feat: create utility init a new File #90

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- FileIO.newFile() create utility init a new File <https://github.com/fugerit-org/fj-lib/issues/90>
+
 ## [8.6.7] - 2025-05-09
 
 ### Added

fj-core/src/main/java/org/fugerit/java/core/io/FileIO.java

@@ -28,6 +28,40 @@
 @Slf4j
 public class FileIO {
 
+    /**
+     * Creates a new File from a base dir and file name.
+     *
+     * If the baseDir is null, only file name is used.
+     *
+     * @param baseDir   the parent folder
+     * @param fileName  the file name
+     * @return  the File
+     */
+    public static File newFile( String baseDir, String fileName ) {
+        return baseDir == null ?  new File( fileName ) :new File( baseDir, fileName );
+    }
+
+    /**
+     * Creates a new File from a base dir and file name.
+     *
+     * If the baseDir is null, only file name is used.
+     *
+     * Optionally mustAlreadyExists flag can be set.
+     *
+     * @param baseDir   the parent folder
+     * @param fileName  the file name
+     * @param mustAlreadyExists true if final file existence should be checked (if the path does not exist a IOException is thrown)
+     * @return  the File
+     * @throws IOException  in case of issues
+     */
+    public static File newFile( String baseDir, String fileName, boolean mustAlreadyExists ) throws IOException {
+        File file =  newFile( baseDir, fileName );
+        if ( mustAlreadyExists && !file.exists() ) {
+            throw new IOException( String.format( "File [%s] does not exist", file.getCanonicalPath() ) );
+        }
+        return file;
+    }
+
     public static boolean isInTmpFolder( File tempFile ) throws IOException {
         return isInTmpFolder( tempFile.getCanonicalPath() );
     }
@@ -38,18 +72,16 @@ public static boolean isInTmpFolder( String tempFilePath ) throws IOException {
     }
 
 	public static boolean createFullFile( File file ) throws IOException {
-		boolean created = true;
 		if ( file.exists() ) {
-			created = false;
+			return Boolean.FALSE;
 		} else {
 			if ( file.isDirectory() ) {
-				created = file.mkdirs();
+				return file.mkdirs();
 			} else {
 				file.getParentFile().mkdirs();
-				created = file.createNewFile();
+				return file.createNewFile();
 			}
 		}
-		return created;
 	}
 
     /*

fj-core/src/test/java/test/org/fugerit/java/core/io/TestFileIO.java

@@ -20,4 +20,38 @@ public void testIsInTmpFolderKo() throws IOException  {
         Assert.assertFalse(FileIO.isInTmpFolder( new File( "/" ) ));
     }
 
+    @Test
+    public void testNewFile() throws IOException {
+        String baseDir = "target/";
+        String fileName = "not-exists.txt";
+        String fileNameExists = "classes";
+        File file = FileIO.newFile( baseDir, fileName );
+        Assert.assertTrue( file.getPath().endsWith( fileName ) );
+        Assert.assertTrue( FileIO.newFile( null, fileName ).getPath().endsWith( fileName ) );
+        Assert.assertThrows( IOException.class, () -> FileIO.newFile( baseDir, fileName, Boolean.TRUE ) );
+        Assert.assertTrue( FileIO.newFile( baseDir, fileName, Boolean.FALSE ).getPath().endsWith( fileName ) );
+        Assert.assertTrue( FileIO.newFile( baseDir, fileNameExists, Boolean.TRUE ).getPath().endsWith( fileNameExists ) );
+    }
+
+
+    @Test
+    public void testCreateFullFile() throws IOException {
+        String baseDir0 = "target/";
+        String baseDir1 = "target/path/";
+        String fileName = "not-exists-alt.txt";
+        String fileNameExists = "classes";
+        File file0 = FileIO.newFile( baseDir0, fileName );
+        File file1 = FileIO.newFile( baseDir1, fileName );
+        File file2 = FileIO.newFile( baseDir0, fileNameExists );
+        file0.delete();
+        file1.delete();
+        file1.getParentFile().delete();
+        file2.delete();
+        Assert.assertTrue( FileIO.createFullFile( file0 ) );
+        Assert.assertTrue( FileIO.createFullFile( file1 ) );
+        Assert.assertFalse( FileIO.createFullFile( file0 ) );
+        Assert.assertFalse( FileIO.createFullFile( file2 ) );
+        Assert.assertFalse( FileIO.createFullFile( new File( baseDir1 ) ) );
+    }
+
 }