Examples of com.lightcrafts.mediax.jai.PropertySource

com.lightcrafts.mediax.jai.PropertySource
An interface encapsulating the set of operations involved in identifying and reading properties.
The interface includes the getProperty() and getPropertyNames() methods familiar from the RenderedImage and RenderableImage interfaces. Classes which implement this interface should do so in a manner which treats the property names as case-retentive. That is to say that as concerns operations effected using the property name as a key, the operation should ignore the case of the property name while on the other hand the property name retrieval methods should return the names with their case preserved.
PropertySource is implemented by the ImageJAI interface and, among other classes, by PlanarImage, RenderableOp and CollectionImage. Since all RenderedImages used with JAI are "wrapped" by a RenderedImageAdapter, all JAI RenderedImages may be assumed to implement PropertySource.
If a PropertySource is also a PropertyChangeEmitter then it should fire PropertySourceChangeEvents to all registered listeners whenever this is reasonable to do so in the context of the PropertySource in question.
Property name space collisions may be prevented by adhering to an hierarchical naming convention. This could for example be based on the name of the package in question, e.g., com.lightcrafts.media.jai.MyProperty. The names of properties generated by JAI itself will not adhere to the aforementioned naming convention, but this should not pose a problem if users adopt this convention for their own property names.
Another approach to handling multiple property name spaces would be to define a separate PropertySource for each name space of properties. These PropertySources could themselves be attached to images as properties. Inheritance of these properties would occur by the default mechanism. Modification of these properties within an operation chain could be managed by PropertyGenerators which are capable of recognizing these properties. Note that a potential problem with this approach exists when a PropertySourceChangeEvent is fired: it might be necessary to clone the entire tree of properties in order to obtain the old value of event object. @see ImageJAI @see PlanarImage @see PropertyChangeEmitter @see WritablePropertySource @see java.awt.image.RenderedImage @see java.awt.image.renderable.RenderableImage

    }


    /** Gets a property from the property set of this image.  If the
      property is undefined the constant NULL_PROPERTY is returned. */
    public Object getProperty(Long id, String name) throws RemoteException {
        PropertySource ps = getPropertySource(id);
        Object property = ps.getProperty(name);
        if(property == null ||
           property.equals(java.awt.Image.UndefinedProperty)) {
            property = NULL_PROPERTY;
        }
        return property;

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     * Returns a list of names recognized by getProperty().
     *
     * @return an array of Strings representing proeprty names.
     */
    public String[] getPropertyNames(Long id) throws RemoteException {
        PropertySource ps = getPropertySource(id);
        return ps.getPropertyNames();
    }

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    /** Gets a property from the property set of this image.  If the
     *  property is undefined the constant NULL_PROPERTY is returned.
     */
    public Object getProperty(Long id, String name) throws RemoteException {


  PropertySource ps = getPropertySource(id);
  Object property = ps.getProperty(name);


  if (property == null ||
      property.equals(java.awt.Image.UndefinedProperty)) {
      property = NULL_PROPERTY;
  }

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     *
     * @return an array of Strings representing property names.
     */
    public String[] getPropertyNames(Long id) throws RemoteException {


  PropertySource ps = getPropertySource(id);
  return ps.getPropertyNames();


    }

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Related Classes of com.lightcrafts.mediax.jai.PropertySource

com.lightcrafts.media.jai.rmi.JAIRMIImageServer

com.lightcrafts.media.jai.rmi.RMIImageImpl

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