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# This file is part of meas_base. 

# 

# Developed for the LSST Data Management System. 

# This product includes software developed by the LSST Project 

# (https://www.lsst.org). 

# See the COPYRIGHT file at the top-level directory of this distribution 

# for details of code ownership. 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the GNU General Public License 

# along with this program. If not, see <https://www.gnu.org/licenses/>. 

 

import numpy as np 

 

from .catalogCalculation import (CatalogCalculationPluginConfig, 

CatalogCalculationPlugin) 

from .pluginRegistry import register 

 

__all__ = ( 

"CatalogCalculationFootprintAreaConfig", 

"CatalogCalculationFootprintAreaPlugin", 

) 

 

 

class CatalogCalculationFootprintAreaConfig(CatalogCalculationPluginConfig): 

"""Configuration for footprint area catalog calculation plugin. 

""" 

 

pass 

 

 

@register("base_FootprintArea") 

class CatalogCalculationFootprintAreaPlugin(CatalogCalculationPlugin): 

"""Catalog calculation plugin to record the area of a source's footprint. 

""" 

 

ConfigClass = CatalogCalculationFootprintAreaConfig 

 

@classmethod 

def getExecutionOrder(cls): 

return cls.DEFAULT_CATALOGCALCULATION 

 

def __init__(self, config, name, schema, metadata): 

CatalogCalculationPlugin.__init__(self, config, name, schema, metadata) 

self.key = schema.addField( 

schema.join(name, "value"), 

type=np.int32, 

doc="Number of pixels in the source's detection footprint.", 

units="pixel" 

) 

 

def calculate(self, measRecord): 

measRecord.set(self.key, measRecord.getFootprint().getArea()) 

 

def fail(self, measRecord, error=None): 

# Should be impossible for this algorithm to fail unless there is no 

# Footprint (and that's a precondition for measurement). 

pass