| java.lang.Object
 org.apache.xerces.util.SymbolTable
org.apache.xerces.util.SoftReferenceSymbolTable
| SoftReferenceSymbolTable | | public class SoftReferenceSymbolTable extends SymbolTable (Code) | | 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.
See Also: SymbolTable
author:
Peter McCracken, IBM
version:
$Id: SoftReferenceSymbolTable.java 496158 2007-01-14 21:27:15Z mrglavas $ |
| Inner Class :final protected static class SREntry extends SoftReference | |
| Inner Class :final protected static class SREntryData | |
| Field Summary | |
| protected SREntry[] | fBuckets
|
| Constructor Summary | |
| public | SoftReferenceSymbolTable(int initialCapacity, float loadFactor)
Constructs a new, empty SymbolTable with the specified initial
capacity and the specified load factor. | | public | SoftReferenceSymbolTable(int initialCapacity)
Constructs a new, empty SymbolTable with the specified initial capacity
and default load factor, which is 0.75. | | public | SoftReferenceSymbolTable()
Constructs a new, empty SymbolTable with a default initial capacity (101)
and load factor, which is 0.75. |
| Method Summary | |
| public String | addSymbol(String symbol)
Adds the specified symbol to the symbol table and returns a
reference to the unique symbol. | | public String | addSymbol(char[] buffer, int offset, int length)
Adds the specified symbol to the symbol table and returns a
reference to the unique symbol. | | public boolean | containsSymbol(String symbol)
Returns true if the symbol table already contains the specified
symbol. | | public boolean | containsSymbol(char[] buffer, int offset, int length)
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. |
| fBuckets | | protected SREntry[] fBuckets(Code) | | |
| SoftReferenceSymbolTable | | public SoftReferenceSymbolTable(int initialCapacity, float loadFactor)(Code) | | Constructs a new, empty SymbolTable with the specified initial
capacity and the specified load factor.
Parameters:
initialCapacity - the initial capacity of the SymbolTable.
Parameters:
loadFactor - the load factor of the SymbolTable.
throws:
IllegalArgumentException - if the initial capacity is lessthan zero, or if the load factor is nonpositive. |
| SoftReferenceSymbolTable | | public SoftReferenceSymbolTable(int initialCapacity)(Code) | | Constructs a new, empty SymbolTable with the specified initial capacity
and default load factor, which is 0.75.
Parameters:
initialCapacity - the initial capacity of the hashtable.
throws:
IllegalArgumentException - if the initial capacity is lessthan zero. |
| SoftReferenceSymbolTable | | public SoftReferenceSymbolTable()(Code) | | Constructs a new, empty SymbolTable with a default initial capacity (101)
and load factor, which is 0.75.
|
| addSymbol | | public String addSymbol(String symbol)(Code) | | Adds the specified symbol to the symbol table and returns a
reference to the unique symbol. If the symbol already exists,
the previous symbol reference is returned instead, in order
guarantee that symbol references remain unique.
Parameters:
symbol - The new symbol. |
| addSymbol | | public String addSymbol(char[] buffer, int offset, int length)(Code) | | Adds the specified symbol to the symbol table and returns a
reference to the unique symbol. If the symbol already exists,
the previous symbol reference is returned instead, in order
guarantee that symbol references remain unique.
Parameters:
buffer - The buffer containing the new symbol.
Parameters:
offset - The offset into the buffer of the new symbol.
Parameters:
length - The length of the new symbol in the buffer. |
| containsSymbol | | public boolean containsSymbol(String symbol)(Code) | | Returns true if the symbol table already contains the specified
symbol.
Parameters:
symbol - The symbol to look for. |
| containsSymbol | | public boolean containsSymbol(char[] buffer, int offset, int length)(Code) | | Returns true if the symbol table already contains the specified
symbol.
Parameters:
buffer - The buffer containing the symbol to look for.
Parameters:
offset - The offset into the buffer.
Parameters:
length - The length of the symbol in the buffer. |
| rehash | | protected void rehash()(Code) | | Increases the capacity of and internally reorganizes this
SymbolTable, in order to accommodate and access its entries more
efficiently. This method is called automatically when the
number of keys in the SymbolTable exceeds this hashtable's capacity
and load factor.
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