Remove deprecated getFiles() instead of getResolvedArtifacts()

See gh-43191

Author: wickdynex

buildSrc/src/main/java/org/springframework/boot/build/bom/CheckBom.java

@@ -32,6 +32,7 @@
 import org.gradle.api.DefaultTask;
 import org.gradle.api.GradleException;
 import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.artifacts.ResolvedArtifact;
 import org.gradle.api.artifacts.dsl.DependencyHandler;
 import org.gradle.api.tasks.TaskAction;
 
@@ -46,6 +47,7 @@
  * Checks the validity of a bom.
  *
  * @author Andy Wilkinson
+ * @author Wick Dynex
  */
 public abstract class CheckBom extends DefaultTask {
 
@@ -209,14 +211,17 @@ private void checkDependencyManagementAlignment(Library library, List<String> er
 
 	private File resolveBom(Library library, String alignsWithBom) {
 		String coordinates = alignsWithBom + ":" + library.getVersion().getVersion() + "@pom";
-		Set<File> files = this.configurations.detachedConfiguration(this.dependencies.create(coordinates))
-			.getResolvedConfiguration()
-			.getFiles();
-		if (files.size() != 1) {
+
+		Set<ResolvedArtifact> artifacts = this.configurations
+				.detachedConfiguration(this.dependencies.create(coordinates))
+				.getResolvedConfiguration()
+				.getResolvedArtifacts();
+
+		if (artifacts.size() != 1) {
 			throw new IllegalStateException(
-					"Expected a single file but '" + coordinates + "' resolved to " + files.size());
+					"Expected a single file but '" + coordinates + "' resolved to " + artifacts.size());
 		}
-		return files.iterator().next();
-	}
 
+		return artifacts.iterator().next().getFile();
+	}
 }