Package org.apache.cayenne.exp
Class TraversalHelper
- java.lang.Object
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- org.apache.cayenne.exp.TraversalHelper
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- All Implemented Interfaces:
TraversalHandler
public class TraversalHelper extends Object implements TraversalHandler
Noop implementation of TraversalHandler. Useful as a superclass for partial implementations of TraversalHandler.
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Constructor Summary
Constructors Constructor Description TraversalHelper()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
endNode(Expression node, Expression parentNode)
Called during the traversal after an expression node children processing is finished.void
finishedChild(Expression node, int childIndex, boolean hasMoreChildren)
Called during traversal after a child of expression has been visited.void
objectNode(Object leaf, Expression parentNode)
Called during the traversal when a leaf non-expression node is encountered.void
startNode(Expression node, Expression parentNode)
Called during the traversal before an expression node children processing is started.
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Method Detail
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startNode
public void startNode(Expression node, Expression parentNode)
Description copied from interface:TraversalHandler
Called during the traversal before an expression node children processing is started.- Specified by:
startNode
in interfaceTraversalHandler
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endNode
public void endNode(Expression node, Expression parentNode)
Description copied from interface:TraversalHandler
Called during the traversal after an expression node children processing is finished.- Specified by:
endNode
in interfaceTraversalHandler
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finishedChild
public void finishedChild(Expression node, int childIndex, boolean hasMoreChildren)
Description copied from interface:TraversalHandler
Called during traversal after a child of expression has been visited.- Specified by:
finishedChild
in interfaceTraversalHandler
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objectNode
public void objectNode(Object leaf, Expression parentNode)
Description copied from interface:TraversalHandler
Called during the traversal when a leaf non-expression node is encountered.- Specified by:
objectNode
in interfaceTraversalHandler
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