org.esa.snap.core.gpf.common

Class MergeOp

java.lang.Object

org.esa.snap.core.gpf.Operator

org.esa.snap.core.gpf.common.MergeOp

@OperatorMetadata(alias="Merge",
                  category="Raster",
                  description="Allows merging of several source products by using specified \'master\' as reference product.",
                  authors="SNAP Team",
                  version="1.2",
                  copyright="(c) 2012 by Brockmann Consult")
public class MergeOp
extends Operator

The merge operator allows copying raster data from other products to a specified product. The first product provided is considered the 'master product', into which the raster data coming from the other products is copied. Existing nodes are kept.

It is mandatory that the products share the same scene, that is, their width and height need to match with those of the master product as well as their geographic position.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MergeOp.NodeDescriptor
static class	MergeOp.Spi

Constructor Summary

Constructors

Constructor and Description
MergeOp()

Method Summary

Modifier and Type	Method and Description
void	computeTile(Band band, Tile targetTile, ProgressMonitor pm) Called by the framework in order to compute a tile for the given target band.
void	initialize() Initializes this operator and sets the one and only target product.

Methods inherited from class org.esa.snap.core.gpf.Operator

canComputeTile, canComputeTileStack, checkForCancellation, computeTileStack, deactivateComputeTileMethod, dispose, doExecute, ensureSceneGeoCoding, ensureSingleRasterSize, ensureSingleRasterSize, execute, finalize, getId, getLogger, getParameter, getParameter, getProductManager, getSourceProduct, getSourceProduct, getSourceProductId, getSourceProducts, getSourceTile, getSourceTile, getSpi, getTargetProduct, getTargetProperty, setLogger, setParameter, setParameterDefaultValues, setRequiresAllBands, setSourceProduct, setSourceProduct, setSourceProducts, setSpi, setTargetProduct, stopTileComputationObservation, update

Methods inherited from class java.lang.Object

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

Constructor Detail

MergeOp

public MergeOp()

Method Detail

initialize

public void initialize()
                throws OperatorException

Description copied from class: Operator

Initializes this operator and sets the one and only target product.

The target product can be either defined by a field of type Product annotated with the TargetProduct annotation or by calling Operator.setTargetProduct(org.esa.snap.core.datamodel.Product) method.

This method shall never be called directly. The framework calls this method after it has created an instance of this Operator. This will occur only once durting the lifetime of an Operator instance. If not already done, calling the Operator.getTargetProduct() will always trigger a call to the initialize() method. Any client code that must be performed before computation of tile data should be placed here.

Specified by:

initialize in class Operator

Throws:

OperatorException - If an error occurs during operator initialisation.

See Also:

Operator.getTargetProduct()

computeTile

public void computeTile(Band band,
                        Tile targetTile,
                        ProgressMonitor pm)
                 throws OperatorException

Description copied from class: Operator

Called by the framework in order to compute a tile for the given target band.

The default implementation throws a runtime exception with the message "not implemented".

This method shall never be called directly.

Overrides:

computeTile in class Operator

Parameters:

band - The target band.

targetTile - The current tile associated with the target band to be computed.

pm - A progress monitor which should be used to determine computation cancellation requests.

Throws:

OperatorException - If an error occurs during computation of the target raster.