C# Class Spring.Expressions.Parser.antlr.ASTFactory

AST Support code shared by TreeParser and Parser.

We use delegation to share code (and have only one bit of code to maintain) rather than subclassing or superclassing (forces AST support code to be loaded even when you don't want to do AST stuff).

Typically, setASTNodeType is used to specify the homogeneous type of node to create, but you can override create() to make heterogeneous nodes etc...

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Protected Properties

Property	Type	Description
defaultASTNodeTypeObject_	Type
defaultCreator_	ASTNodeCreator
heteroList_	FactoryEntry[]
typename2creator_	Hashtable

Public Methods

Method	Description
ASTFactory ( ) : System	Constructs an `ASTFactory` with the default AST node type of antlr.CommonAST.
ASTFactory ( Type nodeType ) : System	Constructs an `ASTFactory` and use the specified AST node type as the default.
ASTFactory ( string nodeTypeName ) : System	Constructs an `ASTFactory` and use the specified AST node type as the default.
addASTChild ( ASTPair &currentAST, Spring.Expressions.Parser.antlr.collections.AST child ) : void	Add a child to the current AST
create ( ) : Spring.Expressions.Parser.antlr.collections.AST	Creates a new uninitialized AST node. Since a specific AST Node Type wasn't indicated, the new AST node is created using the current default AST Node type - defaultASTNodeTypeObject_
create ( IToken tok ) : Spring.Expressions.Parser.antlr.collections.AST	Creates and initializes a new AST node using the specified Token instance. The System.Type used for creating this new AST node is determined by the following: the current TokenTypeID-to-ASTNodeType mapping (if any) or, the defaultASTNodeTypeObject_ otherwise
create ( IToken tok, string ASTNodeTypeName ) : Spring.Expressions.Parser.antlr.collections.AST	Creates a new AST node using the specified AST Node Type name. Once created, the new AST node is initialized with the specified Token instance. The System.Type used for creating this new AST node is determined solely by `ASTNodeTypeName`. The AST Node type must have a default/parameterless constructor.
create ( Spring.Expressions.Parser.antlr.collections.AST aNode ) : Spring.Expressions.Parser.antlr.collections.AST	Creates and initializes a new AST node using the specified AST Node instance. the new AST node is initialized with the specified Token type ID and string. The System.Type used for creating this new AST node is determined solely by `aNode`. The AST Node type must have a default/parameterless constructor.
create ( int type ) : Spring.Expressions.Parser.antlr.collections.AST	Creates and initializes a new AST node using the specified Token Type ID. The System.Type used for creating this new AST node is determined by the following: the current TokenTypeID-to-ASTNodeType mapping (if any) or, the defaultASTNodeTypeObject_ otherwise
create ( int type, string txt ) : Spring.Expressions.Parser.antlr.collections.AST	Creates and initializes a new AST node using the specified Token Type ID. The System.Type used for creating this new AST node is determined by the following: the current TokenTypeID-to-ASTNodeType mapping (if any) or, the defaultASTNodeTypeObject_ otherwise
create ( int type, string txt, string ASTNodeTypeName ) : Spring.Expressions.Parser.antlr.collections.AST	Creates a new AST node using the specified AST Node Type name. Once created, the new AST node is initialized with the specified Token type ID and string. The System.Type used for creating this new AST node is determined solely by `ASTNodeTypeName`. The AST Node type must have a default/parameterless constructor.
dup ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST	Returns a copy of the specified AST Node instance. The copy is obtained by using the ICloneable method Clone().
dupList ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST	Duplicate AST Node tree rooted at specified AST node and all of it's siblings.
dupTree ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST	Duplicate AST Node tree rooted at specified AST node. Ignore it's siblings.
error ( string e ) : void	To change where error messages go, can subclass/override this method and then setASTFactory in Parser and TreeParser. This method removes a prior dependency on class antlr.Tool.
make ( ) : Spring.Expressions.Parser.antlr.collections.AST	Make a tree from a list of nodes. The first element in the array is the root. If the root is null, then the tree is a simple list not a tree. Handles null children nodes correctly. For example, build(a, b, null, c) yields tree (a b c). build(null,a,b) yields tree (nil a b).
make ( Spring.Expressions.Parser.antlr.collections.impl.ASTArray nodes ) : Spring.Expressions.Parser.antlr.collections.AST	Make a tree from a list of nodes, where the nodes are contained in an ASTArray object.
makeASTRoot ( ASTPair &currentAST, Spring.Expressions.Parser.antlr.collections.AST root ) : void	Make an AST the root of current AST.
setASTNodeCreator ( ASTNodeCreator creator ) : void	Register an ASTNodeCreator to be used for creating node by default.
setASTNodeType ( string t ) : void	Sets the global default AST Node Type for this ASTFactory instance. This method also attempts to load the System.Type instance for the specified typename.
setMaxNodeType ( int NodeType ) : void	Pre-expands the internal list of TokenTypeID-to-ASTNodeType mappings to the specified size. This is primarily a convenience method that can be used to prevent unnecessary and costly re-org of the mappings list.
setTokenTypeASTNodeCreator ( int NodeType, ASTNodeCreator creator ) : void	Register an ASTNodeCreator for a given Token type ID.
setTokenTypeASTNodeType ( int tokenType, string NodeTypeName ) : void	Specify an "override" for the AST type created for the specified Token type. This method is useful for situations that ANTLR cannot oridinarily deal with (i.e., when you create a token based upon a nonliteral token symbol like #[LT(1)]. This is a runtime value and ANTLR cannot determine the token type (and hence the AST) statically.

