java.lang.Object

com.northconcepts.datapipeline.core.NodeVisitor

All Implemented Interfaces:: INodeVisitor

public abstract class NodeVisitor extends Object implements INodeVisitor

Base INodeVisitor whose callbacks do nothing; override only the ones you need and walk a tree with visit(Node, INodeVisitor).

Constructor Summary

Constructors

Constructor

Description

NodeVisitor()
Method Summary

Modifier and Type

Method

Description

void

endArray(ArrayValue array)

Called after all of the array's elements have been visited.

void

endArrayValue(ArrayValue array, int index, ValueNode<?> value)

Called after the element at the given 0-based index has been visited.

void

endField(Field field)

Called last for a field, after INodeVisitor.endFieldValue(Field, ValueNode).

void

endFieldValue(Field field, ValueNode<?> value)

Called after the field's value node has been visited.

void

endRecord(Record record)

Called after all of the record's fields have been visited.

void

singleValue(SingleValue value)

Called for each single (leaf) value; it has no matching end callback.

void

startArray(ArrayValue array)

Called before the array's elements are visited.

void

startArrayValue(ArrayValue array, int index, ValueNode<?> value)

Called before the element at the given 0-based index is visited.

void

startField(Field field)

Called when a field is reached, before INodeVisitor.startFieldValue(Field, ValueNode).

void

startFieldValue(Field field, ValueNode<?> value)

Called before the field's value node is visited.

void

startRecord(Record record)

Called before the record's fields are visited.

static void

visit(Node node, INodeVisitor visitor)

Walks the node and its descendants depth-first, calling the visitor's callbacks; does nothing for a null node and rethrows failures as a DataException.

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

Constructor Details
- NodeVisitor
  
  public NodeVisitor()
Method Details
- startRecord
  
  public void startRecord(Record record) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called before the record's fields are visited.
  
  Specified by:
  
  startRecord in interface INodeVisitor
  
  Throws:
  
  Throwable
- endRecord
  
  public void endRecord(Record record) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called after all of the record's fields have been visited.
  
  Specified by:
  
  endRecord in interface INodeVisitor
  
  Throws:
  
  Throwable
- startField
  
  public void startField(Field field) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called when a field is reached, before INodeVisitor.startFieldValue(Field, ValueNode).
  
  Specified by:
  
  startField in interface INodeVisitor
  
  Throws:
  
  Throwable
- endField
  
  public void endField(Field field) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called last for a field, after INodeVisitor.endFieldValue(Field, ValueNode).
  
  Specified by:
  
  endField in interface INodeVisitor
  
  Throws:
  
  Throwable
- startFieldValue
  
  public void startFieldValue(Field field, ValueNode<?> value) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called before the field's value node is visited.
  
  Specified by:
  
  startFieldValue in interface INodeVisitor
  
  Throws:
  
  Throwable
- endFieldValue
  
  public void endFieldValue(Field field, ValueNode<?> value) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called after the field's value node has been visited.
  
  Specified by:
  
  endFieldValue in interface INodeVisitor
  
  Throws:
  
  Throwable
- startArray
  
  public void startArray(ArrayValue array) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called before the array's elements are visited.
  
  Specified by:
  
  startArray in interface INodeVisitor
  
  Throws:
  
  Throwable
- endArray
  
  public void endArray(ArrayValue array) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called after all of the array's elements have been visited.
  
  Specified by:
  
  endArray in interface INodeVisitor
  
  Throws:
  
  Throwable
- startArrayValue
  
  public void startArrayValue(ArrayValue array, int index, ValueNode<?> value) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called before the element at the given 0-based index is visited.
  
  Specified by:
  
  startArrayValue in interface INodeVisitor
  
  Throws:
  
  Throwable
- endArrayValue
  
  public void endArrayValue(ArrayValue array, int index, ValueNode<?> value) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called after the element at the given 0-based index has been visited.
  
  Specified by:
  
  endArrayValue in interface INodeVisitor
  
  Throws:
  
  Throwable
- singleValue
  
  public void singleValue(SingleValue value) throws Throwable
  
  Description copied from interface: INodeVisitor
  
  Called for each single (leaf) value; it has no matching end callback.
  
  Specified by:
  
  singleValue in interface INodeVisitor
  
  Throws:
  
  Throwable
- visit
  
  public static void visit(Node node, INodeVisitor visitor)
  
  Walks the node and its descendants depth-first, calling the visitor's callbacks; does nothing for a null node and rethrows failures as a DataException.

Class NodeVisitor

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Details

NodeVisitor

Method Details

startRecord

endRecord

startField

endField

startFieldValue

endFieldValue

startArray

endArray

startArrayValue

endArrayValue

singleValue

visit