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Note that the one and only reference for the SNAP Python API is the SNAP Java API documentation. All Java classes from the API can be "imported" by the jpy Java-Python bridge which is implicitely used by esa_snappy. For example:
ProductIOPlugInManager = esa_snappy.jpy.get_type('org.esa.snap.framework.dataio.ProductIOPlugInManager')plugins = ProductIOPlugInManager.getInstance().getAllReaderPlugIns()However, the most frequently used Java API classes are already imported by default and do not require another explicit call of
get_type(..):Frequently used classes & interfaces from JRE
String = jpy.get_type('java.lang.String')File = jpy.get_type('java.io.File')Point = jpy.get_type('java.awt.Point')Rectangle = jpy.get_type('java.awt.Rectangle')Arrays = jpy.get_type('java.util.Arrays')Collections = jpy.get_type('java.util.Collections')List = jpy.get_type('java.util.List')Map = jpy.get_type('java.util.Map')Set = jpy.get_type('java.util.Set')ArrayList = jpy.get_type('java.util.ArrayList')HashMap = jpy.get_type('java.util.HashMap')HashSet = jpy.get_type('java.util.HashSet')
Frequently used classes & interfaces from SNAP Engine
Product tree & associates:
Product = jpy.get_type('org.esa.snap.core.datamodel.Product')VectorDataNode = jpy.get_type('org.esa.snap.core.datamodel.VectorDataNode')RasterDataNode = jpy.get_type('org.esa.snap.core.datamodel.RasterDataNode')TiePointGrid = jpy.get_type('org.esa.snap.core.datamodel.TiePointGrid')AbstractBand = jpy.get_type('org.esa.snap.core.datamodel.AbstractBand')Band = jpy.get_type('org.esa.snap.core.datamodel.Band')VirtualBand = jpy.get_type('org.esa.snap.core.datamodel.VirtualBand')Mask = jpy.get_type('org.esa.snap.core.datamodel.Mask')GeneralFilterBand = jpy.get_type('org.esa.snap.core.datamodel.GeneralFilterBand')ConvolutionFilterBand = jpy.get_type('org.esa.snap.core.datamodel.ConvolutionFilterBand')
Product tree associates:
ProductData = jpy.get_type('org.esa.snap.core.datamodel.ProductData')GeoCoding = jpy.get_type('org.esa.snap.core.datamodel.GeoCoding')TiePointGeoCoding = jpy.get_type('org.esa.snap.core.datamodel.TiePointGeoCoding')PixelGeoCoding = jpy.get_type('org.esa.snap.core.datamodel.PixelGeoCoding')PixelGeoCoding2 = jpy.get_type('org.esa.snap.core.datamodel.PixelGeoCoding2')CrsGeoCoding = jpy.get_type('org.esa.snap.core.datamodel.CrsGeoCoding')GeoPos = jpy.get_type('org.esa.snap.core.datamodel.GeoPos')PixelPos = jpy.get_type('org.esa.snap.core.datamodel.PixelPos')FlagCoding = jpy.get_type('org.esa.snap.core.datamodel.FlagCoding')ProductNodeGroup = jpy.get_type('org.esa.snap.core.datamodel.ProductNodeGroup')
Graph Processing Framework:
GPF = jpy.get_type('org.esa.snap.core.gpf.GPF')Operator = jpy.get_type('org.esa.snap.core.gpf.Operator')Tile = jpy.get_type('org.esa.snap.core.gpf.Tile')
Utilities:
EngineConfig = jpy.get_type('org.esa.snap.runtime.EngineConfig')Engine = jpy.get_type('org.esa.snap.runtime.Engine')SystemUtils = jpy.get_type('org.esa.snap.core.util.SystemUtils')ProductIO = jpy.get_type('org.esa.snap.core.dataio.ProductIO')ProductUtils = jpy.get_type('org.esa.snap.core.util.ProductUtils')GeoUtils = jpy.get_type('org.esa.snap.core.util.GeoUtils')ProgressMonitor = jpy.get_type('com.bc.ceres.core.ProgressMonitor')PlainFeatureFactory = jpy.get_type('org.esa.snap.core.datamodel.PlainFeatureFactory')FeatureUtils = jpy.get_type('org.esa.snap.core.util.FeatureUtils')
GeoTools:
DefaultGeographicCRS = jpy.get_type('org.geotools.referencing.crs.DefaultGeographicCRS')ListFeatureCollection = jpy.get_type('org.geotools.data.collection.ListFeatureCollection')SimpleFeatureBuilder = jpy.get_type('org.geotools.feature.simple.SimpleFeatureBuilder')
JTS:
Geometry = jpy.get_type('org.locationtech.jts.geom.Geometry')WKTReader = jpy.get_type('org.locationtech.jts.io.WKTReader')