java.lang.Object
- gw.lang.parser.ThreadSafeSymbolTable

All Implemented Interfaces:: IStackProvider, ISymbolTable

public abstract class ThreadSafeSymbolTable
extends Object
implements ISymbolTable

Field Summary
- Fields inherited from interface gw.lang.parser.IStackProvider
  START_POS, SUPER_POS, THIS_POS

Constructor Summary

Constructors
Constructor Description

ThreadSafeSymbolTable(boolean bDefineCommonSymbols)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clearDefaultSymbolTable()`
`ISymbolTable`	`copy()`	Perform a semi-deep copy of this symbol table.
`void`	`defineCommonSymbols()`	Define symbols that are considered ubiquitous.
`protected ISymbolTable`	`getDefaultSymbolTable()`
`int`	`getNextStackIndex()`	For compile-time assignment of stack indexes.
`int`	`getNextStackIndexForScope(IScope scope)`	For compile-time assignment of stack indexes at a particular scope.
`int`	`getPrivateGlobalScopeCount()`
`int`	`getScopeCount()`
`ISymbol`	`getSymbol(CharSequence name)`
`Map`	`getSymbols()`
`Map`	`getSymbols(int iScopeOffset, int iPrivateGlobalIndex)`
`ISymbolTable`	`getTargetSymbolTable()`
`ISymbol`	`getThisSymbolFromStackOrMap()`	Get the 'this' symbol from either the stack or the table.
`protected abstract ISymbolTable`	`getThreadLocalSymbolTable()`	Get a thread-local symbol table.
`int`	`getTotalSymbolCount()`
`boolean`	`hasIsolatedScope()`	For compile-time use.
`boolean`	`isSymbolWithinScope(ISymbol sym, IScope scope)`
`IScope`	`peekIsolatedScope()`
`IScope`	`peekScope()`
`IScope`	`peekScope(int iPos)`
`void`	`popGlobalScope(IScope scope)`	Pops a global scope previously pushed via `pushGlobalScope( IScope )` or `pushPrivateGlobalScope( IScope )`.
`IScope`	`popScope()`	Pop a local scope context from the symbol table.
`IScope`	`popScope(IScope scope)`
`IScope`	`pushIsolatedScope(IActivationContext activationCtx)`	Push a scope that demarcates an activation record.
`void`	`pushPrivateGlobalScope(IScope scope)`	Push a global scope you specify onto the private global scope space.
`IScope`	`pushScope()`	Push a local scope context onto the symbol table.
`IScope`	`pushScope(IScope scope)`	Push a local scope context onto the symbol table.
`void`	`putSymbol(ISymbol symbol)`	Maps a name to a symbol in the table.
`ISymbol`	`removeSymbol(CharSequence name)`	Removes a previously mapped symbol.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ThreadSafeSymbolTable
```
public ThreadSafeSymbolTable(boolean bDefineCommonSymbols)
```
- Method Detail
  - copy
```
public ISymbolTable copy()
```
    Description copied from interface: ISymbolTable
    
    Perform a semi-deep copy of this symbol table. Symbols need not be cloned.
    
    Specified by:
    
    copy in interface ISymbolTable
    
    Returns:
    
    A semi-deep copy of this symbol table.
  - getSymbol
```
public ISymbol getSymbol(CharSequence name)
```
    Specified by:
    
    getSymbol in interface ISymbolTable
    
    Returns:
    
    The symbol mapped to the specified name.
  - putSymbol
```
public void putSymbol(ISymbol symbol)
```
    Description copied from interface: ISymbolTable
    
    Maps a name to a symbol in the table.
    
    Specified by:
    
    putSymbol in interface ISymbolTable
  - removeSymbol
```
public ISymbol removeSymbol(CharSequence name)
```
    Description copied from interface: ISymbolTable
    
    Removes a previously mapped symbol.
    
