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java.lang.Objectjavax.imageio.spi.IIOServiceProvider
javax.imageio.spi.ImageOutputStreamSpi
public abstract class ImageOutputStreamSpi
An abstract superclass for service providers that create image output streams for a file, URL, byte array or any other target.
Field Summary | |
---|---|
protected Class<?> |
outputClass
Indicates which kind of output is produced by the streams created by createOutputStreamInstance(Object) . |
Fields inherited from class javax.imageio.spi.IIOServiceProvider |
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vendorName, version |
Constructor Summary | |
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protected |
ImageOutputStreamSpi()
Constructs a service provider for image output streams, given no parameters. |
|
ImageOutputStreamSpi(String vendorName,
String version,
Class<?> outputClass)
Constructs a service provider for image output streams, given the vendor name, a version string and the kind of producable output. |
Method Summary | |
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boolean |
canUseCacheFile()
Determines whether ImageOutputStreams created
by this service provider benefit from using a cache file. |
ImageOutputStream |
createOutputStreamInstance(Object output)
|
abstract ImageOutputStream |
createOutputStreamInstance(Object output,
boolean useCache,
File cacheDir)
|
Class<?> |
getOutputClass()
Determines which kind of output is produced by the streams created by createOutputStreamInstance(Object) . |
boolean |
needsCacheFile()
Determines whether ImageOutputStreams created
by this service provider require the use of a cache file. |
Methods inherited from class javax.imageio.spi.IIOServiceProvider |
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getDescription, getVendorName, getVersion, onDeregistration, onRegistration |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected Class<?> outputClass
createOutputStreamInstance(Object)
.
Constructor Detail |
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protected ImageOutputStreamSpi()
IIOServiceProvider.vendorName
,
IIOServiceProvider.version
and outputClass
to non-null values.
public ImageOutputStreamSpi(String vendorName, String version, Class<?> outputClass)
IllegalArgumentException
- if vendorName
or version
is null
.Method Detail |
---|
public Class<?> getOutputClass()
createOutputStreamInstance(Object)
.
public boolean canUseCacheFile()
ImageOutputStreams
created
by this service provider benefit from using a cache file.
The default behavior is to return false
.
true
if the created streams are faster or
need less memory when a cache file is being used;
false
if no positive effect results from the cache
file.public boolean needsCacheFile()
ImageOutputStreams
created
by this service provider require the use of a cache file.
The default behavior is to return false
.
true
if the created streams can only work
when a cache file is being used; false
if no cache
file is needed.public abstract ImageOutputStream createOutputStreamInstance(Object output, boolean useCache, File cacheDir) throws IOException
IOException
public ImageOutputStream createOutputStreamInstance(Object output) throws IOException
IOException
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