Fix false Sonar null check warnings

- impossible null, but not detectable by Sonar

spring-rabbit/src/main/java/org/springframework/amqp/rabbit/connection/CachingConnectionFactory.java

@@ -330,7 +330,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		Assert.isTrue(sessionCacheSize >= 1, "Channel cache size must be 1 or higher");
 		this.channelCacheSize = sessionCacheSize;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setChannelCacheSize(sessionCacheSize);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setChannelCacheSize(sessionCacheSize); // NOSONAR
 		}
 	}
 
@@ -347,7 +347,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		Assert.notNull(cacheMode, "'cacheMode' must not be null.");
 		this.cacheMode = cacheMode;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setCacheMode(cacheMode);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setCacheMode(cacheMode); // NOSONAR
 		}
 	}
 
@@ -359,7 +359,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		Assert.isTrue(connectionCacheSize >= 1, "Connection cache size must be 1 or higher.");
 		this.connectionCacheSize = connectionCacheSize;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setConnectionCacheSize(connectionCacheSize);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setConnectionCacheSize(connectionCacheSize); // NOSONAR
 		}
 	}
 
@@ -375,7 +375,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		Assert.isTrue(connectionLimit >= 1, "Connection limit must be 1 or higher.");
 		this.connectionLimit = connectionLimit;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setConnectionLimit(connectionLimit);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setConnectionLimit(connectionLimit); // NOSONAR
 		}
 	}
 
@@ -392,7 +392,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 	public void setPublisherReturns(boolean publisherReturns) {
 		this.publisherReturns = publisherReturns;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setPublisherReturns(publisherReturns);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setPublisherReturns(publisherReturns); // NOSONAR
 		}
 	}
 
@@ -449,7 +449,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		Assert.notNull(confirmType, "'confirmType' cannot be null");
 		this.confirmType = confirmType;
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).setPublisherConfirmType(confirmType);
+			((CachingConnectionFactory) getPublisherConnectionFactory()).setPublisherConfirmType(confirmType); // NOSONAR
 		}
 	}
 
@@ -469,7 +469,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		this.channelCheckoutTimeout = channelCheckoutTimeout;
 		if (this.defaultPublisherFactory) {
 			((CachingConnectionFactory) getPublisherConnectionFactory())
-					.setChannelCheckoutTimeout(channelCheckoutTimeout);
+					.setChannelCheckoutTimeout(channelCheckoutTimeout); // NOSONAR
 		}
 	}
 
@@ -492,7 +492,7 @@ public class CachingConnectionFactory extends AbstractConnectionFactory
 		}
 		initCacheWaterMarks();
 		if (this.defaultPublisherFactory) {
-			((CachingConnectionFactory) getPublisherConnectionFactory()).afterPropertiesSet();
+			((CachingConnectionFactory) getPublisherConnectionFactory()).afterPropertiesSet(); // NOSONAR
 		}
 	}
 

spring-rabbit/src/main/java/org/springframework/amqp/rabbit/connection/PooledChannelConnectionFactory.java

@@ -101,7 +101,7 @@ public class PooledChannelConnectionFactory extends AbstractConnectionFactory im
 		Assert.notNull(poolConfigurer, "'poolConfigurer' cannot be null");
 		this.poolConfigurer = poolConfigurer; // NOSONAR - sync inconsistency
 		if (this.defaultPublisherFactory) {
-			((PooledChannelConnectionFactory) getPublisherConnectionFactory()).setPoolConfigurer(poolConfigurer);
+			((PooledChannelConnectionFactory) getPublisherConnectionFactory()).setPoolConfigurer(poolConfigurer); // NOSONAR
 		}
 	}
 
@@ -117,8 +117,8 @@ public class PooledChannelConnectionFactory extends AbstractConnectionFactory im
 	public void setSimplePublisherConfirms(boolean simplePublisherConfirms) {
 		this.simplePublisherConfirms = simplePublisherConfirms;
 		if (this.defaultPublisherFactory) {
-			((ThreadChannelConnectionFactory) getPublisherConnectionFactory())
-				.setSimplePublisherConfirms(simplePublisherConfirms);
+			((PooledChannelConnectionFactory) getPublisherConnectionFactory())
+				.setSimplePublisherConfirms(simplePublisherConfirms); // NOSONAR
 		}
 	}
 

spring-rabbit/src/main/java/org/springframework/amqp/rabbit/connection/ThreadChannelConnectionFactory.java

@@ -92,7 +92,7 @@ public class ThreadChannelConnectionFactory extends AbstractConnectionFactory im
 		this.simplePublisherConfirms = simplePublisherConfirms;
 		if (this.defaultPublisherFactory) {
 			((ThreadChannelConnectionFactory) getPublisherConnectionFactory())
-				.setSimplePublisherConfirms(simplePublisherConfirms);
+				.setSimplePublisherConfirms(simplePublisherConfirms); // NOSONAR
 		}
 	}