Solution #1004
Solution #1004
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Great job on your pull request! 🌟 Your annotations are well-defined, and the classes use dependency injection effectively. The parsing logic and service implementations are on point. Just a few suggestions to improve code quality and error handling have been provided, but they don't significantly impact the functionality of your code. Keep up the good work, and consider these tips for future enhancements! 👍
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| throw new RuntimeException("Injection failed" | ||
| + ", missing @Component annotation on the class " + clazz.getName()); |
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Instead of catching a general RuntimeException, it's better to use a more specific exception. Also, consider including the cause of the exception in the thrown exception to provide a stack trace for easier debugging.
| if (field.isAnnotationPresent(Inject.class)) { | ||
| Object fieldInstance = getInstance(field.getType()); | ||
| clazzImplementationInstance = createNewInstance(clazz); | ||
| try { |
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The instance creation createNewInstance(clazz) should be checked before the fields injection loop to avoid unnecessary instance creation if any field injection fails. Move this line before the loop starts.
| instances.put(clazz, instance); | ||
| return instance; | ||
| } catch (ReflectiveOperationException e) { | ||
| throw new RuntimeException("Can`t create a new instance of " + clazz.getName(), e); |
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When throwing an exception, it's better to use a more specific exception rather than a general RuntimeException. Also, include the cause of the exception in the thrown exception to provide a stack trace for easier debugging.
| } | ||
| } | ||
| } | ||
| if (clazzImplementationInstance == null) { |
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You're creating an instance of 'clazz' before checking if it's null. This can lead to NullPointerException if 'clazz' is null.
| public class Injector { | ||
| private static final Injector injector = new Injector(); | ||
| private static final Map<Class<?>, Class<?>> interfaceImplementations = Map.of( |
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The current implementation of 'interfaceImplementations' map does not support multiple implementations of a single interface. Consider using a different data structure or strategy to support this.
| throw new IllegalArgumentException("Injection failed" | ||
| + ", missing @Component annotation on the class " + clazz.getName()); | ||
| } | ||
| Object clazzImplementationInstance = createNewInstance(clazz);; |
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There is a redundant semicolon at the end of the line.
| } | ||
| } | ||
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| private Class<?> findImplementation(Class<?> interfaceOrClazz) { |
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'findImplementation' method currently only supports interfaces. It will not return correct implementation if a class is passed as an argument.
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