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java.lang.Objectorg.apache.xerces.util.SymbolTable
org.apache.xerces.util.SoftReferenceSymbolTable
public class SoftReferenceSymbolTable
This symbol table uses SoftReferences to its String entries, which means that table entries that have no references to them can be garbage collected when memory is needed. Thus, in documents with very very large numbers of unique strings, using this SymbolTable will prevent an out of memory error from occuring.
SymbolTable| Nested Class Summary | |
|---|---|
protected static class |
SoftReferenceSymbolTable.SREntry
This class is a symbol table entry. |
protected static class |
SoftReferenceSymbolTable.SREntryData
|
| Nested classes/interfaces inherited from class org.apache.xerces.util.SymbolTable |
|---|
SymbolTable.Entry |
| Field Summary | |
|---|---|
protected SoftReferenceSymbolTable.SREntry[] |
fBuckets
|
| Fields inherited from class org.apache.xerces.util.SymbolTable |
|---|
fCount, fLoadFactor, fTableSize, fThreshold, TABLE_SIZE |
| Constructor Summary | |
|---|---|
SoftReferenceSymbolTable()
Constructs a new, empty SymbolTable with a default initial capacity (101) and load factor, which is 0.75. |
|
SoftReferenceSymbolTable(int initialCapacity)
Constructs a new, empty SymbolTable with the specified initial capacity and default load factor, which is 0.75. |
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SoftReferenceSymbolTable(int initialCapacity,
float loadFactor)
Constructs a new, empty SymbolTable with the specified initial capacity and the specified load factor. |
|
| Method Summary | |
|---|---|
java.lang.String |
addSymbol(char[] buffer,
int offset,
int length)
Adds the specified symbol to the symbol table and returns a reference to the unique symbol. |
java.lang.String |
addSymbol(java.lang.String symbol)
Adds the specified symbol to the symbol table and returns a reference to the unique symbol. |
boolean |
containsSymbol(char[] buffer,
int offset,
int length)
Returns true if the symbol table already contains the specified symbol. |
boolean |
containsSymbol(java.lang.String symbol)
Returns true if the symbol table already contains the specified symbol. |
protected void |
rehash()
Increases the capacity of and internally reorganizes this SymbolTable, in order to accommodate and access its entries more efficiently. |
| Methods inherited from class org.apache.xerces.util.SymbolTable |
|---|
hash, hash |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected SoftReferenceSymbolTable.SREntry[] fBuckets
| Constructor Detail |
|---|
public SoftReferenceSymbolTable(int initialCapacity,
float loadFactor)
initialCapacity - the initial capacity of the SymbolTable.loadFactor - the load factor of the SymbolTable.
java.lang.IllegalArgumentException - if the initial capacity is less
than zero, or if the load factor is nonpositive.public SoftReferenceSymbolTable(int initialCapacity)
initialCapacity - the initial capacity of the hashtable.
java.lang.IllegalArgumentException - if the initial capacity is less
than zero.public SoftReferenceSymbolTable()
| Method Detail |
|---|
public java.lang.String addSymbol(java.lang.String symbol)
addSymbol in class SymbolTablesymbol - The new symbol.
public java.lang.String addSymbol(char[] buffer,
int offset,
int length)
addSymbol in class SymbolTablebuffer - The buffer containing the new symbol.offset - The offset into the buffer of the new symbol.length - The length of the new symbol in the buffer.protected void rehash()
rehash in class SymbolTablepublic boolean containsSymbol(java.lang.String symbol)
containsSymbol in class SymbolTablesymbol - The symbol to look for.
public boolean containsSymbol(char[] buffer,
int offset,
int length)
containsSymbol in class SymbolTablebuffer - The buffer containing the symbol to look for.offset - The offset into the buffer.length - The length of the symbol in the buffer.
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