    Specified by:
    
    removeSymbol in interface ISymbolTable
    
    Parameters:
    
    name - The name mapped to the symbol to remove.
  - getSymbols
```
public Map getSymbols()
```
    Specified by:
    
    getSymbols in interface ISymbolTable
    
    Returns:
    
    A list of currently mapped ISymbols e.g., the values in a hash table based implementation.
  - getSymbols
```
public Map getSymbols(int iScopeOffset,
                      int iPrivateGlobalIndex)
```
    Specified by:
    
    getSymbols in interface ISymbolTable
    
    Parameters:
    
    iScopeOffset - Scopes positioned on the stack at an index greater than this number are not included. Very useful for examining a specific scope e.g., for a debugger. Note an index < 0 indicates that all scopes are included.
    
    Returns:
    
    A list of currently mapped ISymbols e.g., the values in a hash table based implementation.
  - getTotalSymbolCount
```
public int getTotalSymbolCount()
```
    Specified by:
    
    getTotalSymbolCount in interface ISymbolTable
    
    Returns:
    
    the number of symbols exist in this table.
  - getScopeCount
```
public int getScopeCount()
```
    Specified by:
    
    getScopeCount in interface ISymbolTable
    
    Returns:
    
    The number of scopes on the stack. These include all scopes: global, isolated, and local. Useful for recording a specific offset in the symbol table e.g., a debugger needs this to jump to a position in a call stack.
    
    See Also:
    
    ISymbolTable.getSymbols(int,int)
  - getPrivateGlobalScopeCount
```
public int getPrivateGlobalScopeCount()
```
    Specified by:
    
    getPrivateGlobalScopeCount in interface ISymbolTable
    
    Returns:
    
    The number of scopes on the private global stack. Useful for recording a specific offset in the symbol table e.g., a debugger needs this to jump to a position in a call stack.
    
    See Also:
    
    ISymbolTable.getSymbols(int,int)
  - pushScope
```
public IScope pushScope()
```
    Description copied from interface: ISymbolTable
    
    Push a local scope context onto the symbol table.
    
    Specified by:
    
    pushScope in interface ISymbolTable
    
    Returns:
    
    The pushed scope.
  - pushScope
```
public IScope pushScope(IScope scope)
```
    Description copied from interface: ISymbolTable
    
    Push a local scope context onto the symbol table.
    
    Specified by:
    
    pushScope in interface ISymbolTable
    
    Parameters:
    
    scope - the scope to push
    
    Returns:
    
    The pushed scope.
  - pushPrivateGlobalScope
```
public void pushPrivateGlobalScope(IScope scope)
```
    Description copied from interface: ISymbolTable
    
    Push a global scope you specify onto the private global scope space. Useful for handling private global scopes for libraries, namespaces, etc. As this functionality is primarily for Gosu runtime, you'll likely never need to call this.
    If you need to push a scope with restricted visibility, consider calling pushIsolatedScope() instead.
    
    Specified by:
    
    pushPrivateGlobalScope in interface ISymbolTable
    
    See Also:
    
    ISymbolTable.pushScope(), ISymbolTable.pushIsolatedScope(IActivationContext)
  - popGlobalScope
```
public void popGlobalScope(IScope scope)
```
    Description copied from interface: ISymbolTable
    
    Pops a global scope previously pushed via pushGlobalScope( IScope ) or pushPrivateGlobalScope( IScope ).
    You probably shouldn't call this method.
    
    Specified by:
    
    popGlobalScope in interface ISymbolTable
    
    See Also:
    
    ISymbolTable.pushPrivateGlobalScope(IScope), ISymbolTable.popScope()
  - popScope
```
public IScope popScope()
```
    Description copied from interface: ISymbolTable
    
    Pop a local scope context from the symbol table.
    See pushScope() for implementation suggestions.
    
