Revert "Improve allowNullValue handling when a null value is provided"

This reverts commit fd568f3e96.

spring-context-support/src/test/java/org/springframework/cache/caffeine/CaffeineCacheManagerTests.java

@@ -102,7 +102,14 @@ public class CaffeineCacheManagerTests {
 		assertEquals("value1", cache1x.get("key1").get());
 		cache1x.put("key2", 2);
 		assertEquals(2, cache1x.get("key2").get());
-		
+		try {
+			cache1x.put("key3", null);
+			fail("Should have thrown NullPointerException");
+		}
+		catch (NullPointerException ex) {
+			// expected
+		}
+
 		cm.setAllowNullValues(true);
 		Cache cache1y = cm.getCache("c1");
 

spring-context-support/src/test/java/org/springframework/cache/caffeine/CaffeineCacheTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@ import com.github.benmanes.caffeine.cache.Caffeine;
 import org.junit.Before;
 import org.junit.Test;
 
-import org.springframework.cache.AbstractValueAdaptingCacheTests;
+import org.springframework.cache.AbstractCacheTests;
 import org.springframework.cache.Cache;
 
 import static org.junit.Assert.*;
@@ -29,31 +29,21 @@ import static org.junit.Assert.*;
  * @author Ben Manes
  * @author Stephane Nicoll
  */
-public class CaffeineCacheTests extends AbstractValueAdaptingCacheTests<CaffeineCache> {
+public class CaffeineCacheTests extends AbstractCacheTests<CaffeineCache> {
 
 	private com.github.benmanes.caffeine.cache.Cache<Object, Object> nativeCache;
 
 	private CaffeineCache cache;
 
-	private CaffeineCache cacheNoNull;
-
 	@Before
 	public void setUp() {
 		nativeCache = Caffeine.newBuilder().build();
 		cache = new CaffeineCache(CACHE_NAME, nativeCache);
-		com.github.benmanes.caffeine.cache.Cache<Object, Object> nativeCacheNoNull
-				= Caffeine.newBuilder().build();
-		cacheNoNull =  new CaffeineCache(CACHE_NAME_NO_NULL, nativeCacheNoNull, false);
 	}
 
 	@Override
 	protected CaffeineCache getCache() {
-		return getCache(true);
-	}
-
-	@Override
-	protected CaffeineCache getCache(boolean allowNull) {
-		return allowNull ? this.cache : this.cacheNoNull;
+		return cache;
 	}
 
 	@Override

spring-context-support/src/test/java/org/springframework/cache/guava/GuavaCacheManagerTests.java

@@ -101,7 +101,14 @@ public class GuavaCacheManagerTests {
 		assertEquals("value1", cache1x.get("key1").get());
 		cache1x.put("key2", 2);
 		assertEquals(2, cache1x.get("key2").get());
-		
+		try {
+			cache1x.put("key3", null);
+			fail("Should have thrown NullPointerException");
+		}
+		catch (NullPointerException ex) {
+			// expected
+		}
+
 		cm.setAllowNullValues(true);
 		Cache cache1y = cm.getCache("c1");
 

spring-context-support/src/test/java/org/springframework/cache/jcache/JCacheEhCacheApiTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,12 +25,12 @@ import javax.cache.spi.CachingProvider;
 import org.junit.After;
 import org.junit.Before;
 
-import org.springframework.cache.AbstractValueAdaptingCacheTests;
+import org.springframework.cache.AbstractCacheTests;
 
 /**
  * @author Stephane Nicoll
  */
-public class JCacheEhCacheApiTests extends AbstractValueAdaptingCacheTests<JCacheCache> {
+public class JCacheEhCacheApiTests extends AbstractCacheTests<JCacheCache> {
 
 	private CacheManager cacheManager;
 
@@ -38,19 +38,13 @@ public class JCacheEhCacheApiTests extends AbstractValueAdaptingCacheTests<JCach
 
 	private JCacheCache cache;
 
-	private JCacheCache cacheNoNull;
-
 
 	@Before
 	public void setup() {
 		this.cacheManager = getCachingProvider().getCacheManager();
 		this.cacheManager.createCache(CACHE_NAME, new MutableConfiguration<>());
-		this.cacheManager.createCache(CACHE_NAME_NO_NULL, new MutableConfiguration<>());
 		this.nativeCache = this.cacheManager.getCache(CACHE_NAME);
 		this.cache = new JCacheCache(this.nativeCache);
-		Cache<Object, Object> nativeCacheNoNull =
-				this.cacheManager.getCache(CACHE_NAME_NO_NULL);
-		this.cacheNoNull = new JCacheCache(nativeCacheNoNull, false);
 	}
 
 	protected CachingProvider getCachingProvider() {
@@ -64,14 +58,10 @@ public class JCacheEhCacheApiTests extends AbstractValueAdaptingCacheTests<JCach
 		}
 	}
 
-	@Override
-	protected JCacheCache getCache() {
-		return getCache(true);
-	}
 
 	@Override
-	protected JCacheCache getCache(boolean allowNull) {
-		return allowNull ? this.cache : this.cacheNoNull;
+	protected JCacheCache getCache() {
+		return this.cache;
 	}
 
 	@Override