com.alibaba.druid.sql.parser

类 SymbolTable

java.lang.Object

com.alibaba.druid.sql.parser.SymbolTable

public class SymbolTable
extends Object

作者:

wenshao

字段概要

字段

限定符和类型	字段和说明
static int	DEFAULT_TABLE_SIZE Default table size.

构造器概要

构造器

构造器和说明
SymbolTable() Constructs a symbol table with a default number of buckets.
SymbolTable(int tableSize) Constructs a symbol table with a specified number of buckets.

方法概要

方法

限定符和类型	方法和说明
String	addSymbol(char[] buffer, int offset, int len)
String	addSymbol(char[] buffer, int offset, int len, int hash) Adds the specified symbol to the symbol table and returns a reference to the unique symbol.
String	addSymbol(String symbol) Adds the specified symbol to the symbol table and returns a reference to the unique symbol.
int	getIndexMask()
static int	hash(char[] buffer, int offset, int len)
static int	hash(String symbol)

从类继承的方法 java.lang.Object

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

字段详细资料

DEFAULT_TABLE_SIZE

public static final int DEFAULT_TABLE_SIZE

Default table size.

另请参阅:

常量字段值

构造器详细资料

SymbolTable

public SymbolTable()

Constructs a symbol table with a default number of buckets.

SymbolTable

public SymbolTable(int tableSize)

Constructs a symbol table with a specified number of buckets.

方法详细资料

addSymbol

public String addSymbol(String symbol)

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.

参数:

symbol - The new symbol.

getIndexMask

public int getIndexMask()

addSymbol

public String addSymbol(char[] buffer,
               int offset,
               int len)

addSymbol

public String addSymbol(char[] buffer,
               int offset,
               int len,
               int hash)

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.

参数:

buffer - The buffer containing the new symbol.

offset - The offset into the buffer of the new symbol.

len - The length of the new symbol in the buffer.

hash

public static final int hash(String symbol)

hash

public static final int hash(char[] buffer,
       int offset,
       int len)