org.geotools.renderer.lite.gridcoverage2d

Class BaseCoverageProcessingNode

Object

BaseCoverageProcessingNode

All Implemented Interfaces:

CoverageProcessingNode

Direct Known Subclasses:

ZeroImageNode

public abstract class BaseCoverageProcessingNode
extends Object
implements CoverageProcessingNode

Base implementation of a CoverageProcessingNode .

This implementation provides convenient methods for managing sinks and source for a CoverageProcessingNode . The getOutput() is used to get the output of this CoverageProcessingNode (a CoverageProcessingException is thrown in case something bad happens while processing

Implementors must implement the abstract method execute() which is guaranteed to run in a critical section where the sources and sinks for this CoverageProcessingNode will not be touched.

Author:

Simone Giannecchini, GeoSolutions.

Constructor Summary

Constructors

Constructor and Description
BaseCoverageProcessingNode(InternationalString name, InternationalString description) Default constructor
BaseCoverageProcessingNode(int maxSources, Hints hints, InternationalString name, InternationalString description) Default constructor that gives users the possibility
BaseCoverageProcessingNode(int maxSources, InternationalString name, InternationalString description) Default constructor that gives users the possibility

Method Summary

Modifier and Type	Method and Description
void	addSink(CoverageProcessingNode sink) Adds a sink CoverageProcessingNode to the list of sinks for this CoverageProcessingNode.
boolean	addSource(CoverageProcessingNode source) Adds a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.
void	dispose(boolean force) Disposes this CoverageProcessingNode along with all the resources it might have allocated The result for this CoverageProcessingNode is also disposed.
protected static void	ensureNotNull(Object source, String name) Checks whether the provided object is null or not.
protected static void	ensureSourceNotNull(Object source, String name) Checks whether the provided source object is null or not.
protected abstract GridCoverage	execute() Subclasses MUST override this method in order to do the actual processing.
GridCoverageFactory	getCoverageFactory() The GridCoverageFactory we will internally use for build intermediate and output GridCoverage2D .
InternationalString	getDescription() Retrieves the description for this CoverageProcessingNode
Hints	getHints() Getter for Hints .
int	getMaximumNumberOfSources() retrieves the maximum number of sources we are allowed to set for this CoverageProcessingNode
InternationalString	getName() Retrieves the name for this CoverageProcessingNode
int	getNumberOfSinks() Returns the number of sinks for this CoverageProcessingNode.
int	getNumberOfSources() Returns the number of sources for this CoverageProcessingNode.
GridCoverage2D	getOutput() This method is responsible for triggering the execution of this CoverageProcessingNode and also of all its sources.
CoverageProcessingNode	getSink(int index) Retrieves the sink located at index index in the List of sinks for this CoverageProcessingNode.
List<CoverageProcessingNode>	getSinks() Retrieves the List of sinks for this CoverageProcessingNode.
CoverageProcessingNode	getSource(int index) Retrieves the source located at index index in the List of sources for this CoverageProcessingNode.
List<CoverageProcessingNode>	getSources() Retrieves the List of source for this CoverageProcessingNode.
boolean	isDisposed() Tells me whether or not the node has been already disposed.
boolean	isExecuted() Tells me whether or not the node has been already executed.
boolean	removeSink(CoverageProcessingNode sink) Removes a sink CoverageProcessingNode from the list of sinks for this CoverageProcessingNode.
CoverageProcessingNode	removeSink(int index) Removes a sink CoverageProcessingNode from the list of sinks for this CoverageProcessingNode.
boolean	removeSource(CoverageProcessingNode source) Removes a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.
CoverageProcessingNode	removeSource(int index) Removes a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.
String	toString() Provides a descriptive description for this CoverageProcessingNode.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

BaseCoverageProcessingNode

public BaseCoverageProcessingNode(InternationalString name,
                                  InternationalString description)

Default constructor

BaseCoverageProcessingNode

public BaseCoverageProcessingNode(int maxSources,
                                  InternationalString name,
                                  InternationalString description)

Default constructor that gives users the possibility

Parameters:

maxSources - maximum number of sources allowed for this node.

