HHH-18122 added check of the arg type into equals()

hibernate-core/src/main/java/org/hibernate/internal/util/collections/BoundedConcurrentHashMap.java

@@ -225,6 +225,9 @@ public class BoundedConcurrentHashMap<K, V> extends AbstractMap<K, V>
 
 		@Override
 		public boolean equals(Object o) {
+			if (!(o instanceof HashEntry)) {
+				return false;
+			}
 			// HashEntry is internal class, never leaks out of CHM, hence slight optimization
 			if ( this == o ) {
 				return true;
@@ -484,6 +487,9 @@ public class BoundedConcurrentHashMap<K, V> extends AbstractMap<K, V>
 
 		@Override
 		public boolean equals(Object o) {
+			if (!(o instanceof LIRSHashEntry)) {
+				return false;
+			}
 			// HashEntry is internal class, never leaks out of CHM, hence slight optimization
 			if ( this == o ) {
 				return true;

hibernate-core/src/main/java/org/hibernate/mapping/Table.java

@@ -840,6 +840,9 @@ public class Table implements Serializable, ContributableDatabaseObject {
 		}
 
 		public boolean equals(Object other) {
+			if (!(other instanceof ForeignKeyKey)) {
+				return false;
+			}
 			ForeignKeyKey fkk = (ForeignKeyKey) other;
 			return fkk != null
 				&& Arrays.equals( fkk.columns, columns )

hibernate-core/src/main/java/org/hibernate/spi/NavigablePath.java

@@ -126,6 +126,10 @@ public class NavigablePath implements DotIdentifierSequence, Serializable {
 
 	@Override
 	public boolean equals(@Nullable Object other) {
+		if (!(other instanceof NavigablePath)) {
+			return false;
+		}
+
 		if ( this == other ) {
 			return true;
 		}

hibernate-core/src/main/java/org/hibernate/type/spi/TypeConfiguration.java

@@ -642,6 +642,9 @@ public class TypeConfiguration implements SessionFactoryObserver, Serializable {
 
 		@Override
 		public boolean equals(Object o) {
+			if (!(o instanceof ArrayCacheKey)) {
+				return false;
+			}
 			return Arrays.equals( components, ((ArrayCacheKey) o).components );
 		}