Package org.apache.cayenne.exp
Interface TraversalHandler
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- All Known Implementing Classes:
TraversalHelper
public interface TraversalHandler
Expression visitor interface. Defines callback methods invoked when walking the expression usingExpression.traverse(TraversalHandler)
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Method Summary
All Methods Instance Methods Abstract 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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finishedChild
void finishedChild(Expression node, int childIndex, boolean hasMoreChildren)
Called during traversal after a child of expression has been visited.
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startNode
void startNode(Expression node, Expression parentNode)
Called during the traversal before an expression node children processing is started.- Since:
- 1.1
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endNode
void endNode(Expression node, Expression parentNode)
Called during the traversal after an expression node children processing is finished.- Since:
- 1.1
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objectNode
void objectNode(Object leaf, Expression parentNode)
Called during the traversal when a leaf non-expression node is encountered.
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