com.google.javascript.jscomp.graph

Class FixedPointGraphTraversal<N,E>

java.lang.Object

com.google.javascript.jscomp.graph.FixedPointGraphTraversal<N,E>

Type Parameters:

N - Value type that the graph node stores.

E - Value type that the graph edge stores.

public final class FixedPointGraphTraversal<N,E>
extends Object

A utility class for doing fixed-point computations. We traverse the edges over the given directed graph until the graph reaches a steady state.

Author:

[email protected] (Nick Santos)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	FixedPointGraphTraversal.EdgeCallback<Node,Edge> Edge callback

Field Summary

Fields

Modifier and Type	Field and Description
static String	NON_HALTING_ERROR_MSG

Constructor Summary

Constructors

Constructor and Description
FixedPointGraphTraversal(FixedPointGraphTraversal.EdgeCallback<N,E> callback) Create a new traversal.

Method Summary

Methods

Modifier and Type	Method and Description
void	computeFixedPoint(DiGraph<N,E> graph) Compute a fixed point for the given graph.
void	computeFixedPoint(DiGraph<N,E> graph, N entry) Compute a fixed point for the given graph, entering from the given node.
void	computeFixedPoint(DiGraph<N,E> graph, Set<N> entrySet) Compute a fixed point for the given graph, entering from the given nodes.
static <NODE,EDGE> FixedPointGraphTraversal<NODE,EDGE>	newTraversal(FixedPointGraphTraversal.EdgeCallback<NODE,EDGE> callback) Helper method for creating new traversals.

Methods inherited from class java.lang.Object

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

Field Detail

NON_HALTING_ERROR_MSG

public static final String NON_HALTING_ERROR_MSG

See Also:

Constant Field Values

Constructor Detail

FixedPointGraphTraversal

public FixedPointGraphTraversal(FixedPointGraphTraversal.EdgeCallback<N,E> callback)

Create a new traversal.

Parameters:

callback - A callback for updating the state of the graph each time an edge is traversed.

Method Detail

newTraversal

public static <NODE,EDGE> FixedPointGraphTraversal<NODE,EDGE> newTraversal(FixedPointGraphTraversal.EdgeCallback<NODE,EDGE> callback)

Helper method for creating new traversals.

computeFixedPoint

public void computeFixedPoint(DiGraph<N,E> graph)

Compute a fixed point for the given graph.

Parameters:

graph - The graph to traverse.

computeFixedPoint

public void computeFixedPoint(DiGraph<N,E> graph,
                     N entry)

Compute a fixed point for the given graph, entering from the given node.

Parameters:

graph - The graph to traverse.

entry - The node to begin traversing from.

computeFixedPoint

public void computeFixedPoint(DiGraph<N,E> graph,
                     Set<N> entrySet)

Compute a fixed point for the given graph, entering from the given nodes.

Parameters:

graph - The graph to traverse.

entrySet - The nodes to begin traversing from.