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  1. [B! postgresql] PostgreSQL 18からNOT NULL制約をNOT V...

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    行ごとに異なる値の非NULLなカラムを追加したいというケースもあります。このような場合「一度NULLを許可してカラムを追...アニメとゲーム テクノロジー PostgreSQL 18からNOT NULL制約をNOT VALIDで追加できるようになりました -...
    b.hatena.ne.jp/entry/s/www.m3tech.blog/entry/2026/03/13/110000
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    Tue Mar 17 13:12:07 UTC 2026
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  2. Assert (Spring Framework 7.0.2 API)

    object is null . Assert.isNull(value, "The value must be null"); Parameters:...the object is not null isNull @Contract ("!null, _ -> fail") public...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/Assert.html
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    Fri Feb 01 00:00:00 UTC 1980
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  3. ObjectUtils (Spring Framework 7.0.5 API)

    @Contract ("null, null -> true; null, _ -> false; _, null -> false")...true if both are null or false if only one is null . static int nullSafeHash...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/ObjectUtils.html
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    Fri Feb 01 00:00:00 UTC 1980
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  4. StringUtils (Spring Framework 7.0.5 API)

    quote @Contract ("null -> null; !null -> !null") public static...@Contract ("null -> null; !null -> !null") public static @Nullable...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/StringUtils.html
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    Fri Feb 01 00:00:00 UTC 1980
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  5. CollectionUtils (Spring Framework 7.0.2 API)

    or null if not found findValueOfType @Contract ("null, _ ->...firstElement @Contract ("null -> null") public static <T> @Nullable...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/CollectionUtils...
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    Fri Feb 01 00:00:00 UTC 1980
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  6. ClassUtils (Spring Framework 7.0.6 API)

    overrideThreadContex @Contract ("null -> null") public static @Nullable...resolvePrimitiveClas @Contract ("null -> null") public static @Nullable...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/ClassUtils.html
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    Fri Feb 01 00:00:00 UTC 1980
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  7. ReflectionUtils (Spring Framework 7.0.5 API)

    or null if not found findField @Contract ("_, null, null -> fail")...superclasses up to Object . Returns null if no Method can be found. Parameters:...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/ReflectionUtils...
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    Fri Feb 01 00:00:00 UTC 1980
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  8. RestTemplate (Spring Framework 7.0.6 API)

    or null if not set. io.micrometer.o...configured ClientRequestObserva , or null if not set. Since: 6.1 getForObject...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/client/RestTempl...
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    Fri Feb 01 00:00:00 UTC 1980
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  9. AbstractApplicationContext (Spring Framework 7....

    will never be null but possibly a stub for null returned from...will never be null . In case of a stub for null from a factory...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/support/Abst...
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    Fri Feb 01 00:00:00 UTC 1980
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  10. ConcurrentReferenceHashMap (Spring Framework 7....

    with the exception that null values and null keys are supported.... for the specified key , or null if not found. protected final...
    docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/ConcurrentRefer...
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    Fri Feb 01 00:00:00 UTC 1980
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