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ognl
Interface Node

All Known Implementing Classes:: SimpleNode

public interface Node

JJTree interface for AST nodes, as modified to handle the OGNL 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.

Method Summary

java.lang.Object getValue(OgnlContext 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 setValue(OgnlContext 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

public 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

public void jjtClose()

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

jjtSetParent

public void jjtSetParent(Node n)

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

jjtGetParent

public Node jjtGetParent()

jjtAddChild

public void jjtAddChild(Node n,
                        int i)

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

jjtGetChild

public Node jjtGetChild(int i)

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

jjtGetNumChildren

public int jjtGetNumChildren()

Return the number of children the node has.

getValue

public java.lang.Object getValue(OgnlContext context,
                                 java.lang.Object source)
                          throws OgnlException

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

setValue

public void setValue(OgnlContext context,
                     java.lang.Object target,
                     java.lang.Object value)
              throws OgnlException

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