com.sun.tools.javac.util
Class SharedNameTable

java.lang.Object
  com.sun.tools.javac.util.Name.Table
      com.sun.tools.javac.util.SharedNameTable

public class SharedNameTable
extends Name.Table

Implementation of Name.Table that stores all names in a single shared byte array, expanding it as needed. This avoids the overhead incurred by using an array of bytes for each name.

This is NOT part of any API supported by Sun Microsystems. If you write code that depends on this, you do so at your own risk. This code and its internal interfaces are subject to change or deletion without notice.

Nested Class Summary

(package private) static class

SharedNameTable.NameImpl

Field Summary

byte[]	bytes The shared byte array holding all encountered names.
private static List<java.lang.ref.SoftReference<SharedNameTable>>	freelist
private SharedNameTable.NameImpl[]	hashes The hash table for names.
private int	hashMask The mask to be used for hashing
private int	nc The number of filled bytes in `names'.

Fields inherited from class com.sun.tools.javac.util.Name.Table

names

Constructor Summary

SharedNameTable(Names names)

SharedNameTable(Names names, int hashSize, int nameSize)
Allocator

Method Summary

static SharedNameTable	create(Names names)
void	dispose() Release any resources used by this table.
private static void	dispose(SharedNameTable t)
Name	fromChars(char[] cs, int start, int len) Get the name from the characters in cs[start..start+len-1].
Name	fromUtf(byte[] cs, int start, int len) get the name for the bytes in cs[start..start+len-1].

Methods inherited from class com.sun.tools.javac.util.Name.Table

equals, fromString, fromUtf, hashValue

Methods inherited from class java.lang.Object

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

Field Detail

freelist

private static List<java.lang.ref.SoftReference<SharedNameTable>> freelist

hashes

private SharedNameTable.NameImpl[] hashes

The hash table for names.

bytes

public byte[] bytes

The shared byte array holding all encountered names.

hashMask

private int hashMask

The mask to be used for hashing

nc

private int nc

The number of filled bytes in `names'.

Constructor Detail

SharedNameTable

public SharedNameTable(Names names,
                       int hashSize,
                       int nameSize)

Allocator

Parameters:

names - The main name table

hashSize - the (constant) size to be used for the hash table needs to be a power of two.

nameSize - the initial size of the name table.

SharedNameTable

public SharedNameTable(Names names)

Method Detail

create

public static SharedNameTable create(Names names)

dispose

private static void dispose(SharedNameTable t)

fromChars

public Name fromChars(char[] cs,
                      int start,
                      int len)

Description copied from class: Name.Table

Get the name from the characters in cs[start..start+len-1].

Specified by:

fromChars in class Name.Table

fromUtf

public Name fromUtf(byte[] cs,
                    int start,
                    int len)

Description copied from class: Name.Table

get the name for the bytes in cs[start..start+len-1]. Assume that bytes are in utf8 format.

Specified by:

fromUtf in class Name.Table

dispose

public void dispose()

Description copied from class: Name.Table

Release any resources used by this table.

Specified by:

dispose in class Name.Table