ariba.util.expr
Interface Node

All Known Implementing Classes:

ExpressionNode, SimpleNode

public interface Node

JJTree interface for AST nodes, as modified to handle the AribaExpr operations getValue and setValue. JJTree's original comment: All AST nodes must implement this interface. It provides basic machinery for constructing the parent and child relationships between nodes.

Author:

Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)

Method Summary

void	accept(ASTNodeVisitor visitor)
TypeInfo	getTypeInfo()
java.lang.Object	getValue(ExprContext context, java.lang.Object source) Extracts the value from the given source object that is appropriate for this node within the given context.
void	jjtAddChild(Node n, int i) This method tells the node to add its argument to the node's list of children.
void	jjtClose() This method is called after all the child nodes have been added.
Node	jjtGetChild(int i) This method returns a child node.
int	jjtGetNumChildren() Return the number of children the node has.
Node	jjtGetParent()
void	jjtOpen() This method is called after the node has been made the current node.
void	jjtSetParent(Node n) This pair of methods are used to inform the node of its parent.
void	setTypeInfo(TypeInfo typeInfo)
void	setValue(ExprContext context, java.lang.Object target, java.lang.Object value) Sets the given value in the given target as appropriate for this node within the given context.

Method Detail

jjtOpen

void jjtOpen()

This method is called after the node has been made the current node. It indicates that child nodes can now be added to it.

jjtClose

void jjtClose()

This method is called after all the child nodes have been added.

jjtSetParent

void jjtSetParent(Node n)

This pair of methods are used to inform the node of its parent.

jjtGetParent

Node jjtGetParent()

jjtAddChild

void jjtAddChild(Node n,
                 int i)

This method tells the node to add its argument to the node's list of children.

jjtGetChild

Node jjtGetChild(int i)

This method returns a child node. The children are numbered from zero, left to right.

jjtGetNumChildren

int jjtGetNumChildren()

Return the number of children the node has.

getValue

java.lang.Object getValue(ExprContext context,
                          java.lang.Object source)
                          throws ExprException

Extracts the value from the given source object that is appropriate for this node within the given context.

Throws:

ExprException

setValue

void setValue(ExprContext context,
              java.lang.Object target,
              java.lang.Object value)
              throws ExprException

Sets the given value in the given target as appropriate for this node within the given context.

Throws:

ExprException

getTypeInfo

TypeInfo getTypeInfo()

setTypeInfo

void setTypeInfo(TypeInfo typeInfo)

accept

void accept(ASTNodeVisitor visitor)