org.apache.xpath

Interface ExpressionNode

public interface ExpressionNode extends SourceLocator

A class that implements this interface can construct expressions, give information about child and parent expressions, and give the originating source information. A class that implements this interface does not lay any claim to being directly executable.

Note: This interface should not be considered stable. Only exprSetParent and exprGetParent can be counted on to work reliably. Work in progress.

Method Summary
void	exprAddChild(ExpressionNode n, int i) This method tells the node to add its argument to the node's list of children.
ExpressionNode	exprGetChild(int i) This method returns a child node.
int	exprGetNumChildren() Return the number of children the node has.
ExpressionNode	exprGetParent()
void	exprSetParent(ExpressionNode n) This pair of methods are used to inform the node of its parent.

Method Detail

exprAddChild

public void exprAddChild(ExpressionNode n, int i)

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

exprGetChild

public ExpressionNode exprGetChild(int i)

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

exprGetNumChildren

public int exprGetNumChildren()

Return the number of children the node has.

exprGetParent

public ExpressionNode exprGetParent()

exprSetParent

public void exprSetParent(ExpressionNode n)

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