ptolemy.actor.gt

Class GraphAnalyzer

java.lang.Object

ptolemy.actor.gt.GraphAnalyzer

Direct Known Subclasses:

GraphMatcher

public abstract class GraphAnalyzer
extends java.lang.Object

Superclass of classes that need to analyze the graph structures of models.

Since:

Ptolemy II 7.1

Version:

$Id$

Author:

Thomas Huining Feng

Pt.AcceptedRating:

Red (tfeng)

Pt.ProposedRating:

Yellow (tfeng)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GraphAnalyzer.IndexedList A pair of a list and an index number.
static class	GraphAnalyzer.IndexedLists A list of IndexedLists.
static class	GraphAnalyzer.Path A path between two ports.

Constructor Summary

Constructors

Constructor and Description
GraphAnalyzer()

Method Summary

Modifier and Type	Method and Description
protected boolean	_isIgnored(java.lang.Object object) Test whether an object should be ignored from analysis.
protected abstract boolean	_isOpaque(CompositeEntity entity) Test whether a composite entity should be considered as opaque.
protected abstract boolean	_relationCollapsing(NamedObj container) Test whether the relations contained in the container should be considered as collapsed, i.e., whether multiple connected relations should be considered as just one.
NamedObj	findFirstChild(CompositeEntity top, GraphAnalyzer.IndexedLists indexedLists, java.util.Collection<java.lang.Object> excludedObjects) Find the first child within the top composite entity.
boolean	findFirstPath(Port startPort, GraphAnalyzer.Path path, java.util.Set<? super Relation> visitedRelations, java.util.Set<? super Port> visitedPorts) Find the first path starting from the startPort, and store it in the path parameter if found.
NamedObj	findNextChild(CompositeEntity top, GraphAnalyzer.IndexedLists indexedLists, java.util.Collection<java.lang.Object> excludedObjects) Find the next child within the top composite entity.
boolean	findNextPath(GraphAnalyzer.Path path, java.util.Set<Relation> visitedRelations, java.util.Set<Port> visitedPorts) Find the next path, and store it in the path parameter if found.

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphAnalyzer

public GraphAnalyzer()

Method Detail

findFirstChild

public NamedObj findFirstChild(CompositeEntity top,
                               GraphAnalyzer.IndexedLists indexedLists,
                               java.util.Collection<java.lang.Object> excludedObjects)

Find the first child within the top composite entity. The child is either an atomic actor (AtomicActor) or an opaque composite entity, one that has a director in it. If the top composite entity does not have any child, null is returned.

Parameters:

top - The top composite entity in which the search is performed.

indexedLists - A list that is used to encode the composite entities visited.

excludedObjects - The atomic actor or opaque composite entities that should not be returned.

Returns:

The child found, or null if none.

See Also:

findNextChild(CompositeEntity, IndexedLists, Collection)

findFirstPath

public boolean findFirstPath(Port startPort,
                             GraphAnalyzer.Path path,
                             java.util.Set<? super Relation> visitedRelations,
                             java.util.Set<? super Port> visitedPorts)

Find the first path starting from the startPort, and store it in the path parameter if found. A path is a sequence of alternating ports (Port) and relations (Relation), starting and ending with two ports (which may be equal, in which case the path is a loop). If a path contains ports between the start port and the end port, those ports in between must be ports of a transparent composite entities (those with no directors inside). If no path is found starting from the startPort, null is returned.

Parameters:

startPort - The port from which the search starts.

path - The path to obtain the result.

visitedRelations - A set that records all the relations that have been visited during the search.

visitedPorts - A set that records all the ports that have been visited during the search.

Returns:

true if a path is found and stored in the path parameter; false otherwise.

See Also:

findNextPath(Path, Set, Set)

findNextChild

public NamedObj findNextChild(CompositeEntity top,
                              GraphAnalyzer.IndexedLists indexedLists,
                              java.util.Collection<java.lang.Object> excludedObjects)

Find the next child within the top composite entity. The child is either an atomic actor (AtomicActor) or an opaque composite entity, one that has a director in it. If the top composite entity does not have any more child, null is returned.

Parameters:

top - The top composite entity in which the search is performed.

indexedLists - A list that is used to encode the composite entities visited.

excludedObjects - The atomic actor or opaque composite entities that should not be returned.

Returns:

The child found, or null if none.

See Also:

findFirstChild(CompositeEntity, IndexedLists, Collection)

findNextPath

public boolean findNextPath(GraphAnalyzer.Path path,
                            java.util.Set<Relation> visitedRelations,
                            java.util.Set<Port> visitedPorts)

Find the next path, and store it in the path parameter if found. A path is a sequence of alternating ports (Port) and relations (Relation), starting and ending with two ports (which may be equal, in which case the path is a loop). If a path contains ports between the start port and the end port, those ports in between must be ports of a transparent composite entities (those with no directors inside). If no more path is found, null is returned.

Parameters:

path - The path to obtain the result.

visitedRelations - A set that records all the relations that have been visited during the search.

visitedPorts - A set that records all the ports that have been visited during the search.

Returns:

true if a path is found and stored in the path parameter; false otherwise.

See Also:

findFirstPath(Port, Path, Set, Set)

_isIgnored

protected boolean _isIgnored(java.lang.Object object)

Test whether an object should be ignored from analysis.

Parameters:

object - The object to be tested.

Returns:

true if the object should be ignored; false otherwise.

_isOpaque

protected abstract boolean _isOpaque(CompositeEntity entity)

Test whether a composite entity should be considered as opaque.

Parameters:

entity - The composite entity to be tested.

Returns:

true if the composite object should be considered as opaque; false otherwise.

_relationCollapsing

protected abstract boolean _relationCollapsing(NamedObj container)

Test whether the relations contained in the container should be considered as collapsed, i.e., whether multiple connected relations should be considered as just one.

Parameters:

container - The container.

Returns:

true if the relations should be considered as collapsed; false otherwise.