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Java Source Code / Java Documentation » GIS » deegree » org.deegree.model.coverage.grid

Source Cross Reference Class Diagram Java Document (Java Doc)

org.deegree.model.coverage.grid .GridCoverageReader

All known Subclasses:   org.deegree.model.coverage.grid .AbstractGridCoverageReader,
GridCoverageReader
public interface GridCoverageReader (Code)
Support for reading grid coverages out of a persisten store. Instance of GridCoverageReader are obtained through a call to GridCoverageExchange.getReader(Object) . Grid coverages are usually read from the input stream in a sequential order.
author:
   OpenGIS® consortium
version:
   2.0
See Also:   GridCoverageExchange.getReader(Object)
See Also:   javax.imageio.ImageReader

Method Summary
void dispose()
     Allows any resources held by this object to be released.
String getCurrentSubname()

Format getFormat()

String[] getMetadataNames()
     Returns the list of metadata keywords associated with the as a whole (not associated with any particular grid coverage).
String getMetadataValue(String name)
     Retrieve the metadata value for a given metadata name.
Parameters:
  name - Metadata keyword for which to retrieve metadata.
Object getSource()
     the input source.
String[] listSubNames()
     Retrieve the list of grid coverages contained within the .
GridCoverage read(GeneralParameterValueIm[] parameters)
     Read the grid coverage from the current stream position, and move to the next grid coverage.
Parameters:
  parameters - An optional set of parameters.
void setCurrentSubname(String name)

Parameters:
  name - for the next grid coverage to within the.
void setMetadataValue(String name, String value)
     Sets the metadata value for a given metadata name.

Method Detail
dispose
void dispose() throws IOException(Code)
Allows any resources held by this object to be released. The result of calling any other method subsequent to a call to this method is undefined. It is important for applications to call this method when they know they will no longer be using this GridCoverageReader. Otherwise, the reader may continue to hold on to resources indefinitely.
throws:
  IOException - if an error occured while disposing resources (for example while closing a file).

getCurrentSubname
String getCurrentSubname() throws IOException(Code)
the name for the next grid coverage to be from the.
throws:
  IOException - if an error occurs during reading.

getFormat
Format getFormat()(Code)
the format handled by this GridCoverageReader.

getMetadataNames
String[] getMetadataNames() throws IOException(Code)
Returns the list of metadata keywords associated with the as a whole (not associated with any particular grid coverage). If no metadata is available, the array will be empty. The list of metadata keywords for the input source.
throws:
  IOException - if an error occurs during reading.

getMetadataValue
String getMetadataValue(String name) throws IOException, MetadataNameNotFoundException(Code)
Retrieve the metadata value for a given metadata name.
Parameters:
  name - Metadata keyword for which to retrieve metadata. The metadata value for the given metadata name. Should be one of the name returned byGridCoverageReader.getMetadataNames.
throws:
  IOException - if an error occurs during reading.
throws:
  MetadataNameNotFoundException - if there is no value for the specified metadata name.

getSource
Object getSource()(Code)
the input source. This is the object passed to theGridCoverageExchange.getReader(Object) method. It can be ajava.lang.String, an java.io.InputStream, ajava.nio.channels.FileChannel, whatever.

listSubNames
String[] listSubNames() throws IOException(Code)
Retrieve the list of grid coverages contained within the . Each grid can have a different coordinate system, number of dimensions and grid geometry. For example, a HDF-EOS file (GRID.HDF) contains 6 grid coverages each having a different projection. An empty array will be returned if no sub names exist. The list of grid coverages contained within the input source.
throws:
  IOException - if an error occurs during reading.

read
GridCoverage read(GeneralParameterValueIm[] parameters) throws InvalidParameterNameException, InvalidParameterValueException, ParameterNotFoundException, IOException(Code)
Read the grid coverage from the current stream position, and move to the next grid coverage.
Parameters:
  parameters - An optional set of parameters. Should be any or all of the parameters returned byFormat.getReadParameters. A new from the input source.
throws:
  InvalidParameterNameException - if a parameter in parameters doesn't have a recognized name.
throws:
  InvalidParameterValueException - if a parameter in parameters doesn't have a valid value.
throws:
  ParameterNotFoundException - if a parameter was required for the operation but was not provided in theparameters list.
throws:
  CannotCreateGridCoverageException - if the coverage can't be created for a logical reason (for example an unsupportedformat, or an inconsistency found in the data).
throws:
  IOException - if a read operation failed for some other input/output reason, includingjava.io.FileNotFoundException if no file with the given namecan be found, or javax.imageio.IIOException if an error was thrown by theunderlying image library.

setCurrentSubname
void setCurrentSubname(String name) throws IOException(Code)

Parameters:
  name - for the next grid coverage to within the. The subname can been fetch later at readingtime.
throws:
  IOException - if an error occurs during writing.

setMetadataValue
void setMetadataValue(String name, String value) throws IOException, MetadataNameNotFoundException(Code)
Sets the metadata value for a given metadata name.
Parameters:
  name - Metadata keyword for which to set the metadata.
Parameters:
  value - The metadata value for the given metadata name.
throws:
  IOException - if an error occurs during writing.
throws:
  MetadataNameNotFoundException - if the specified metadata name is not handled for this format.

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