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ObjectCoverageProcessor
public class CoverageProcessor
Base class for coverage processor implementations.
Field Summary | |
---|---|
protected Hints |
hints
The rendering hints for JAI operations (never null ). |
static Logger |
LOGGER
The logger for coverage processing operations. |
static Level |
OPERATION
The logging level for reporting coverage operations. |
protected FactoryRegistry |
registry
The service registry for finding Operation implementations. |
Constructor Summary | |
---|---|
CoverageProcessor()
Constructs a coverage processor. |
|
CoverageProcessor(RenderingHints hints)
Constructs a default coverage processor. |
Method Summary | |
---|---|
protected void |
addOperation(Operation operation)
Add the specified operation to this processor. |
Coverage |
doOperation(ParameterValueGroup parameters)
Applies a process operation to a coverage. |
Coverage |
doOperation(ParameterValueGroup parameters,
Hints hints)
Applies a process operation to a coverage. |
static CoverageProcessor |
getInstance()
Returns a default processor instance. |
static CoverageProcessor |
getInstance(Hints hints)
Returns a default processor instance. |
Locale |
getLocale()
The locale for logging message or reporting errors. |
Operation |
getOperation(String name)
Returns the operation for the specified name. |
Collection<Operation> |
getOperations()
Retrieves grid processing operations information. |
Object |
getRenderingHint(RenderingHints.Key key)
Returns a rendering hint. |
void |
listOperations(Writer out)
Lists a summary of all operations to the specified stream. |
static void |
main(String[] args)
Dumps to the standard output stream a list of operations for the default processor. |
void |
printOperations(Writer out,
String[] names)
Prints a description of operations to the specified stream. |
void |
scanForPlugins()
Scans for factory plug-ins on the application class path. |
Methods inherited from class Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final Logger LOGGER
public static final Level OPERATION
Level.INFO
.
protected final Hints hints
null
).
This field is usually given as argument to OperationJAI
methods.
protected final FactoryRegistry registry
Operation
implementations.
Constructor Detail |
---|
public CoverageProcessor()
public CoverageProcessor(RenderingHints hints)
scanForPlugins()
method will be
automatically invoked the first time an operation is required. Additional operations
can be added by subclasses with the addOperation(org.opengis.coverage.processing.Operation)
method. Rendering hints will
be initialized with the following hints:
JAI.KEY_REPLACE_INDEX_COLOR_MODEL
set to Boolean.FALSE
.JAI.KEY_TRANSFORM_ON_COLORMAP
set to Boolean.FALSE
.
hints
- A set of additional rendering hints, or null
if none.Method Detail |
---|
public static CoverageProcessor getInstance()
Note: this is a temporary method, until we have GeoAPI interface for coverage processor and a factory finder for their implementations.
public static CoverageProcessor getInstance(Hints hints)
Note: this is a temporary method, until we have GeoAPI interface for coverage processor and a factory finder for their implementations.
public Locale getLocale()
public void listOperations(Writer out) throws IOException
out
- The destination stream.
IOException
- if an error occured will writing to the stream.public void printOperations(Writer out, String[] names) throws OperationNotFoundException, IOException
names
array
is non-null, then only the specified operations are printed. Otherwise, all operations
are printed. The description details include operation names and lists of parameters.
out
- The destination stream.names
- The operation to print, or an empty array for none, or null
for all.
IOException
- if an error occured will writing to the stream.
OperationNotFoundException
- if an operation named in names
was not found.protected void addOperation(Operation operation) throws IllegalStateException
operation
- The operation to add.
IllegalStateException
- if an operation already exists with the same name.public Collection<Operation> getOperations()
public Operation getOperation(String name) throws OperationNotFoundException
name
- Name of the operation (case insensitive).
OperationNotFoundException
- if there is no operation for the specified name.public final Object getRenderingHint(RenderingHints.Key key)
key
- The hint key (e.g. Hints.JAI_INSTANCE
).
null
if there is no hint for the
specified key.public Coverage doOperation(ParameterValueGroup parameters, Hints hints)
AbstractOperation.doOperation(org.opengis.parameter.ParameterValueGroup, org.geotools.factory.Hints)
.
If all source coverages used the same interpolation, then this interpolation is applied
to the resulting coverage (except if the resulting coverage has already an interpolation).
parameters
- Parameters required for the operation. The easiest way to construct them
is to invoke operation.getParameters
()
and to modify the returned group.
OperationNotFoundException
- if there is no operation for the parameter group name.public Coverage doOperation(ParameterValueGroup parameters) throws OperationNotFoundException
AbstractOperation.doOperation(org.opengis.parameter.ParameterValueGroup, org.geotools.factory.Hints)
.
If all source coverages used the same interpolation, then this interpolation is applied
to the resulting coverage (except if the resulting coverage has already an interpolation).
parameters
- Parameters required for the operation. The easiest way to construct them
is to invoke operation.getParameters
()
and to modify the returned group.
OperationNotFoundException
- if there is no operation for the parameter group name.public void scanForPlugins()
public static void main(String[] args)
Note for Windows users: If the output contains strange symbols, try to supply an "java org.geotools.coverage.processing.DefaultProcessor Interpolate
-encoding
" argument. Example:
The codepage number (850 in the previous example) can be fetch from the DOS command line by entering the "java org.geotools.coverage.processing.DefaultProcessor -encoding Cp850
chcp
" command with no arguments.
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