public Class TIFFImageReaderSpi

Implements abstract javax.imageio.spi.ImageReaderSpi.canDecodeInput.

Doc from javax.imageio.spi.ImageReaderSpi.canDecodeInput.

Returns true if the supplied source object appears to be of the format supported by this reader. Returning true from this method does not guarantee that reading will succeed, only that there appears to be a reasonable chance of success based on a brief inspection of the stream contents. If the source is an ImageInputStream, implementations will commonly check the first several bytes of the stream for a "magic number" associated with the format. Once actual reading has commenced, the reader may still indicate failure at any time prior to the completion of decoding.

It is important that the state of the object not be disturbed in order that other ImageReaderSpis can properly determine whether they are able to decode the object. In particular, if the source is an ImageInputStream, a mark/reset pair should be used to preserve the stream position.

Formats such as "raw," which can potentially attempt to read nearly any stream, should return false in order to avoid being invoked in preference to a closer match.

If source is not an instance of one of the classes returned by getInputTypes, the method should simply return false.

Parameters

input:Object

the object (typically an ImageInputStream) to be decoded.

Returns:boolean

true if it is likely that this stream can be decoded.

Exceptions

IOException:

if an I/O error occurs while reading the stream.

Implements abstract javax.imageio.spi.ImageReaderSpi.createReaderInstance.

Doc from javax.imageio.spi.ImageReaderSpi.createReaderInstance.

Returns an instance of the ImageReader implementation associated with this service provider. The returned object will initially be in an initial state as if its reset method had been called.

An Object may be supplied to the plug-in at construction time. The nature of the object is entirely plug-in specific.

Typically, a plug-in will implement this method using code such as return new MyImageReader(this).

Parameters

extension:Object

a plug-in specific extension object, which may be null.

Returns:ImageReader

an ImageReader instance.

Implements abstract javax.imageio.spi.IIOServiceProvider.getDescription.

Doc from javax.imageio.spi.IIOServiceProvider.getDescription.

Returns a brief, human-readable description of this service provider and its associated implementation. The resulting string should be localized for the supplied Locale, if possible.

Parameters

locale:Locale

a Locale for which the return value should be localized.

Returns:String

a String containing a description of this service provider.

Overrides javax.imageio.spi.IIOServiceProvider.onRegistration.

Implements javax.imageio.spi.RegisterableService.onRegistration.

Doc from javax.imageio.spi.IIOServiceProvider.onRegistration.

A callback that will be called exactly once after the Spi class has been instantiated and registered in a ServiceRegistry. This may be used to verify that the environment is suitable for this service, for example that native libraries can be loaded. If the service cannot function in the environment where it finds itself, it should deregister itself from the registry.

Only the registry should call this method.

The default implementation does nothing.

Parameters

registry:ServiceRegistry

Doc from javax.imageio.spi.RegisterableService.onRegistration.

a ServiceRegistry where this object has been registered.

category:Class<?>

Doc from javax.imageio.spi.RegisterableService.onRegistration.

a Class object indicating the registry category under which this object has been registered.