com.google.javascript.jscomp

Class MemoizedScopeCreator

java.lang.Object

com.google.javascript.jscomp.MemoizedScopeCreator

All Implemented Interfaces:

ScopeCreator, StaticSymbolTable<TypedVar,TypedVar>

class MemoizedScopeCreator
extends java.lang.Object
implements ScopeCreator, StaticSymbolTable<TypedVar,TypedVar>

Memoize a scope creator. This allows you to make multiple passes, without worrying about the expense of generating Scope objects over and over again.

On the other hand, you also have to be more aware of what your passes are doing. Scopes are memoized stupidly, so if the underlying tree changes, the scope may be out of sync.

Only used to memoize typed scope creators, not untyped ones.

Field Summary

Fields

Modifier and Type	Field and Description
private ScopeCreator	delegate
private java.util.Map<Node,TypedScope>	scopes

Constructor Summary

Constructors

Constructor and Description
MemoizedScopeCreator(ScopeCreator delegate)

Method Summary

Modifier and Type	Method and Description
TypedScope	createScope(Node n, Scope parent) Creates a Scope object.
(package private) java.util.Collection<TypedScope>	getAllMemoizedScopes()
java.lang.Iterable<TypedVar>	getAllSymbols() Returns all variables in this symbol table.
java.lang.Iterable<TypedVar>	getReferences(TypedVar var) Returns the references that point to the given symbol.
TypedScope	getScope(TypedVar var) Returns the scope for a given symbol.
boolean	hasBlockScope()
(package private) void	removeScopesForScript(java.lang.String scriptName) Removes all scopes with root nodes from a given script file.

Methods inherited from class java.lang.Object

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

Field Detail

scopes

private final java.util.Map<Node,TypedScope> scopes

delegate

private final ScopeCreator delegate

Constructor Detail

MemoizedScopeCreator

MemoizedScopeCreator(ScopeCreator delegate)

Parameters:

delegate - The real source of Scope objects.

Method Detail

getReferences

public java.lang.Iterable<TypedVar> getReferences(TypedVar var)

Description copied from interface: StaticSymbolTable

Returns the references that point to the given symbol.

Specified by:

getReferences in interface StaticSymbolTable<TypedVar,TypedVar>

getScope

public TypedScope getScope(TypedVar var)

Description copied from interface: StaticSymbolTable

Returns the scope for a given symbol.

Specified by:

getScope in interface StaticSymbolTable<TypedVar,TypedVar>

getAllSymbols

public java.lang.Iterable<TypedVar> getAllSymbols()

Description copied from interface: StaticSymbolTable

Returns all variables in this symbol table.

Specified by:

getAllSymbols in interface StaticSymbolTable<TypedVar,TypedVar>

createScope

public TypedScope createScope(Node n,
                              Scope parent)

Description copied from interface: ScopeCreator

Creates a Scope object.

Specified by:

createScope in interface ScopeCreator

Parameters:

n - the root node (either a FUNCTION node, a SCRIPT node, or a synthetic block node whose children are all SCRIPT nodes)

parent - the parent Scope object (may be null)

getAllMemoizedScopes

java.util.Collection<TypedScope> getAllMemoizedScopes()

removeScopesForScript

void removeScopesForScript(java.lang.String scriptName)

Removes all scopes with root nodes from a given script file.

Parameters:

scriptName - the name of the script file to remove nodes for.

hasBlockScope

public boolean hasBlockScope()

Specified by:

hasBlockScope in interface ScopeCreator