graphql.language

Class NodeTraverser

java.lang.Object

graphql.language.NodeTraverser

@PublicApi
public class NodeTraverser
extends java.lang.Object

Lets you traverse a Node tree.

Constructor Summary

Constructors

Constructor and Description
NodeTraverser()
NodeTraverser(java.util.Map<java.lang.Class<?>,java.lang.Object> rootVars, java.util.function.Function<? super Node,? extends java.util.List<Node>> getChildren)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	depthFirst(NodeVisitor nodeVisitor, java.util.Collection<? extends Node> roots) depthFirst traversal with a enter/leave phase.
java.lang.Object	depthFirst(NodeVisitor nodeVisitor, Node root) depthFirst traversal with a enter/leave phase.
static <T> T	oneVisitWithResult(Node node, NodeVisitor nodeVisitor)
java.lang.Object	postOrder(NodeVisitor nodeVisitor, java.util.Collection<? extends Node> roots) Post-Order traversal: This is a specialized version of depthFirst with only the leave phase.
java.lang.Object	postOrder(NodeVisitor nodeVisitor, Node root) Version of postOrder(NodeVisitor, Collection) with one root.
java.lang.Object	preOrder(NodeVisitor nodeVisitor, java.util.Collection<? extends Node> roots) Pre-Order traversal: This is a specialized version of depthFirst with only the enter phase.
java.lang.Object	preOrder(NodeVisitor nodeVisitor, Node root) Version of preOrder(NodeVisitor, Collection) with one root.

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeTraverser

public NodeTraverser(java.util.Map<java.lang.Class<?>,java.lang.Object> rootVars,
                     java.util.function.Function<? super Node,? extends java.util.List<Node>> getChildren)

NodeTraverser

public NodeTraverser()

Method Detail

depthFirst

public java.lang.Object depthFirst(NodeVisitor nodeVisitor,
                                   Node root)

depthFirst traversal with a enter/leave phase.

Parameters:

nodeVisitor - the visitor of the nodes

root - the root node

Returns:

the accumulation result of this traversal

depthFirst

public java.lang.Object depthFirst(NodeVisitor nodeVisitor,
                                   java.util.Collection<? extends Node> roots)

depthFirst traversal with a enter/leave phase.

Parameters:

nodeVisitor - the visitor of the nodes

roots - the root nodes

Returns:

the accumulation result of this traversal

preOrder

public java.lang.Object preOrder(NodeVisitor nodeVisitor,
                                 Node root)

Version of preOrder(NodeVisitor, Collection) with one root.

Parameters:

nodeVisitor - the visitor of the nodes

root - the root node

Returns:

the accumulation result of this traversal

preOrder

public java.lang.Object preOrder(NodeVisitor nodeVisitor,
                                 java.util.Collection<? extends Node> roots)

Pre-Order traversal: This is a specialized version of depthFirst with only the enter phase.

Parameters:

nodeVisitor - the visitor of the nodes

roots - the root nodes

Returns:

the accumulation result of this traversal

postOrder

public java.lang.Object postOrder(NodeVisitor nodeVisitor,
                                  Node root)

Version of postOrder(NodeVisitor, Collection) with one root.

Parameters:

nodeVisitor - the visitor of the nodes

root - the root node

Returns:

the accumulation result of this traversal

postOrder

public java.lang.Object postOrder(NodeVisitor nodeVisitor,
                                  java.util.Collection<? extends Node> roots)

Post-Order traversal: This is a specialized version of depthFirst with only the leave phase.

Parameters:

nodeVisitor - the visitor of the nodes

roots - the root nodes

Returns:

the accumulation result of this traversal

oneVisitWithResult

public static <T> T oneVisitWithResult(Node node,
                                       NodeVisitor nodeVisitor)