mirror of
https://github.com/google/earthengine-api.git
synced 2025-12-08 19:26:12 +00:00
100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
#!/usr/bin/env python3
|
|
"""Base class for Image, Feature and Collection.
|
|
|
|
This class is never intended to be instantiated by the user.
|
|
"""
|
|
from typing import Any, Dict, Optional, Union
|
|
|
|
from ee import apifunction
|
|
from ee import computedobject
|
|
from ee import ee_exception
|
|
|
|
|
|
class Element(computedobject.ComputedObject):
|
|
"""Base class for ImageCollection and FeatureCollection."""
|
|
|
|
_initialized = False
|
|
|
|
# pylint: disable-next=useless-parent-delegation
|
|
def __init__(
|
|
self,
|
|
func: Optional[apifunction.ApiFunction],
|
|
args: Optional[Dict[str, Any]],
|
|
opt_varName: Optional[str] = None, # pylint: disable=g-bad-name
|
|
):
|
|
"""Constructs a collection by initializing its ComputedObject."""
|
|
super().__init__(func, args, opt_varName)
|
|
|
|
@classmethod
|
|
def initialize(cls) -> None:
|
|
"""Imports API functions to this class."""
|
|
if not cls._initialized:
|
|
apifunction.ApiFunction.importApi(cls, 'Element', 'Element')
|
|
cls._initialized = True
|
|
|
|
@classmethod
|
|
def reset(cls) -> None:
|
|
"""Removes imported API functions from this class."""
|
|
apifunction.ApiFunction.clearApi(cls)
|
|
cls._initialized = False
|
|
|
|
@staticmethod
|
|
def name() -> str:
|
|
return 'Element'
|
|
|
|
def set(
|
|
self,
|
|
*args: Union[Dict[str, Any], float, str, computedobject.ComputedObject],
|
|
) -> 'Element':
|
|
"""Overrides one or more metadata properties of an Element.
|
|
|
|
Args:
|
|
*args: Either a dictionary of properties, or a vararg sequence of
|
|
properties, e.g. key1, value1, key2, value2, ...
|
|
|
|
Returns:
|
|
The element with the specified properties overridden.
|
|
"""
|
|
if len(args) == 1:
|
|
properties = args[0]
|
|
|
|
# If this is a keyword call, unwrap it.
|
|
if (isinstance(properties, dict) and
|
|
(len(properties) == 1 and 'properties' in properties) and
|
|
isinstance(properties['properties'],
|
|
(dict, computedobject.ComputedObject))):
|
|
# Looks like a call with keyword parameters. Extract them.
|
|
properties = properties['properties']
|
|
|
|
if isinstance(properties, dict):
|
|
# Still a plain object. Extract its keys. Setting the keys separately
|
|
# allows filter propagation.
|
|
result = self
|
|
for key, value in properties.items():
|
|
result = apifunction.ApiFunction.call_(
|
|
'Element.set', result, key, value)
|
|
elif (isinstance(properties, computedobject.ComputedObject) and
|
|
apifunction.ApiFunction.lookupInternal('Element.setMulti')):
|
|
# A computed dictionary. Can't set each key separately.
|
|
result = apifunction.ApiFunction.call_(
|
|
'Element.setMulti', self, properties)
|
|
else:
|
|
raise ee_exception.EEException(
|
|
'When Element.set() is passed one argument, '
|
|
'it must be a dictionary.')
|
|
else:
|
|
# Interpret as key1, value1, key2, value2, ...
|
|
if len(args) % 2 != 0:
|
|
raise ee_exception.EEException(
|
|
'When Element.set() is passed multiple arguments, there '
|
|
'must be an even number of them.')
|
|
result = self
|
|
for i in range(0, len(args), 2):
|
|
key = args[i]
|
|
value = args[i + 1]
|
|
result = apifunction.ApiFunction.call_(
|
|
'Element.set', result, key, value)
|
|
|
|
# Manually cast the result to an image.
|
|
return self._cast(result)
|