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Java Inheritance: empty method in parent class
The Next CEO of Stack OverflowIs Java “pass-by-reference” or “pass-by-value”?Prefer composition over inheritance?Java inner class and static nested classHow do I read / convert an InputStream into a String in Java?When to use LinkedList over ArrayList in Java?How do I generate random integers within a specific range in Java?Understanding Python super() with __init__() methodsPython class inherits objectHow do I convert a String to an int in Java?Creating a memory leak with Java
I was wondering if it is frowned upon to have an empty function in a parent class for child classes to override if they needed it? I personally think the use case below justifies it -
class Foo
void performAdditionalChecksIfNeeded(String decrypted)
void validate(String encrypted)
final String decrypted = decryptIfProperlyEncrypted(encrypted);
performAdditionalChecksIfNeeded(decrypted);
class Bar extends Foo
@override
void performAdditionalChecksIfNeeded(String decrypted)
// Additional validation logic
I'm aware that Bar class could've simply overridden validate() and called super.validate() to eliminate the need of the empty function in Foo. The reason why I had the code arranged this way is that decryptIfProperlyEncrypted uses a library that I wanted to keep only in the Foo class due to separation of concern, performance concerns (decryption), and code duplication avoidance. In other words, if performAdditionalChecksIfNeeded didn't exist in Foo I'd have to perform the decryption again in Bar.
java inheritance polymorphism
asked Mar 8 at 19:22
ddolceddolce
338418
add a comment |
I was wondering if it is frowned upon to have an empty function in a parent class for child classes to override if they needed it? I personally think the use case below justifies it -
class Foo
void performAdditionalChecksIfNeeded(String decrypted)
void validate(String encrypted)
final String decrypted = decryptIfProperlyEncrypted(encrypted);
performAdditionalChecksIfNeeded(decrypted);
class Bar extends Foo
@override
void performAdditionalChecksIfNeeded(String decrypted)
// Additional validation logic
I'm aware that Bar class could've simply overridden validate() and called super.validate() to eliminate the need of the empty function in Foo. The reason why I had the code arranged this way is that decryptIfProperlyEncrypted uses a library that I wanted to keep only in the Foo class due to separation of concern, performance concerns (decryption), and code duplication avoidance. In other words, if performAdditionalChecksIfNeeded didn't exist in Foo I'd have to perform the decryption again in Bar.
java inheritance polymorphism
asked Mar 8 at 19:22
ddolceddolce
338418
1
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26
add a comment |
I was wondering if it is frowned upon to have an empty function in a parent class for child classes to override if they needed it? I personally think the use case below justifies it -
class Foo
void performAdditionalChecksIfNeeded(String decrypted)
void validate(String encrypted)
final String decrypted = decryptIfProperlyEncrypted(encrypted);
performAdditionalChecksIfNeeded(decrypted);
class Bar extends Foo
@override
void performAdditionalChecksIfNeeded(String decrypted)
// Additional validation logic
I'm aware that Bar class could've simply overridden validate() and called super.validate() to eliminate the need of the empty function in Foo. The reason why I had the code arranged this way is that decryptIfProperlyEncrypted uses a library that I wanted to keep only in the Foo class due to separation of concern, performance concerns (decryption), and code duplication avoidance. In other words, if performAdditionalChecksIfNeeded didn't exist in Foo I'd have to perform the decryption again in Bar.
java inheritance polymorphism
asked Mar 8 at 19:22
ddolceddolce
338418
I was wondering if it is frowned upon to have an empty function in a parent class for child classes to override if they needed it? I personally think the use case below justifies it -
class Foo
void performAdditionalChecksIfNeeded(String decrypted)
void validate(String encrypted)
final String decrypted = decryptIfProperlyEncrypted(encrypted);
performAdditionalChecksIfNeeded(decrypted);
class Bar extends Foo
@override
void performAdditionalChecksIfNeeded(String decrypted)
// Additional validation logic
I'm aware that Bar class could've simply overridden validate() and called super.validate() to eliminate the need of the empty function in Foo. The reason why I had the code arranged this way is that decryptIfProperlyEncrypted uses a library that I wanted to keep only in the Foo class due to separation of concern, performance concerns (decryption), and code duplication avoidance. In other words, if performAdditionalChecksIfNeeded didn't exist in Foo I'd have to perform the decryption again in Bar.
java inheritance polymorphism
java inheritance polymorphism
asked Mar 8 at 19:22
ddolceddolce
338418
asked Mar 8 at 19:22
ddolceddolce
338418
asked Mar 8 at 19:22
ddolceddolce
338418
asked Mar 8 at 19:22
ddolceddolce
338418
asked Mar 8 at 19:22
ddolceddolce
338418
338418
1
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26
add a comment |
1
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26
1
1
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26
add a comment |
1 Answer
1
active
oldest
votes
Why not use composition over inheritance in this case? The only thing Foo class seems to be doing is the decryption. I would use it in Bar class as a dependency.
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Why not use composition over inheritance in this case? The only thing Foo class seems to be doing is the decryption. I would use it in Bar class as a dependency.
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
add a comment |
Why not use composition over inheritance in this case? The only thing Foo class seems to be doing is the decryption. I would use it in Bar class as a dependency.
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
add a comment |
Why not use composition over inheritance in this case? The only thing Foo class seems to be doing is the decryption. I would use it in Bar class as a dependency.
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
Why not use composition over inheritance in this case? The only thing Foo class seems to be doing is the decryption. I would use it in Bar class as a dependency.
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
answered Mar 8 at 19:30
Diego MarinDiego Marin
146111
146111
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
add a comment |
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
The decryption method throws an exception if the encrypted string made no sense, in some of our use cases that is the only validation needed (to see if something is properly encrypted)
– ddolce
Mar 8 at 20:11
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
I don't see it as a validation, it is a decryption operation that can go wrong if the data isn't valid. This operation could be encapsulated inside a class and used where it is necessary.
– Diego Marin
Mar 8 at 20:18
add a comment |
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1
I don't see why it should be a problem. There are more functional alternatives, but an empty overridable method is a reasonable approach to some problems.
– khelwood
Mar 8 at 19:26