ptolemy.actor.lib.image
Class ImageReader
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.Source
ptolemy.actor.lib.image.ImageReader
- 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 ImageReader
- extends Source
This actor reads an Image from a FileParameter, and outputs it as an
AWTImageToken.
FIXME: It would be nice if we could read images from stdin.
- Since:
- Ptolemy II 3.0
- Version:
- $Id: ImageReader.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Christopher Hylands
- See Also:
FileParameter
,
AWTImageToken
,
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 |
ImageReader(CompositeEntity container,
java.lang.String name)
Construct an actor with the given container and name. |
Method Summary |
void |
attributeChanged(Attribute attribute)
If the specified attribute is URL, then close
the current file (if there is one) and open the new one. |
void |
fire()
Output the data read in the prefire. |
void |
initialize()
Open the file at the URL, and set the width of the output. |
boolean |
prefire()
Read in an image. |
Methods inherited from class ptolemy.actor.AtomicActor |
_actorFiring, _actorFiring, addActorFiringListener, addInitializable, clone, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, 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, 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 |
fileOrURL
public FileParameter fileOrURL
- The file name or URL from which to read. This is a string with
any form accepted by File Attribute.
- See Also:
FileParameter
_image
private java.awt.Image _image
_url
private java.net.URL _url
ImageReader
public ImageReader(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.
attributeChanged
public void attributeChanged(Attribute attribute)
throws IllegalActionException
- If the specified attribute is URL, then close
the current file (if there is one) and open the new one.
- Overrides:
attributeChanged
in class NamedObj
- Parameters:
attribute
- The attribute that has changed.
- Throws:
IllegalActionException
- If the specified attribute
is URL and the file cannot be opened.
fire
public void fire()
throws IllegalActionException
- Output the data read in the prefire.
- Specified by:
fire
in interface Executable
- Overrides:
fire
in class Source
- Throws:
IllegalActionException
- If there's no director.
initialize
public void initialize()
throws IllegalActionException
- Open the file at the URL, and set the width of the output.
- Specified by:
initialize
in interface Initializable
- Overrides:
initialize
in class AtomicActor
- Throws:
IllegalActionException
- If a derived class throws it.
prefire
public boolean prefire()
throws IllegalActionException
- Read in an image.
- Specified by:
prefire
in interface Executable
- Overrides:
prefire
in class Source
- Returns:
- True, unless the trigger input is connected
and has no input.
- Throws:
IllegalActionException
- If an IO error occurs.