| java.lang.Object
 javax.media.jai.OperationDescriptorImpl
javax.media.jai.operator.FileLoadDescriptor
| FileLoadDescriptor | | public class FileLoadDescriptor extends OperationDescriptorImpl (Code) | | An OperationDescriptor describing the "FileLoad" operation.
In the default instance the validateParameters() method
checks that the named file exists and is readable. If not, it will return
false, causing JAI.createNS() to throw an
IllegalArgumentException.
In special cases like when an image is loaded from a Remote system,
the above check for existence of a file on the local system could be bypassed.
This is done by setting the Boolean variable checkFileLocally to FALSE in the ParameterBlock
The allowable formats are those registered with the
com.sun.media.jai.codec.ImageCodec 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 com.sun.media.jai.codec
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 |
| Vendor | com.sun.media.jai |
| Description | Reads an image from a file. |
| DocURL | http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/FileLoadDescriptor.html |
| Version | 1.0 |
| arg0Desc | The path of the file to read from. |
| arg1Desc | The ImageDecodeParam to use. |
| arg2Desc | Boolean specifying if File existence should be checked locally. |
Parameter List
| Name | Class Type |
Default Value |
|---|
| filename | java.lang.String |
NO_PARAMETER_DEFAULT |
| param | com.sun.media.jai.codec.ImageDecodeParam |
null |
| checkFileLocally | java.lang.Boolean |
TRUE |
See Also: javax.media.jai.OperationDescriptor |
| FileLoadDescriptor | | public FileLoadDescriptor()(Code) | | Constructor.
|
| validateParameters | | protected boolean validateParameters(ParameterBlock args, StringBuffer msg)(Code) | | Validates the input parameters.
In addition to the standard checks performed by the
superclass method, this method by default checks that the source file
exists and is readable. This check may be bypassed by setting the
checkFileLocally parameter to FALSE
|
| Methods inherited from javax.media.jai.OperationDescriptorImpl | public boolean arePropertiesSupported()(Code)(Java Doc)
protected static Class getDefaultSourceClass(String modeName)(Code)(Java Doc)
public Class getDestClass(String modeName)(Code)(Java Doc)
public Class getDestClass()(Code)(Java Doc)
public Object getInvalidRegion(String modeName, ParameterBlock oldParamBlock, RenderingHints oldHints, ParameterBlock newParamBlock, RenderingHints newHints, OperationNode node)(Code)(Java Doc)
public String getName()(Code)(Java Doc)
public int getNumParameters()(Code)(Java Doc)
public int getNumSources()(Code)(Java Doc)
public Class[] getParamClasses()(Code)(Java Doc)
public Object getParamDefaultValue(int index)(Code)(Java Doc)
public Object[] getParamDefaults()(Code)(Java Doc)
public Number getParamMaxValue(int index)(Code)(Java Doc)
public Number getParamMinValue(int index)(Code)(Java Doc)
public String[] getParamNames()(Code)(Java Doc)
public ParameterListDescriptor getParameterListDescriptor(String modeName)(Code)(Java Doc)
public PropertyGenerator[] getPropertyGenerators(String modeName)(Code)(Java Doc)
public PropertyGenerator[] getPropertyGenerators()(Code)(Java Doc)
public Class getRenderableDestClass()(Code)(Java Doc)
public Class[] getRenderableSourceClasses()(Code)(Java Doc)
public ResourceBundle getResourceBundle(Locale locale)(Code)(Java Doc)
public String[][] getResources(Locale locale)(Code)(Java Doc)
public Class[] getSourceClasses(String modeName)(Code)(Java Doc)
public Class[] getSourceClasses()(Code)(Java Doc)
public String[] getSourceNames()(Code)(Java Doc)
public String[] getSupportedModes()(Code)(Java Doc)
public boolean isImmediate()(Code)(Java Doc)
public boolean isModeSupported(String modeName)(Code)(Java Doc)
public boolean isRenderableSupported()(Code)(Java Doc)
public boolean isRenderedSupported()(Code)(Java Doc)
protected static Class[][] makeDefaultSourceClassList(String[] supportedModes, int numSources)(Code)(Java Doc)
public boolean validateArguments(String modeName, ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
public boolean validateArguments(ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
protected boolean validateParameters(String modeName, ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
protected boolean validateParameters(ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
public boolean validateRenderableArguments(ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
protected boolean validateRenderableSources(ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
protected boolean validateSources(String modeName, ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
protected boolean validateSources(ParameterBlock args, StringBuffer msg)(Code)(Java Doc)
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