Private Methods

Method	Description
createFromAST ( Spring.Expressions.Parser.antlr.collections.AST node ) : Spring.Expressions.Parser.antlr.collections.AST
createFromNodeName ( string nodeTypeName ) : Spring.Expressions.Parser.antlr.collections.AST
createFromNodeType ( int nodeTypeIndex ) : Spring.Expressions.Parser.antlr.collections.AST
createFromNodeTypeObject ( Type nodeTypeObject ) : Spring.Expressions.Parser.antlr.collections.AST
loadNodeTypeObject ( string nodeTypeName ) : Type
registerFactory ( int NodeType, string NodeTypeName ) : void

Method Details

ASTFactory() public method

Constructs an ASTFactory with the default AST node type of antlr.CommonAST.

public ASTFactory ( ) : System
return	System

ASTFactory() public method

Constructs an ASTFactory and use the specified AST node type as the default.

public ASTFactory ( Type nodeType ) : System
nodeType	System.Type	/// MetaType of default AST node type for this factory. ///
return	System

ASTFactory() public method

Constructs an ASTFactory and use the specified AST node type as the default.

public ASTFactory ( string nodeTypeName ) : System
nodeTypeName	string	/// Name of default AST node type for this factory. ///
return	System

addASTChild() public method

Add a child to the current AST

public addASTChild ( ASTPair &currentAST, Spring.Expressions.Parser.antlr.collections.AST child ) : void
currentAST	ASTPair	The AST to add a child to
child	Spring.Expressions.Parser.antlr.collections.AST	The child AST to be added
return	void

create() public method

Creates a new uninitialized AST node. Since a specific AST Node Type wasn't indicated, the new AST node is created using the current default AST Node type - defaultASTNodeTypeObject_

public create ( ) : Spring.Expressions.Parser.antlr.collections.AST
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

Creates and initializes a new AST node using the specified Token instance. The System.Type used for creating this new AST node is determined by the following: the current TokenTypeID-to-ASTNodeType mapping (if any) or, the defaultASTNodeTypeObject_ otherwise

public create ( IToken tok ) : Spring.Expressions.Parser.antlr.collections.AST
tok	IToken	Token instance to be used to create new AST Node.
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

Creates a new AST node using the specified AST Node Type name.

Once created, the new AST node is initialized with the specified Token instance. The System.Type used for creating this new AST node is determined solely by ASTNodeTypeName.

The AST Node type must have a default/parameterless constructor.

public create ( IToken tok, string ASTNodeTypeName ) : Spring.Expressions.Parser.antlr.collections.AST
tok	IToken	Token instance to be used to initialize the new AST Node.
ASTNodeTypeName	string	/// Fully qualified name of the Type to be used for creating the new AST Node. ///
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

Creates and initializes a new AST node using the specified AST Node instance. the new AST node is initialized with the specified Token type ID and string. The System.Type used for creating this new AST node is determined solely by aNode. The AST Node type must have a default/parameterless constructor.

public create ( Spring.Expressions.Parser.antlr.collections.AST aNode ) : Spring.Expressions.Parser.antlr.collections.AST
aNode	Spring.Expressions.Parser.antlr.collections.AST	AST Node instance to be used for creating the new AST Node.
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

Creates and initializes a new AST node using the specified Token Type ID. The System.Type used for creating this new AST node is determined by the following: the current TokenTypeID-to-ASTNodeType mapping (if any) or, the defaultASTNodeTypeObject_ otherwise

public create ( int type ) : Spring.Expressions.Parser.antlr.collections.AST
type	int	Token type ID to be used to create new AST Node.
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

public create ( int type, string txt ) : Spring.Expressions.Parser.antlr.collections.AST
type	int	Token type ID to be used to create new AST Node.
txt	string	Text for initializing the new AST Node.
return	Spring.Expressions.Parser.antlr.collections.AST

create() public method

Creates a new AST node using the specified AST Node Type name. Once created, the new AST node is initialized with the specified Token type ID and string. The System.Type used for creating this new AST node is determined solely by ASTNodeTypeName. The AST Node type must have a default/parameterless constructor.

