DATACMNS-1466 - Fixed potential ArrayIndexOutOfBoundsException in DefaultPersistentPropertyPath.

Introduced explicit content checks in ….getLeafProperty() and ….getBaseProperty().

src/main/java/org/springframework/data/mapping/context/DefaultPersistentPropertyPath.java

@@ -144,7 +144,7 @@ class DefaultPersistentPropertyPath<P extends PersistentProperty<P>> implements
 	 */
 	@Nullable
 	public P getLeafProperty() {
-		return properties.get(properties.size() - 1);
+		return properties.isEmpty() ? null : properties.get(properties.size() - 1);
 	}
 
 	/*
@@ -153,7 +153,7 @@ class DefaultPersistentPropertyPath<P extends PersistentProperty<P>> implements
 	 */
 	@Nullable
 	public P getBaseProperty() {
-		return properties.get(0);
+		return properties.isEmpty() ? null : properties.get(0);
 	}
 
 	/*

src/test/java/org/springframework/data/mapping/context/DefaultPersistentPropertyPathUnitTests.java

@@ -138,4 +138,20 @@ public class DefaultPersistentPropertyPathUnitTests<P extends PersistentProperty
 	public void skipsMappedPropertyNameIfConverterReturnsEmptyStrings() {
 		assertThat(twoLegs.toDotPath(source -> "")).isNull();
 	}
+
+	@Test // DATACMNS-1466
+	public void returnsNullForLeafPropertyOnEmptyPath() {
+
+		PersistentPropertyPath<P> path = new DefaultPersistentPropertyPath<P>(Collections.emptyList());
+
+		assertThat(path.getLeafProperty()).isNull();
+	}
+
+	@Test // DATACMNS-1466
+	public void returnsNullForBasePropertyOnEmptyPath() {
+
+		PersistentPropertyPath<P> path = new DefaultPersistentPropertyPath<P>(Collections.emptyList());
+
+		assertThat(path.getBaseProperty()).isNull();
+	}
 }