org.apache.flink.table.plan

Class TreeNode<A extends TreeNode<A>>

java.lang.Object

org.apache.flink.table.plan.TreeNode<A>

All Implemented Interfaces:

scala.Equals, scala.Product

Direct Known Subclasses:

Expression, LogicalNode

public abstract class TreeNode<A extends TreeNode<A>>
extends Object
implements scala.Product

Generic base class for trees that can be transformed and traversed.

Constructor Summary

Constructors

Constructor and Description
TreeNode()

Method Summary

Modifier and Type	Method and Description
abstract scala.collection.Seq<A>	children() List of child nodes that should be considered when doing transformations.
boolean	fastEquals(TreeNode<?> other) Tests for equality by first testing for reference equality.
A	makeCopy(Object[] newArgs) Creates a new copy of this expression with new children.
A	postOrderTransform(scala.PartialFunction<A,A> rule) Do tree transformation in post order.
void	preOrderVisit(scala.Function1<A,scala.runtime.BoxedUnit> f) Runs the given function first on the node and then recursively on all its children.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface scala.Product

productArity, productElement, productIterator, productPrefix

Methods inherited from interface scala.Equals

canEqual, equals

Constructor Detail

TreeNode

public TreeNode()

Method Detail

children

public abstract scala.collection.Seq<A> children()

List of child nodes that should be considered when doing transformations. Other values in the Product will not be transformed, only handed through.

Returns:

(undocumented)

fastEquals

public boolean fastEquals(TreeNode<?> other)

Tests for equality by first testing for reference equality.

Parameters:

other - (undocumented)

Returns:

(undocumented)

postOrderTransform

public A postOrderTransform(scala.PartialFunction<A,A> rule)

Do tree transformation in post order.

Parameters:

rule - (undocumented)

Returns:

(undocumented)

preOrderVisit

public void preOrderVisit(scala.Function1<A,scala.runtime.BoxedUnit> f)

Runs the given function first on the node and then recursively on all its children.

Parameters:

f - (undocumented)

makeCopy

public A makeCopy(Object[] newArgs)

Creates a new copy of this expression with new children. This is used during transformation if children change.

Parameters:

newArgs - (undocumented)

Returns:

(undocumented)