BaseCoverageProcessingNode

public BaseCoverageProcessingNode(int maxSources,
                                  Hints hints,
                                  InternationalString name,
                                  InternationalString description)

Default constructor that gives users the possibility

Parameters:

maxSources - maximum number of sources allowed for this node.

hints - instance of Hints class to control creation of internal factories. It can be null.

Method Detail

execute

protected abstract GridCoverage execute()

Subclasses MUST override this method in order to do the actual processing.

Note that this method is invoked through this framework hence it is run within a critical section. Be careful with what you do within this method since it is essentially an "alien" method running within a synch section, hence all sort of bad things can happen.

Returns:

a GridCoverage2D which is the result of the processing.

dispose

public void dispose(boolean force)

Disposes this CoverageProcessingNode along with all the resources it might have allocated

The result for this CoverageProcessingNode is also disposed.

Specified by:

dispose in interface CoverageProcessingNode

Parameters:

force - force the disposition of this node.

getOutput

public GridCoverage2D getOutput()
                         throws CoverageProcessingException

This method is responsible for triggering the execution of this CoverageProcessingNode and also of all its sources.

In case something bad happens a CoverageProcessingException is thrown.

Specified by:

getOutput in interface CoverageProcessingNode

Returns:

the Coverage which represents the output for this CoverageProcessingNode.

Throws:

CoverageProcessingException

UML property:

name="output"

addSink

public void addSink(CoverageProcessingNode sink)

Description copied from interface: CoverageProcessingNode

Adds a sink CoverageProcessingNode to the list of sinks for this CoverageProcessingNode.

Specified by:

addSink in interface CoverageProcessingNode

Parameters:

sink - the CoverageProcessingNode to add to the List of sinks for this CoverageProcessingNode.

addSource

public boolean addSource(CoverageProcessingNode source)

Description copied from interface: CoverageProcessingNode

Adds a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.

Specified by:

addSource in interface CoverageProcessingNode

Parameters:

source - the CoverageProcessingNode to add to the List of sources for this CoverageProcessingNode.

Returns:

true if everything goes fine, false otherwise.

getSink

public CoverageProcessingNode getSink(int index)

Description copied from interface: CoverageProcessingNode

Retrieves the sink located at index index in the List of sinks for this CoverageProcessingNode.

Specified by:

getSink in interface CoverageProcessingNode

Parameters:

index - is the zero-based index for the source we want to access.

Returns:

the CoverageProcessingNode which represents the source at index index for this CoverageProcessingNode.

getSinks

public List<CoverageProcessingNode> getSinks()

Description copied from interface: CoverageProcessingNode

Retrieves the List of sinks for this CoverageProcessingNode. Each sink MUST be a CoverageProcessingNode.

Specified by:

getSinks in interface CoverageProcessingNode

Returns:

a List of CoverageProcessingNode which represents the sinks for this CoverageProcessingNode.

UML property:

name="sinks"

getSource

public CoverageProcessingNode getSource(int index)

Description copied from interface: CoverageProcessingNode

Retrieves the source located at index index in the List of sources for this CoverageProcessingNode.

Specified by:

getSource in interface CoverageProcessingNode

Parameters:

index - is the zero-based index for the sink we want to get.

Returns:

the CoverageProcessingNode which represents the sink at index index for this CoverageProcessingNode.

getSources

public List<CoverageProcessingNode> getSources()

Description copied from interface: CoverageProcessingNode

Retrieves the List of source for this CoverageProcessingNode. Each source MUST be a CoverageProcessingNode.

Specified by:

getSources in interface CoverageProcessingNode

Returns:

a List of CoverageProcessingNode which represents the sources for this CoverageProcessingNode.

UML property:

name="sources"

removeSink

public boolean removeSink(CoverageProcessingNode sink)

Description copied from interface: CoverageProcessingNode

Removes a sink CoverageProcessingNode from the list of sinks for this CoverageProcessingNode.

Specified by:

removeSink in interface CoverageProcessingNode

Parameters:

sink - the CoverageProcessingNode to remove from the List of sinks for this CoverageProcessingNode.

Returns:

true in case we remove something, false otherwise.

removeSink

public CoverageProcessingNode removeSink(int index)

Description copied from interface: CoverageProcessingNode

Removes a sink CoverageProcessingNode from the list of sinks for this CoverageProcessingNode.

