Cache.get(key, type) doesn't work in case of null value found in cache [SPR-11567]

[spring-projects-issues]

Jan Novotný opened SPR-11567 and commented

There is probably unwanted behaviour coded in class org.springframework.cache.ehcache.EhCacheCache in method org.springframework.cache.ehcache.EhCacheCache#get(java.lang.Object, java.lang.Class<T>). When there is no value cached (ie. value == null) there is no way this check could pass:

if (type != null && !type.isInstance(value)) {
throw new IllegalStateException("Cached value is not of required type [" + type.getName() + "]: " + value);
}

And this leads to unexpected Illegal state exceptions in expected situations when caches are empty.

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Affects: 4.0.2

Issue Links:

• #15688 Add org.springframework.cache.Cache.get(key, type)

[spring-projects-issues]

Juergen Hoeller commented

This is indeed an accident, and applies not only to EhCacheCache but to all our implementations of the Cache interface... Fixed for 4.0.3 now.

Juergen