refactor!: Move FileIOUtils to more appropriate package (#22937)

Author: Artur-

flow-lit-template/src/main/java/com/vaadin/flow/component/littemplate/internal/LitTemplateParserImpl.java

@@ -38,11 +38,11 @@
 import com.vaadin.flow.di.Lookup;
 import com.vaadin.flow.di.ResourceProvider;
 import com.vaadin.flow.internal.AnnotationReader;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.Pair;
 import com.vaadin.flow.server.Constants;
 import com.vaadin.flow.server.DependencyFilter;
 import com.vaadin.flow.server.VaadinService;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendUtils;
 import com.vaadin.flow.shared.ui.Dependency;
 import com.vaadin.flow.shared.ui.LoadMode;

flow-plugins/flow-plugin-base/src/main/java/com/vaadin/flow/plugin/base/BuildFrontendUtil.java

@@ -46,11 +46,11 @@
 import tools.jackson.databind.node.ObjectNode;
 
 import com.vaadin.flow.di.Lookup;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.JacksonUtils;
 import com.vaadin.flow.server.Constants;
 import com.vaadin.flow.server.InitParameters;
 import com.vaadin.flow.server.frontend.ExecutionFailedException;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendTools;
 import com.vaadin.flow.server.frontend.FrontendToolsSettings;
 import com.vaadin.flow.server.frontend.FrontendUtils;

flow-plugins/flow-plugin-base/src/test/java/com/vaadin/flow/plugin/base/BuildFrontendUtilTest.java

@@ -52,13 +52,13 @@
 
 import com.vaadin.experimental.FeatureFlags;
 import com.vaadin.flow.di.Lookup;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.JacksonUtils;
 import com.vaadin.flow.server.Constants;
 import com.vaadin.flow.server.InitParameters;
 import com.vaadin.flow.server.PwaConfiguration;
 import com.vaadin.flow.server.frontend.EndpointGeneratorTaskFactory;
 import com.vaadin.flow.server.frontend.ExecutionFailedException;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendTools;
 import com.vaadin.flow.server.frontend.FrontendUtils;
 import com.vaadin.flow.server.frontend.TaskGenerateEndpoint;

flow-polymer-template/src/main/java/com/vaadin/flow/component/polymertemplate/NpmTemplateParser.java

@@ -28,11 +28,11 @@
 import com.vaadin.flow.di.Lookup;
 import com.vaadin.flow.di.ResourceProvider;
 import com.vaadin.flow.internal.AnnotationReader;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.Pair;
 import com.vaadin.flow.server.Constants;
 import com.vaadin.flow.server.DependencyFilter;
 import com.vaadin.flow.server.VaadinService;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendUtils;
 import com.vaadin.flow.shared.ui.Dependency;
 import com.vaadin.flow.shared.ui.LoadMode;

…in/flow/server/frontend/FileIOUtils.java …om/vaadin/flow/internal/FileIOUtils.javaflow-server/src/main/java/com/vaadin/flow/server/frontend/FileIOUtils.java renamed to flow-server/src/main/java/com/vaadin/flow/internal/FileIOUtils.java flow-server/src/main/java/com/vaadin/flow/server/frontend/FileIOUtils.java renamed to flow-server/src/main/java/com/vaadin/flow/internal/FileIOUtils.java

@@ -13,7 +13,7 @@
  * License for the specific language governing permissions and limitations under
  * the License.
  */
-package com.vaadin.flow.server.frontend;
+package com.vaadin.flow.internal;
 
 import java.io.File;
 import java.io.FileFilter;
@@ -40,8 +40,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.vaadin.flow.internal.StringUtil;
-
 /**
  * Utility class for file I/O operations, including conditional file writing,
  * file searching, and content comparison.
@@ -50,6 +48,10 @@
  */
 public class FileIOUtils {
 
+    private FileIOUtils() {
+        // Utils only
+    }
+
     /**
      * Deletes file if it exists and eats exceptions.
      *
@@ -59,7 +61,7 @@ public class FileIOUtils {
      *            to be deleted
      * @return true if succeeded
      */
-    static boolean deleteFileQuietly(File file) {
+    public static boolean deleteFileQuietly(File file) {
         if (file == null) {
             return false;
         }
@@ -80,7 +82,7 @@ static boolean deleteFileQuietly(File file) {
      * @return string from the content
      * @throws IOException
      */
-    static String urlToString(URL url) throws IOException {
+    public static String urlToString(URL url) throws IOException {
         try (InputStream input = url.openStream()) {
             return StringUtil.toUTF8String(input);
         }
@@ -184,7 +186,7 @@ public FileVisitResult postVisitDirectory(Path dir,
      *
      * @return the user's home directory
      */
-    static File getUserDirectory() {
+    public static File getUserDirectory() {
         return new File(System.getProperty("user.home"));
     }
 
