Boot properties can have java.lang.Object as sequence type

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/metadata/types/TypeUtil.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016, 2023 Pivotal, Inc.
+ * Copyright (c) 2016, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -468,6 +468,10 @@ public boolean isIndexable(Type type) {
 	public boolean isSequencable(Type type) {
 		return isIndexable(type);
 	}
+
+	public boolean isObjectOrSequence(Type type) {
+		return OBJECT_TYPE_NAME.equals(type.getErasure());
+	}
 
 	private static boolean isArray(Type type) {
 		return type!=null && type.getErasure().endsWith("[]");

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/properties/reconcile/PropertyNavigator.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016-2017 Pivotal, Inc.
+ * Copyright (c) 2016, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -92,7 +92,7 @@ public Type navigate(int offset, Type type) {
 				} else if (navOp=='[') {
 					if (typeUtil.isBracketable(type)) {
 						return bracketNavigate(offset, type);
-					} else {
+					} else if (!typeUtil.isObjectOrSequence(type)) {
 						problemCollector.accept(problem(ApplicationPropertiesProblemType.PROP_INVALID_INDEXED_NAVIGATION,
 								"Can't use '[..]' navigation for property '"+textBetween(region.getStart(), offset)+"' of type "+type,
 								offset, region.getEnd()-offset));

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/yaml/reconcile/ApplicationYamlASTReconciler.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016, 2019 Pivotal, Inc.
+ * Copyright (c) 2016, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -341,6 +341,8 @@ private void reconcile(YamlFileAST root, SequenceNode seq, Type type) {
 					reconcile(root, element, domainType);
 				}
 			}
+		} else if (typeUtil.isObjectOrSequence(type)) {
+			// skip reconciling further as it can be anything - no schema
 		} else {
 			expectTypeFoundSequence(type, seq);
 		}

headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationPropertiesEditorTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016, 2024 Pivotal, Inc.
+ * Copyright (c) 2016, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -2309,6 +2309,30 @@ void testSetOfEnumsCompletions() throws Exception {
                 "my.color-set=red,BLUE<*>"
         );
     }
+
+    @Test
+    void sequenceOrObject() throws Exception {
+        data("my.any", "java.util.Map<java.lang.String,java.lang.Object>", null, "Some map");
+
+        Editor editor = newEditor(
+        		"""
+        		my.any.entry.value.name=Freddy
+        		my.any.entry.value.age=the-age
+        		my.any.entry.value.bad=123
+        		"""
+        );
+        editor.assertProblems();
+
+        editor = newEditor(
+        		"""
+        		my.any.entry[0].value.name=Freddy
+        		my.any.entry[0].value.age=the-age
+        		my.any.entry[0].value.bad=123
+        		"""
+        );
+        editor.assertProblems();
+    }
+
 
 	////////////// harness code below /////////////////////////
 

headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationYamlEditorTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016, 2024 Pivotal, Inc.
+ * Copyright (c) 2016, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -5060,6 +5060,35 @@ void test_NoQuickfixForDeprecatedProperty() throws Exception {
         editor.assertNoCodeAction(problem);
         assertEquals(DiagnosticSeverity.Error, problem.getSeverity());
     }
+
+    @Test
+    void sequenceOrObject() throws Exception {
+        IJavaProject p = createPredefinedMavenProject("map-of-pojo");
+        useProject(p);
+        data("my.any", "java.util.Map<java.lang.String,java.lang.Object>", null, "Some map");
+
+        Editor editor = newEditor(
+                "my:\n" +
+                        "  any:\n" +
+                		"    entry:\n" + 
+                        "      - value:\n" +
+                        "        name: Freddy\n" +
+                        "        age: the-age\n" +
+                        "        bad: 123"
+        );
+        editor.assertProblems();
+
+        editor = newEditor(
+                "my:\n" +
+                        "  any:\n" +
+                		"    entry:\n" + 
+                        "      value:\n" +
+                        "        name: Freddy\n" +
+                        "        age: the-age\n" +
+                        "        bad: 123"
+        );
+        editor.assertProblems();
+    }
 
 	///////////////// cruft ////////////////////////////////////////////////////////