ptolemy.actor.lib.image
Class URLToImage
java.lang.Object
ptolemy.kernel.util.NamedObj
ptolemy.kernel.InstantiableNamedObj
ptolemy.kernel.Entity
ptolemy.kernel.ComponentEntity
ptolemy.actor.AtomicActor
ptolemy.actor.TypedAtomicActor
ptolemy.actor.lib.Transformer
ptolemy.actor.lib.image.URLToImage
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, Actor, Executable, FiringsRecordable, Initializable, TypedActor, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class URLToImage
- extends Transformer
An actor that reads a String input token naming a URL and outputs an
Object Token that contains a java.awt.Image
It is possible to load a file
from the local file system by using the prefix "file://" instead of
"http://". Relative file paths are allowed. To specify a file
relative to the current directory, use "../" or "./". For example,
if the current directory contains a file called "test.jpg", then
sourceURL should be set to "file:./test.jpg". If the parent
directory contains a file called "test.jpg", then sourceURL
should be set to "file:../test.jpg". To reference the file
test.jpg, located at "/tmp/test.jpg", sourceURL
should be set to "file:///tmp/test.jpg" The default value is
"file:///tmp/test.jpg".
- Since:
- Ptolemy II 3.0
- Version:
- $Id: URLToImage.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Christopher Hylands
- See Also:
ImageReader,
Serialized Form
- Accepted Rating:
- Proposed Rating:
| Fields inherited from class ptolemy.kernel.util.NamedObj |
_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS |
|
Constructor Summary |
URLToImage(CompositeEntity container,
java.lang.String name)
Construct an actor with the given container and name. |
|
Method Summary |
void |
fire()
Read on StringToken from the input, and output an ObjectToken
that contains a java.awt.Image object to the output port. |
boolean |
prefire()
Return false if the input port has no token, otherwise return
what the superclass returns (presumably true). |
| Methods inherited from class ptolemy.actor.AtomicActor |
_actorFiring, _actorFiring, addActorFiringListener, addInitializable, clone, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, initialize, inputPortList, isFireFunctional, isStrict, iterate, newReceiver, outputPortList, postfire, preinitialize, pruneDependencies, recordFiring, removeActorFiringListener, removeDependency, removeInitializable, setContainer, stop, stopFire, terminate, wrapup |
| Methods inherited from class ptolemy.kernel.ComponentEntity |
_adjustDeferrals, _checkContainer, _getContainedObject, _propagateExistence, getContainer, instantiate, isAtomic, isOpaque, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, propagateExistence, setName |
| Methods inherited from class ptolemy.kernel.Entity |
_description, _exportMoMLContents, _removePort, _validateSettables, connectedPortList, connectedPorts, containedObjectsIterator, getAttribute, getPort, getPorts, linkedRelationList, linkedRelations, portList, removeAllPorts, setClassDefinition, uniqueName |
| Methods inherited from class ptolemy.kernel.util.NamedObj |
_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, addChangeListener, addDebugListener, attributeChanged, attributeList, attributeList, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getFullName, getModelErrorHandler, getName, getName, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateValue, propagateValues, removeChangeListener, removeDebugListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, validateSettables, workspace |
| Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
URLToImage
public URLToImage(CompositeEntity container,
java.lang.String name)
throws IllegalActionException,
NameDuplicationException
- Construct an actor with the given container and name.
- Parameters:
container - The container.name - The name of this actor.
- Throws:
IllegalActionException - If the actor cannot be contained
by the proposed container.
NameDuplicationException - If the container already has an
actor with this name.
fire
public void fire()
throws IllegalActionException
- Read on StringToken from the input, and output an ObjectToken
that contains a java.awt.Image object to the output port.
- Specified by:
fire in interface Executable- Overrides:
fire in class AtomicActor
- Throws:
IllegalActionException - If there's no director.
prefire
public boolean prefire()
throws IllegalActionException
- Return false if the input port has no token, otherwise return
what the superclass returns (presumably true).
- Specified by:
prefire in interface Executable- Overrides:
prefire in class AtomicActor
- Returns:
- True if this actor is ready for firing, false otherwise.
- Throws:
IllegalActionException - If there is no director.