned)

返回:

Name matching the symbol passed (or constructed for it)

findName

public Name findName(int firstQuad,
                     int secondQuad)

Finds and returns name matching the specified symbol, if such name already exists in the table. If not, will return null.

Note: separate methods to optimize common case of relatively short element/attribute names (8 or less ascii characters)

参数:

firstQuad - int32 containing first 4 bytes of the name.

secondQuad - int32 containing bytes 5 through 8 of the name; if less than 8 bytes, padded with up to 3 zero bytes in front (zero MSBs, ie. right aligned)

返回:

Name matching the symbol passed (or constructed for it)

findName

public Name findName(int[] quads,
                     int qlen)

Finds and returns name matching the specified symbol, if such name already exists in the table; or if not, creates name object, adds to the table, and returns it.

Note: this is the general purpose method that can be called for names of any length. However, if name is less than 9 bytes long, it is preferable to call the version optimized for short names.

参数:

quads - Array of int32s, each of which contain 4 bytes of encoded name

qlen - Number of int32s, starting from index 0, in quads parameter

返回:

Name matching the symbol passed (or constructed for it)

addName

public Name addName(String symbolStr,
                    int q1,
                    int q2)

addName

public Name addName(String symbolStr,
                    int[] quads,
                    int qlen)