    Specified by:
    
    popScope in interface ISymbolTable
    
    Returns:
    
    The popped scope.
  - peekScope
```
public IScope peekScope()
```
    Specified by:
    
    peekScope in interface ISymbolTable
    
    Returns:
    
    the currently active scope
  - peekScope
```
public IScope peekScope(int iPos)
```
    Specified by:
    
    peekScope in interface ISymbolTable
  - popScope
```
public IScope popScope(IScope scope)
```
    Specified by:
    
    popScope in interface ISymbolTable
  - pushIsolatedScope
```
public IScope pushIsolatedScope(IActivationContext activationCtx)
```
    Description copied from interface: ISymbolTable
    
    Push a scope that demarcates an activation record. The behavior is nearly identical to pushScope(), the [big] difference is that activation record scopes cannot access symbols from other activation record scopes.
    Use popScope() to pop a scope pushed via this method.
    
    Specified by:
    
    pushIsolatedScope in interface ISymbolTable
    
    Parameters:
    
    activationCtx - The context for the activation record.
    
    Returns:
    
    The isolated scope (aka the activation record).
  - defineCommonSymbols
```
public void defineCommonSymbols()
```
    Description copied from interface: ISymbolTable
    
    Define symbols that are considered ubiquitous. There may be none.
    
    Specified by:
    
    defineCommonSymbols in interface ISymbolTable
  - getNextStackIndex
```
public int getNextStackIndex()
```
    Description copied from interface: IStackProvider
    
    For compile-time assignment of stack indexes.
    
    Specified by:
    
    getNextStackIndex in interface IStackProvider
  - getNextStackIndexForScope
```
public int getNextStackIndexForScope(IScope scope)
```
    Description copied from interface: IStackProvider
    
    For compile-time assignment of stack indexes at a particular scope.
    
    Specified by:
    
    getNextStackIndexForScope in interface IStackProvider
  - hasIsolatedScope
```
public boolean hasIsolatedScope()
```
    Description copied from interface: IStackProvider
    
    For compile-time use. Returns true iff an isolated scope is visible.
    
    Specified by:
    
    hasIsolatedScope in interface IStackProvider
  - getThisSymbolFromStackOrMap
```
public ISymbol getThisSymbolFromStackOrMap()
```
    Description copied from interface: ISymbolTable
    
    Get the 'this' symbol from either the stack or the table.
    
    Specified by:
    
    getThisSymbolFromStackOrMap in interface ISymbolTable
  - getTargetSymbolTable
```
public ISymbolTable getTargetSymbolTable()
```
  - isSymbolWithinScope
```
public boolean isSymbolWithinScope(ISymbol sym,
                                   IScope scope)
```
    Specified by:
    
    isSymbolWithinScope in interface ISymbolTable
    
    Returns:
    
    true if the given symbol is within the given scope
  - peekIsolatedScope
```
public IScope peekIsolatedScope()
```
    Specified by:
    
    peekIsolatedScope in interface ISymbolTable
    
    Returns:
    
    the top-most isolated scope
  - getDefaultSymbolTable
```
protected ISymbolTable getDefaultSymbolTable()
```
  - clearDefaultSymbolTable
```
public void clearDefaultSymbolTable()
```
  - getThreadLocalSymbolTable
```
protected abstract ISymbolTable getThreadLocalSymbolTable()
```
    Get a thread-local symbol table. This is typically an instance of StandardSymbol table you maintain in a simple ThreadLocal.

Class ThreadSafeSymbolTable

Field Summary

Fields inherited from interface gw.lang.parser.IStackProvider

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ThreadSafeSymbolTable

Method Detail

copy

getSymbol

putSymbol

removeSymbol

getSymbols

getSymbols

getTotalSymbolCount

getScopeCount

getPrivateGlobalScopeCount

pushScope

pushScope

pushPrivateGlobalScope

popGlobalScope

popScope

peekScope

peekScope

popScope

pushIsolatedScope

defineCommonSymbols

getNextStackIndex

getNextStackIndexForScope

hasIsolatedScope

getThisSymbolFromStackOrMap

getTargetSymbolTable

isSymbolWithinScope

peekIsolatedScope

getDefaultSymbolTable

clearDefaultSymbolTable

getThreadLocalSymbolTable