Specified by:

removeSink in interface CoverageProcessingNode

Parameters:

index - the index at which we want to remove a sink from the List of sinks for this CoverageProcessingNode.

Returns:

the CoverageProcessingNode we actually remove from the sinks list.

removeSource

public boolean removeSource(CoverageProcessingNode source)

Description copied from interface: CoverageProcessingNode

Removes a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.

Specified by:

removeSource in interface CoverageProcessingNode

Parameters:

source - the CoverageProcessingNode to remove from the List of sources for this CoverageProcessingNode.

Returns:

true in case we remove something, false otherwise.

getHints

public Hints getHints()

Getter for Hints .

Specified by:

getHints in interface CoverageProcessingNode

Returns:

Hints provided at construction time to control GridCoverageFactory creation.

UML property:

name="hints"

getMaximumNumberOfSources

public int getMaximumNumberOfSources()

retrieves the maximum number of sources we are allowed to set for this CoverageProcessingNode

Returns:

the maximum number of sources we are allowed to set for this CoverageProcessingNode

UML property:

name="maximumNumberOfSources"

getCoverageFactory

public GridCoverageFactory getCoverageFactory()

The GridCoverageFactory we will internally use for build intermediate and output GridCoverage2D .

Specified by:

getCoverageFactory in interface CoverageProcessingNode

Returns:

a GridCoverageFactory we will internally use for build intermediate and output GridCoverage2D .

UML property:

name="coverageFactory"

getNumberOfSinks

public int getNumberOfSinks()

Description copied from interface: CoverageProcessingNode

Returns the number of sinks for this CoverageProcessingNode.

Specified by:

getNumberOfSinks in interface CoverageProcessingNode

Returns:

the number of sinks for this CoverageProcessingNode.

getNumberOfSources

public int getNumberOfSources()

Description copied from interface: CoverageProcessingNode

Returns the number of sources for this CoverageProcessingNode.

Specified by:

getNumberOfSources in interface CoverageProcessingNode

Returns:

the number of sources for this CoverageProcessingNode.

getDescription

public InternationalString getDescription()

Description copied from interface: CoverageProcessingNode

Retrieves the description for this CoverageProcessingNode

Specified by:

getDescription in interface CoverageProcessingNode

Returns:

the description for this CoverageProcessingNode

UML property:

name="description"

getName

public InternationalString getName()

Description copied from interface: CoverageProcessingNode

Retrieves the name for this CoverageProcessingNode

Specified by:

getName in interface CoverageProcessingNode

Returns:

the name for this CoverageProcessingNode

UML property:

name="name"

ensureSourceNotNull

protected static void ensureSourceNotNull(Object source,
                                          String name)

Checks whether the provided source object is null or not. If it is null it throws an IllegalArgumentException exception.

Parameters:

source - the object to check.

name - the operation we are trying to run.

ensureNotNull

protected static void ensureNotNull(Object source,
                                    String name)

Checks whether the provided object is null or not. If it is null it throws an IllegalArgumentException exception.

Parameters:

source - the object to check.

name - the operation we are trying to run.

removeSource

public CoverageProcessingNode removeSource(int index)
                                    throws IndexOutOfBoundsException

Description copied from interface: CoverageProcessingNode

Removes a source CoverageProcessingNode to the list of sources for this CoverageProcessingNode.

Specified by:

removeSource in interface CoverageProcessingNode

Parameters:

index - the index at which we want to remove a source from the List of sources for this CoverageProcessingNode.

Returns:

the CoverageProcessingNode we actually remove from the sources list.

Throws:

IndexOutOfBoundsException

toString

public String toString()

Description copied from interface: CoverageProcessingNode

Provides a descriptive description for this CoverageProcessingNode.

Specified by:

toString in interface CoverageProcessingNode

Overrides:

toString in class Object

Returns:

a descriptive description for this CoverageProcessingNode

isDisposed

public boolean isDisposed()

Tells me whether or not the node has been already disposed.

Returns:

true if the node has been already disposed, false otherwise.

UML property:

name="disposed"

isExecuted

public boolean isExecuted()

Tells me whether or not the node has been already executed.

Returns:

true if the node has been already executed, false otherwise.

UML property:

name="executed"