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Pull Request — master (#226)
by Steve
02:52
created

TemporaryInjectionContext.__init__()   A

↳ Parent: lagom.injection_context

Complexity

Conditions 4

Size

Total Lines 15
Code Lines 12

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 6
CRAP Score 4

Importance

Changes 0
Metric Value
cc 4
eloc 12
nop 3
dl 0
loc 15
ccs 6
cts 6
cp 1
crap 4
rs 9.8
c 0
b 0
f 0
1 1 
from typing import Optional, Callable
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from .interfaces import ReadableContainer, ExtendableContainer

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class TemporaryInjectionContext:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    Context Manager wrapper around a container which applies the supplied function on

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    __enter__

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    _base_container: ExtendableContainer

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    _update_function: Optional[Callable[[ReadableContainer], ReadableContainer]] = None

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    def __init__(

            


            
                                                                        
                            
            
                                    
            
            

                
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        self,

            


            
                                                                        
                            
            
                                    
            
            

                
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        container: ExtendableContainer,

            


            
                                                                        
                            
            
                                    
            
            

                
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        update_function: Optional[

            


            
                                                                        
                            
            
                                    
            
            

                
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            Callable[[ReadableContainer], ReadableContainer]

            


            
                                                                        
                            
            
                                    
            
            

                
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        ] = None,

            


            
                                                                        
                            
            
                                    
            
            

                
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    ):

            


            
                                                                        
                            
            
                                    
            
            

                
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        self._base_container = container

            


            
                                                                        
                            
            
                                    
            
            

                
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        self._update_function = update_function

            


            
                                                                        
                            
            
                                    
            
            

                
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        if self._update_function:

            


            
                                                                        
                            
            
                                    
            
            

                
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            self._build_temporary_container = lambda: self._update_function(

            


            
                                                                        
                            
            
                                    
            
            

                
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                self._base_container

            


            
                                                                        
                            
            
                                    
            
            

                
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            )

            


            
                                                                        
                            
            
                                    
            
            

                
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        else:

            


            
                                                                        
                            
            
                                    
            
            

                
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            self._build_temporary_container = lambda: self._base_container.clone()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __enter__(self) -> ReadableContainer:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return self._build_temporary_container()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __exit__(self, exc_type, exc_val, exc_tb):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        pass

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def rebind(self, new_container):

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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        return TemporaryInjectionContext(new_container, self._update_function)

            


            
                                                        
            
                                    
            
            

                
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