@@ -202,7 +204,7 @@ static File getUserDirectory() {
      * @throws IOException
      *             if an I/O error occurs
      */
-    static List<File> listFiles(File directory, String[] extensions,
+    public static List<File> listFiles(File directory, String[] extensions,
             boolean recursive) throws IOException {
         List<File> result = new ArrayList<>();
         if (!directory.isDirectory()) {
@@ -243,7 +245,7 @@ static List<File> listFiles(File directory, String[] extensions,
      * @throws IOException
      *             if an I/O error occurs
      */
-    static boolean contentEquals(InputStream input1, InputStream input2)
+    public static boolean contentEquals(InputStream input1, InputStream input2)
             throws IOException {
         return Arrays.equals(input1.readAllBytes(), input2.readAllBytes());
     }
@@ -254,7 +256,7 @@ static boolean contentEquals(InputStream input1, InputStream input2)
      * @param closeable
      *            the resource to close
      */
-    static void closeQuietly(AutoCloseable closeable) {
+    public static void closeQuietly(AutoCloseable closeable) {
         if (closeable != null) {
             try {
                 closeable.close();
@@ -311,7 +313,7 @@ public static boolean wildcardMatch(String text, String pattern) {
      * @throws IOException
      *             if an I/O error occurs
      */
-    static boolean isEmptyDirectory(Path directory) throws IOException {
+    public static boolean isEmptyDirectory(Path directory) throws IOException {
         if (!Files.isDirectory(directory)) {
             return false;
         }
@@ -320,10 +322,6 @@ static boolean isEmptyDirectory(Path directory) throws IOException {
         }
     }
 
-    private FileIOUtils() {
-        // Utils only
-    }
-
     /**
      * Writes the given content into the given file unless the file already
      * contains that content.

flow-server/src/main/java/com/vaadin/flow/server/AbstractConfiguration.java

@@ -20,8 +20,8 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.server.frontend.BundleUtils;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendUtils;
 
 import static com.vaadin.flow.server.InitParameters.SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION;

flow-server/src/main/java/com/vaadin/flow/server/communication/IndexHtmlRequestHandler.java

@@ -49,6 +49,7 @@
 import com.vaadin.flow.internal.BrowserLiveReload;
 import com.vaadin.flow.internal.BrowserLiveReload.Backend;
 import com.vaadin.flow.internal.BrowserLiveReloadAccessor;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.JacksonUtils;
 import com.vaadin.flow.internal.LocaleUtil;
 import com.vaadin.flow.internal.UsageStatisticsExporter;
@@ -65,7 +66,6 @@
 import com.vaadin.flow.server.VaadinService;
 import com.vaadin.flow.server.VaadinServletContext;
 import com.vaadin.flow.server.VaadinSession;
-import com.vaadin.flow.server.frontend.FileIOUtils;
 import com.vaadin.flow.server.frontend.FrontendUtils;
 import com.vaadin.flow.server.frontend.ThemeUtils;
 import com.vaadin.flow.server.startup.ApplicationConfiguration;

flow-server/src/main/java/com/vaadin/flow/server/frontend/BundleUtils.java

@@ -34,6 +34,7 @@
 import tools.jackson.databind.node.ObjectNode;
 
 import com.vaadin.flow.component.Component;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.JacksonUtils;
 import com.vaadin.flow.internal.StringUtil;
 import com.vaadin.flow.server.Constants;

flow-server/src/main/java/com/vaadin/flow/server/frontend/BundleValidationUtil.java

@@ -42,6 +42,7 @@
 import com.vaadin.flow.component.Component;
 import com.vaadin.flow.component.WebComponentExporter;
 import com.vaadin.flow.component.WebComponentExporterFactory;
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.internal.JacksonUtils;
 import com.vaadin.flow.internal.StringUtil;
 import com.vaadin.flow.internal.UsageStatistics;

flow-server/src/main/java/com/vaadin/flow/server/frontend/DevBundleUtils.java

@@ -22,6 +22,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.vaadin.flow.internal.FileIOUtils;
 import com.vaadin.flow.server.Constants;
 
 /**