Limit searches for spring config files to resources folders

src/main/java/org/openrewrite/java/spring/ChangeSpringPropertyKey.java

@@ -71,7 +71,7 @@ public TreeVisitor<?, ExecutionContext> getVisitor() {
         org.openrewrite.properties.ChangePropertyKey subpropertiesChangePropertyKey =
                 new org.openrewrite.properties.ChangePropertyKey(Pattern.quote(oldPropertyKey + ".") + exceptRegex() + "(.+)", newPropertyKey + ".$1", true, true);
 
-        return new TreeVisitor<Tree, ExecutionContext>() {
+        return Preconditions.check(new IsPossibleSpringConfigFile(), new TreeVisitor<Tree, ExecutionContext>() {
             @Override
             public @Nullable Tree visit(@Nullable Tree tree, ExecutionContext ctx) {
                 if (tree instanceof Yaml.Documents) {
@@ -88,7 +88,7 @@ public TreeVisitor<?, ExecutionContext> getVisitor() {
                 }
                 return tree;
             }
-        };
+        });
     }
 
     private String exceptRegex() {

src/main/java/org/openrewrite/java/spring/CommentOutSpringPropertyKey.java

@@ -51,7 +51,7 @@ public String getDescription() {
     public TreeVisitor<?, ExecutionContext> getVisitor() {
         Recipe changeProperties = new org.openrewrite.properties.AddPropertyComment(propertyKey, comment, true);
         Recipe changeYaml = new org.openrewrite.yaml.CommentOutProperty(propertyKey, comment, true);
-        return new TreeVisitor<Tree, ExecutionContext>() {
+        return Preconditions.check(new IsPossibleSpringConfigFile(), new TreeVisitor<Tree, ExecutionContext>() {
             @Override
             public @Nullable Tree preVisit(@NonNull Tree tree, ExecutionContext ctx) {
                 stopAfterPreVisit();
@@ -62,6 +62,6 @@ public TreeVisitor<?, ExecutionContext> getVisitor() {
                 }
                 return tree;
             }
-        };
+        });
     }
 }

src/main/java/org/openrewrite/java/spring/IsPossibleSpringConfigFile.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2025 the original author or authors.
+ * <p>
+ * Licensed under the Moderne Source Available License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * https://docs.moderne.io/licensing/moderne-source-available-license
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.openrewrite.java.spring;
+
+import org.jspecify.annotations.Nullable;
+import org.openrewrite.ExecutionContext;
+import org.openrewrite.Tree;
+import org.openrewrite.TreeVisitor;
+import org.openrewrite.marker.SearchResult;
+import org.openrewrite.marker.SourceSet;
+import org.openrewrite.properties.tree.Properties;
+import org.openrewrite.yaml.tree.Yaml;
+
+/**
+ * A precondition to determine if a file might be a
+ * <a href="https://docs.spring.io/spring-boot/docs/2.1.7.RELEASE/reference/html/boot-features-external-config.html#boot-features-external-config-application-property-files">Spring configuration file</a>.
+ * This does not make positive identification of files which are spring configuration files, as there are few hard limits.
+ * Instead, this tries to rule out files which, due to their type or location, cannot be spring properties.
+ */
+public class IsPossibleSpringConfigFile extends TreeVisitor<Tree, ExecutionContext> {
+
+    @Override
+    @Nullable
+    public Tree visit(@Nullable Tree tree, ExecutionContext ctx) {
+        if (((tree instanceof Yaml.Documents) || (tree instanceof Properties.File)) && tree.getMarkers().findFirst(SourceSet.class).isPresent()) {
+            return SearchResult.found(tree);
+        }
+        return tree;
+    }
+}