8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/nio/file/SimpleFileVisitor.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.nio.file;
+
+import java.nio.file.attribute.BasicFileAttributes;
+import java.io.IOException;
+import java.util.Objects;
+
+/**
+ * A simple visitor of files with default behavior to visit all files and to
+ * re-throw I/O errors.
+ *
+ * <p> Methods in this class may be overridden subject to their general contract.
+ *
+ * @param   <T>     The type of reference to the files
+ *
+ * @since 1.7
+ */
+
+public class SimpleFileVisitor<T> implements FileVisitor<T> {
+    /**
+     * Initializes a new instance of this class.
+     */
+    protected SimpleFileVisitor() {
+    }
+
+    /**
+     * Invoked for a directory before entries in the directory are visited.
+     *
+     * <p> Unless overridden, this method returns {@link FileVisitResult#CONTINUE
+     * CONTINUE}.
+     */
+    @Override
+    public FileVisitResult preVisitDirectory(T dir, BasicFileAttributes attrs)
+        throws IOException
+    {
+        Objects.requireNonNull(dir);
+        Objects.requireNonNull(attrs);
+        return FileVisitResult.CONTINUE;
+    }
+
+    /**
+     * Invoked for a file in a directory.
+     *
+     * <p> Unless overridden, this method returns {@link FileVisitResult#CONTINUE
+     * CONTINUE}.
+     */
+    @Override
+    public FileVisitResult visitFile(T file, BasicFileAttributes attrs)
+        throws IOException
+    {
+        Objects.requireNonNull(file);
+        Objects.requireNonNull(attrs);
+        return FileVisitResult.CONTINUE;
+    }
+
+    /**
+     * Invoked for a file that could not be visited.
+     *
+     * <p> Unless overridden, this method re-throws the I/O exception that prevented
+     * the file from being visited.
+     */
+    @Override
+    public FileVisitResult visitFileFailed(T file, IOException exc)
+        throws IOException
+    {
+        Objects.requireNonNull(file);
+        throw exc;
+    }
+
+    /**
+     * Invoked for a directory after entries in the directory, and all of their
+     * descendants, have been visited.
+     *
+     * <p> Unless overridden, this method returns {@link FileVisitResult#CONTINUE
+     * CONTINUE} if the directory iteration completes without an I/O exception;
+     * otherwise this method re-throws the I/O exception that caused the iteration
+     * of the directory to terminate prematurely.
+     */
+    @Override
+    public FileVisitResult postVisitDirectory(T dir, IOException exc)
+        throws IOException
+    {
+        Objects.requireNonNull(dir);
+        if (exc != null)
+            throw exc;
+        return FileVisitResult.CONTINUE;
+    }
+}