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java.lang.Object com.fasterxml.jackson.core.sym.BytesToNameCanonicalizer
public final class BytesToNameCanonicalizer
This class is basically a caching symbol table implementation used for
canonicalizing Name
s, constructed directly from a byte-based
input source.
Field Summary | |
---|---|
protected static int |
DEFAULT_TABLE_SIZE
|
protected static int |
MAX_TABLE_SIZE
Let's not expand symbol tables past some maximum size; this should protected against OOMEs caused by large documents with uniquer (~= random) names. |
Method Summary | |
---|---|
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()
|
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final int DEFAULT_TABLE_SIZE
protected static final int MAX_TABLE_SIZE
Method Detail |
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public static BytesToNameCanonicalizer createRoot()
public BytesToNameCanonicalizer makeChild(boolean canonicalize, boolean intern)
intern
- Whether canonical symbol Strings should be interned
or notpublic void release()
public int size()
public boolean maybeDirty()
public static Name getEmptyName()
public Name findName(int firstQuad)
Note: separate methods to optimize common case of short element/attribute names (4 or less ascii characters)
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)
public Name findName(int firstQuad, int secondQuad)
Note: separate methods to optimize common case of relatively short element/attribute names (8 or less ascii characters)
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)
public Name findName(int[] quads, int qlen)
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.
quads
- Array of int32s, each of which contain 4 bytes of
encoded nameqlen
- Number of int32s, starting from index 0, in quads
parameter
public Name addName(String symbolStr, int q1, int q2)
public Name addName(String symbolStr, int[] quads, int qlen)
public static final int calcHash(int firstQuad)
public static final int calcHash(int firstQuad, int secondQuad)
public static final int calcHash(int[] quads, int qlen)
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