org.datanucleus.query.compiler

Class SymbolTable

java.lang.Object

org.datanucleus.query.compiler.SymbolTable

All Implemented Interfaces:

Serializable

public class SymbolTable
extends Object
implements Serializable

Table of symbols in a query.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SymbolTable()

Method Summary

Modifier and Type	Method and Description
int	addSymbol(Symbol symbol)
SymbolTable	getParentSymbolTable() Accessor for the parent symbol table (if any).
Symbol	getSymbol(String name) Return the Symbol for the specified name if known.
Symbol	getSymbolIgnoreCase(String name) Return the Symbol for the specified name if known, treating the name as case-insensitive.
Collection<String>	getSymbolNames() Accessor for the names of the symbols in this table.
SymbolResolver	getSymbolResolver()
boolean	hasSymbol(String name) Accessor for whether this symbol table has a particular symbol name.
void	removeSymbol(Symbol symbol)
void	setParentSymbolTable(SymbolTable tbl) Set the symbol table for any parent query, so that if this query refers to an expression from the parent query then it is resolvable.
void	setSymbolResolver(SymbolResolver resolver)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SymbolTable

public SymbolTable()

Method Detail

setSymbolResolver

public void setSymbolResolver(SymbolResolver resolver)

getSymbolResolver

public SymbolResolver getSymbolResolver()

setParentSymbolTable

public void setParentSymbolTable(SymbolTable tbl)

Set the symbol table for any parent query, so that if this query refers to an expression from the parent query then it is resolvable.

Parameters:

tbl - The parent symbol table

getParentSymbolTable

public SymbolTable getParentSymbolTable()

Accessor for the parent symbol table (if any).

Returns:

The parent symbol table

getSymbolNames

public Collection<String> getSymbolNames()

Accessor for the names of the symbols in this table.

Returns:

Names of the symbols

getSymbol

public Symbol getSymbol(String name)

Return the Symbol for the specified name if known. If there is a parent symbol table then looks up in that after if not found here (unless the name is "this").

Parameters:

name - The name to look up

Returns:

The symbol for this name

getSymbolIgnoreCase

public Symbol getSymbolIgnoreCase(String name)

Return the Symbol for the specified name if known, treating the name as case-insensitive. If there is a parent symbol table then looks up in that after if not found here (unless the name is "this").

Parameters:

name - The name to look up

Returns:

The symbol for this name

hasSymbol

public boolean hasSymbol(String name)

Accessor for whether this symbol table has a particular symbol name. Does not make any use of parent symbol table(s).

Parameters:

name - The name of the symbol we require

Returns:

Whether it is present here

addSymbol

public int addSymbol(Symbol symbol)

removeSymbol

public void removeSymbol(Symbol symbol)

toString

public String toString()

Overrides:

toString in class Object