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package org.jsoup.select;
import org.jsoup.nodes.Node;
/**
* Node visitor interface. Provide an implementing class to {@link NodeTraversor} to iterate through nodes.
* <p/>
* This interface provides two methods, {@code head} and {@code tail}. The head method is called when the node is first
* seen, and the tail method when all of the node's children have been visited. As an example, head can be used to
* create a start tag for a node, and tail to create the end tag.
*/
public interface NodeVisitor {
/**
* Callback for when a node is first visited.
*
* @param node the node being visited.
* @param depth the depth of the node, relative to the root node. E.g., the root node has depth 0, and a child node
* of that will have depth 1.
*/
public void head(Node node, int depth);
/**
* Callback for when a node is last visited, after all of its descendants have been visited.
*
* @param node the node being visited.
* @param depth the depth of the node, relative to the root node. E.g., the root node has depth 0, and a child node
* of that will have depth 1.
*/
public void tail(Node node, int depth);
}
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