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Unnecessary null checks in MongoConverters [DATAMONGO-2385] #3243

spring-projects-issues opened this issue Oct 2, 2019 · 1 comment


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@spring-projects-issues spring-projects-issues commented Oct 2, 2019

M. Justin opened DATAMONGO-2385 and commented

Very, very minor thing, but I noticed that many of the converters in MongoConverters null check their inputs, returning null when the input value is null.

enum ObjectIdToStringConverter implements Converter<ObjectId, String> {

	public String convert(ObjectId id) {
		return id == null ? null : id.toString();

However, per the documentation of the implemented Converter interface, the input argument to the "convert" method will never be null:

source - the source object to convert, which must be an instance of S *(never null)*

Unless these converters are being used in an atypical way, these null checks therefore appear to be unnecessary

Referenced from: pull request #802

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