Class URLDescriptor

All Implemented Interfaces:
OperationDescriptor, RegistryElementDescriptor, Serializable

public class URLDescriptor
extends OperationDescriptorImpl

An OperationDescriptor describing the "URL" operation.

The URL operation creates an output image whose source is specified by a Uniform Resource Locator (URL).

The allowable formats are those registered with the class.

The second parameter contains an instance of ImageDecodeParam to be used during the decoding. It may be set to null in order to perform default decoding, or equivalently may be omitted.

The classes in the package are not a committed part of the JAI API. Future releases of JAI will make use of new classes in their place. This class will change accordingly.

Resource List
Name Value
GlobalName fileload
LocalName fileload
Description Reads an image from a file.
Version 1.0
arg0Desc The path of the file to read from.
arg1Desc The ImageDecodeParam to use.

Parameter List
Name Class Type Default Value
param null

See Also:
OperationDescriptor, Serialized Form

Fields inherited from class
resources, sourceNames, supportedModes
Fields inherited from interface
Constructor Summary
Method Summary
static RenderedOp create(URL URL, ImageDecodeParam param, RenderingHints hints)
          Reads an image from a URL.
Methods inherited from class
arePropertiesSupported, getDefaultSourceClass, getDestClass, getDestClass, getInvalidRegion, getName, getNumParameters, getNumSources, getParamClasses, getParamDefaults, getParamDefaultValue, getParameterListDescriptor, getParamMaxValue, getParamMinValue, getParamNames, getPropertyGenerators, getPropertyGenerators, getRenderableDestClass, getRenderableSourceClasses, getResourceBundle, getResources, getSourceClasses, getSourceClasses, getSourceNames, getSupportedModes, isImmediate, isModeSupported, isRenderableSupported, isRenderedSupported, makeDefaultSourceClassList, validateArguments, validateArguments, validateParameters, validateParameters, validateRenderableArguments, validateRenderableSources, validateSources, validateSources
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public URLDescriptor()
Method Detail


public static RenderedOp create(URL URL,
                                ImageDecodeParam param,
                                RenderingHints hints)
Reads an image from a URL.

Creates a ParameterBlockJAI from all supplied arguments except hints and invokes JAI.create(String,ParameterBlock,RenderingHints).

URL - The URL to read from.
param - The ImageDecodeParam to use. May be null.
hints - The RenderingHints to use. May be null.
The RenderedOp destination.
IllegalArgumentException - if URL is null.
See Also:
JAI, ParameterBlockJAI, RenderedOp