to.etc.domui.util

Interface DomUtil.IPerNode

Enclosing class:

DomUtil

public static interface DomUtil.IPerNode

Functor interface to handle tree walking.

Author:

Frits Jalvingh Created on Nov 3, 2009

Field Summary

Fields

Modifier and Type	Field and Description
static Object	SKIP When this object instance is returned by the before(NodeBase) method we SKIP the downwards traversal.

Method Summary

Modifier and Type	Method and Description
Object	after(NodeBase n) Called when all child nodes of the specified node have been traversed.
Object	before(NodeBase n) Called when the node is first encountered in the tree.

Field Detail

SKIP

static final Object SKIP

When this object instance is returned by the before(NodeBase) method we SKIP the downwards traversal.

Method Detail

before

Object before(@Nonnull
              NodeBase n)
       throws Exception

Called when the node is first encountered in the tree. It can return null causing the rest of the tree to be traversed; if it returns the constant IPerNode.SKIP the subtree starting at this node will not be traversed but the rest of the tree will. When you return SKIP the after(NodeBase) method will not be called for this node. Returning any other value will stop the node traversal process and return that value to the caller of DomUtil.walkTree(NodeBase, IPerNode).

Parameters:

n -

Returns:

Throws:

Exception

after

Object after(@Nonnull
             NodeBase n)
      throws Exception

Called when all child nodes of the specified node have been traversed. When this returns a non-null value this will terminate the tree walk and return that value to the called of DomUtil.walkTree(NodeBase, IPerNode).

Parameters:

n -

Returns:

Throws:

Exception