public create ( int type, string txt, string ASTNodeTypeName ) : Spring.Expressions.Parser.antlr.collections.AST
type	int	Token type ID to be used to create new AST Node.
txt	string	Text for initializing the new AST Node.
ASTNodeTypeName	string	Fully qualified name of the Type to be used for creating the new AST Node.
return	Spring.Expressions.Parser.antlr.collections.AST

dup() public method

Returns a copy of the specified AST Node instance. The copy is obtained by using the ICloneable method Clone().

public dup ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST
t	Spring.Expressions.Parser.antlr.collections.AST	AST Node to copy.
return	Spring.Expressions.Parser.antlr.collections.AST

dupList() public method

Duplicate AST Node tree rooted at specified AST node and all of it's siblings.

public dupList ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST
t	Spring.Expressions.Parser.antlr.collections.AST	Root of AST Node tree.
return	Spring.Expressions.Parser.antlr.collections.AST

dupTree() public method

Duplicate AST Node tree rooted at specified AST node. Ignore it's siblings.

public dupTree ( Spring.Expressions.Parser.antlr.collections.AST t ) : Spring.Expressions.Parser.antlr.collections.AST
t	Spring.Expressions.Parser.antlr.collections.AST	Root of AST Node tree.
return	Spring.Expressions.Parser.antlr.collections.AST

error() public method

To change where error messages go, can subclass/override this method and then setASTFactory in Parser and TreeParser. This method removes a prior dependency on class antlr.Tool.

public error ( string e ) : void
e	string
return	void

make() public method

Make a tree from a list of nodes. The first element in the array is the root. If the root is null, then the tree is a simple list not a tree. Handles null children nodes correctly. For example, build(a, b, null, c) yields tree (a b c). build(null,a,b) yields tree (nil a b).

public make ( ) : Spring.Expressions.Parser.antlr.collections.AST
return	Spring.Expressions.Parser.antlr.collections.AST

make() public method

Make a tree from a list of nodes, where the nodes are contained in an ASTArray object.

public make ( Spring.Expressions.Parser.antlr.collections.impl.ASTArray nodes ) : Spring.Expressions.Parser.antlr.collections.AST
nodes	Spring.Expressions.Parser.antlr.collections.impl.ASTArray	List of Nodes.
return	Spring.Expressions.Parser.antlr.collections.AST

makeASTRoot() public method

Make an AST the root of current AST.

public makeASTRoot ( ASTPair &currentAST, Spring.Expressions.Parser.antlr.collections.AST root ) : void
currentAST	ASTPair
root	Spring.Expressions.Parser.antlr.collections.AST
return	void

setASTNodeCreator() public method

public setASTNodeCreator ( ASTNodeCreator creator ) : void
creator	ASTNodeCreator	The ASTNodeCreator.
return	void

setASTNodeType() public method

Sets the global default AST Node Type for this ASTFactory instance. This method also attempts to load the System.Type instance for the specified typename.

public setASTNodeType ( string t ) : void
t	string	Fully qualified AST Node Type name.
return	void

setMaxNodeType() public method

Pre-expands the internal list of TokenTypeID-to-ASTNodeType mappings to the specified size. This is primarily a convenience method that can be used to prevent unnecessary and costly re-org of the mappings list.

public setMaxNodeType ( int NodeType ) : void
NodeType	int	Maximum Token Type ID.
return	void

setTokenTypeASTNodeCreator() public method

public setTokenTypeASTNodeCreator ( int NodeType, ASTNodeCreator creator ) : void
NodeType	int	The Token type ID.
creator	ASTNodeCreator	The creater to register.
return	void

setTokenTypeASTNodeType() public method

Specify an "override" for the AST type created for the specified Token type.

This method is useful for situations that ANTLR cannot oridinarily deal with (i.e., when you create a token based upon a nonliteral token symbol like #[LT(1)]. This is a runtime value and ANTLR cannot determine the token type (and hence the AST) statically.

public setTokenTypeASTNodeType ( int tokenType, string NodeTypeName ) : void
tokenType	int	Token type to override.
NodeTypeName	string	/// Fully qualified AST typename (or null to specify /// the factory's default AST type). ///
return	void

Property Details

defaultASTNodeTypeObject_ protected_oe property

Stores the Type of the default AST node class to be used during tree construction.

protected Type defaultASTNodeTypeObject_
return	Type

defaultCreator_ protected_oe property

protected ASTNodeCreator defaultCreator_
return	ASTNodeCreator

heteroList_ protected_oe property

Stores the mapping between custom AST NodeTypes and their NodeTypeName/NodeTypeClass and ASTNodeCreator.

protected FactoryEntry[] heteroList_
return	FactoryEntry[]

typename2creator_ protected_oe property

Stores the mapping between AST node typenames and their token ID.

protected Hashtable typename2creator_
return	Hashtable