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## org.apache.commons.configuration
Class HierarchicalConfiguration.NodeVisitor

    java.lang.Object
      org.apache.commons.configuration.HierarchicalConfiguration.NodeVisitor

Direct Known Subclasses:
  HierarchicalConfiguration.BuilderVisitor, HierarchicalConfigurationXMLReader.SAXVisitor

Enclosing class:
  HierarchicalConfiguration

    public static class HierarchicalConfiguration.NodeVisitor

extends Object

Definition of a visitor class for traversing a node and all of its children.

This class defines the interface of a visitor for `Node` objects and provides a default implementation. The method `visit()` of `Node` implements a generic iteration algorithm based on the Visitor pattern. By providing different implementations of visitors it is possible to collect different data during the iteration process.

Constructor Summary
`HierarchicalConfiguration.NodeVisitor()`

Method Summary
`boolean` | `terminate()` Returns a flag that indicates if iteration should be stopped.
`void` | `visitAfterChildren(HierarchicalConfiguration.Node node, ConfigurationKey key)` Visits the specified node after its children have been processed.
`void` | `visitBeforeChildren(HierarchicalConfiguration.Node node, ConfigurationKey key)` Visits the specified node.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### HierarchicalConfiguration.NodeVisitor

    public HierarchicalConfiguration.NodeVisitor()

Method Detail

### visitBeforeChildren

    public void visitBeforeChildren(HierarchicalConfiguration.Node node,
                                    ConfigurationKey key)

  Visits the specified node. This method is called during iteration for each node before its children have been visited.

  Parameters:
    `node` - the actual node
    `key` - the key of this node (may be null )

### visitAfterChildren

    public void visitAfterChildren(HierarchicalConfiguration.Node node,
                                   ConfigurationKey key)

  Visits the specified node after its children have been processed. This gives a visitor the opportunity of collecting additional data after the child nodes have been visited.

  Parameters:
    `node` - the node to be visited
    `key` - the key of this node (may be null )

### terminate

    public boolean terminate()

  Returns a flag that indicates if iteration should be stopped. This method is called after each visited node. It can be useful for visitors that search a specific node. If this node is found, the whole process can be stopped. This base implementation always returns false .

  Returns:
    a flag if iteration should be stopped

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